Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000001N2JE
Model Year Start: 2021 Model: Corolla Prod Date Range: [04/2020 - 09/2022]
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DTC COMBINATION TABLE; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]

DTC COMBINATION TABLE

HOW TO INTERPRET COMMUNICATION DTCS (DTCS THAT START WITH U)

(a) If a CAN communication error cannot be reproduced, determine the suspected malfunctioning part using the DTCs stored in ECUs that are connected to the CAN buses by following the procedure below.

HINT:

Communication DTCs (DTCs that start with U) indicate a communication error between the ECU that stores the DTC and the ECU that is indicated by the DTC.

(1) If multiple ECUs store a communication DTC for a particular ECU, a communication stop of the ECU is suspected.

*a

Items to be Checked

-

-

NOTICE:

  • This DTC table is from another model, and is only used here to show an example of DTCs that are output when there is an open in a CAN branch line for the main body ECU. This table does not show DTCs applicable to this vehicle.
  • Even though a DTC title may indicate a communication error with a specific ECU, the ECU name used in the DTC name on the Techstream may differ depending on the ECU that stores the DTC. (Regarding output DTCs, refer to DTC Table by ECU.)

    Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM

HINT:

As multiple ECUs indicate a communication stop with the main body ECU, the possibility of a communication stop of the main body ECU is high.

(2) If almost all of the communication DTCs of an ECU are stored, a communication stop of the ECU is suspected.

*a

Items to be Checked

-

-

NOTICE:

  • This DTC table is from another model, and is only used here to show an example of DTCs that are output when there is an open in a CAN branch line for the main body ECU. This table does not show DTCs applicable to this vehicle.
  • Even though a DTC title may indicate a communication error with a specific ECU, the ECU name used in the DTC name on the Techstream may differ depending on the ECU that stores the DTC. (Regarding output DTCs, refer to DTC Table by ECU.)

    Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM

HINT:

  • If almost all of the DTCs of the main body ECU are stored, the possibility of a communication stop of the main body ECU is high.
  • When a CAN communication error occurs, many DTCs are output. DTCs other than communication error DTCs (such as DTCs that start with C or B) and communication DTCs for the ABS system are important DTCs, however it may be easier to determine the malfunctioning part by examining the overall situation without considering these DTCs.

(b) To help determine the part of the sub bus that has a communication error, prioritize the communication stop DTCs stored in the gateway function equipped ECU.

*a

Items to be Checked

*b

ECM

*c

Gateway function equipped ECU

*d

Location of malfunction

*e

Central bus

*f

Sub bus

NOTICE:

This DTC table is from another model, and is only used here to show the ECUs connected to both a central bus and a sub bus. It shows DTCs output when there is an open in the main bus lines for the ECM on the sub bus. This table does not show DTCs applicable to this vehicle.

HINT:

  • As gateway function equipped ECUs (sub bus monitor ECU) monitor signals from all ECUs that are connected to sub buses, gateway function equipped ECUs can detect ECUs with a communication stop more accurately.
  • When there is a communication stop for the gateway function equipped ECU (gateway), communication with ECUs connected to other buses such as the central bus stops. Therefore, communication DTCs for ECUs connected to other buses are also stored.

(c) When any of the following malfunctions occurs, many DTCs are likely to be output from many ECUs. Because of this, it may be difficult to determine the probable malfunctioning part.

  • Short between CAN lines (CANH and CANL)
  • Short between a CAN line (CANH or CANL) and ground
  • Short between a CAN line (CANH or CANL) and +B
  • Open in a CAN branch line (CANH or CANL) of an ECU or sensor
  • Open in a CAN main bus line (CANH or CANL) between 2 ECUs that have a terminating resistor

DTC COMBINATION TABLE (OPEN OR SHORT IN BUS 1, PAST COMMUNICATION ERROR)

(a) If DTCs indicating a past communication error of an ECU or sensor connected to Bus 1 are output (but the bus is normal when performing the CAN bus check), the probable area that had a malfunction can be determined based on the following DTC combination table.

HINT:

  • Based on the table below and DTCs output from ECUs connected via CAN communication, the probable part for which communication stop occurred can be determined.
  • If there is a communication error due to an open in a CAN branch line, the malfunctioning area can easily be determined by performing a CAN bus check using the Techstream to determine which ECU or sensor that is connected to the open branch line is not responding (the ECU or sensor has a background color of red).
  • ○: DTC is output.
  • -: DTC is not output.
  • *1: DTC U0073 may be stored when communication is lost.
  • *2: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.
  • If an open occurs in just one of the wires of a CAN branch line, DTCs which are not related to malfunctioning parts may be output (DTCs may be displayed randomly), or a message indicating a communication error may be displayed.
  • If an open occurs in just one of the wires of a CAN branch line, even if the values in the following tables are "-", DTCs which are not related to malfunctioning parts may be output, or a message indicating a communication error may be displayed.

-

Trouble Mode

Open in CAN branch line(s)

Output ECU

Output DTC

Front Camera Module Communication Stop Mode

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Front Camera Module Communication Stop Mode

Millimeter Wave Radar Sensor Communication Stop Mode

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Millimeter Wave Radar Sensor Communication Stop Mode

Grille Shutter Communication Stop Mode

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Grille Shutter Communication Stop Mode

Blind Spot Monitor Sensor Communication Stop Mode

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Blind Spot Monitor Sensor Communication Stop Mode

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

-

Forward Recognition Camera

U012587

○

-

-

-

U012687

○

-

-

-

U012987

○

-

-

-

U013187

○

-

-

-

U014087

○

-

-

-

U015587

○

-

-

-

U029387

○

-

-

-

U110687

○

-

-

-

Millimeter Wave Radar Sensor Assembly

-

-

-

-

-

Swing Grille Actuator Assembly

-

-

-

-

-

Blind Spot Monitor Sensor LH

U0125

-

-

-

○

U0126

-

-

-

○

U0129

-

-

-

○

U0142

-

-

-

○

U0293

-

-

-

○

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0100

-

-

-

-

U0110

-

-

-

-

U0120

-

-

-

-

U0293

-

-

-

-

Hybrid Vehicle Control ECU

U010087

-

-

-

-

U011087

-

-

-

-

U012287

-

-

-

-

U016487

-

-

-

-

U110787

-

-

-

-

U117087

-

-

-

-

U117587

-

-

-

-

Bus 2

ECM

U011087

-

-

-

-

U012987

-

-

-

-

U028487

-

-

○

-

U029387

-

-

-

-

U117587

-

-

-

-

U129387

-

-

-

-

Inverter with Converter Assembly

U010087

-

-

-

-

U029387

-

-

-

-

U117087

-

-

-

-

Vehicle Approaching Speaker Controller

U0129

-

-

-

-

U0140

-

-

-

-

U0293

-

-

-

-

Battery ECU Assembly

U010087

-

-

-

-

U029387

-

-

-

-

Bus 3

Radio and Display Receiver Assembly*1

U0100

-

-

-

-

U0129

-

-

-

-

U0140

-

-

-

-

U0155

-

-

-

-

U0164

-

-

-

-

U0198

-

-

-

-

U0293

-

-

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

-

DCM (Telematics Transceiver)

U014087

-

-

-

-

U015587

-

-

-

-

U016387

-

-

-

-

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

-

-

-

-

U0126

-

-

-

-

U0128

-

-

-

-

U0151

-

-

-

-

U0293

-

-

-

-

Brake Actuator Assembly*1

U0100

-

-

-

-

U0124

-

-

-

-

U0129

-

-

-

-

U0293

-

-

-

-

ECM

-

-

-

-

-

Occupant Detection ECU

U0125

-

-

-

-

U0129

-

-

-

-

Airbag Sensor Assembly

U0154

-

-

-

-

Hybrid Vehicle Control ECU

U010487

○

-

-

-

U012987

-

-

-

-

U014087

-

-

-

-

U015187

-

-

-

-

Power Steering ECU with Motor Assembly

U012687

-

-

-

-

U012987

-

-

-

-

U023A87

○

-

-

-

U029387

-

-

-

-

Steering Sensor

-

-

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

-

-

-

-

U0131

-

-

-

-

U0142

-

-

-

-

U0151

-

-

-

-

U0155

-

-

-

-

U0293

-

-

-

-

Main Body ECU (Multiplex Network Body ECU)

U0100

-

-

-

-

U0101

-

-

-

-

U0120

-

-

-

-

U0126

-

-

-

-

U0129

-

-

-

-

U0151

-

-

-

-

U0155

-

-

-

-

U0163

-

-

-

-

U0164

-

-

-

-

U023A

○

-

-

-

U0293

-

-

-

-

U0327

-

-

-

-

U1106

-

-

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

-

-

-

-

U0129

-

-

-

-

U0142

-

-

-

-

U0155

-

-

-

-

U0293

-

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

-

-

-

-

U0155

-

-

-

-

U0293

-

-

-

-

Combination Meter Assembly

U010087

-

-

-

-

U012987

-

-

-

-

U013187

-

-

-

-

U014087

-

-

-

-

U015187

-

-

-

-

U016387

-

-

-

-

U016487

-

-

-

-

U016887

-

-

-

-

U023387

-

-

-

○

U023A87

○

-

-

-

U029387

-

-

-

-

U110687

-

-

-

-

U111287

-

-

-

-

U113387

-

-

-

-

-

Trouble Mode

Open in CAN main bus line(s)

Output ECU

Output DTC

Central Gateway ECU (Network Gateway ECU)

(CA1H and CA1L Terminal)

No. 1 CAN Junction Connector to No. 7 CAN Junction Connector

Central Gateway ECU (Network Gateway ECU)

(CAXH and CAXL Terminal)

(w/o Blind Spot Monitor System)

No. 7 CAN Junction Connector to Junction Terminal

(w/ Blind Spot Monitor System)

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

-

Forward Recognition Camera

U012587

○

-

-

-

U012687

○

-

-

-

U012987

○

-

-

-

U013187

○

-

-

-

U014087

○

-

-

-

U015587

○

-

-

-

U029387

○

-

-

-

U110687

○

-

-

-

Millimeter Wave Radar Sensor Assembly

-

-

-

-

-

Swing Grille Actuator Assembly

-

-

-

-

-

Blind Spot Monitor Sensor LH

U0125

○

○

-

-

U0126

○

○

-

-

U0129

○

○

-

-

U0142

○

○

-

-

U0293

○

○

-

-

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0100

-

-

-

-

U0110

-

-

-

-

U0120

-

-

-

-

U0293

-

-

-

-

Hybrid Vehicle Control ECU

U010087

-

-

-

-

U011087

-

-

-

-

U012287

-

-

-

-

U016487

-

-

-

-

U110787

-

-

-

-

U117087

-

-

-

-

U117587

-

-

-

-

ECM

U011087

-

-

-

-

U012987

-

-

-

-

U028487

○

-

-

-

U029387

-

-

-

-

U117587

-

-

-

-

U129387

-

-

-

-

Inverter with Converter Assembly

U010087

-

-

-

-

U029387

-

-

-

-

U117087

-

-

-

-

Bus 2

Vehicle Approaching Speaker Controller

U0129

-

-

-

-

U0140

-

-

-

-

U0293

-

-

-

-

Battery ECU Assembly

U010087

-

-

-

-

U029387

-

-

-

-

Bus 3

Radio and Display Receiver Assembly*1

U0100

-

-

-

-

U0129

-

-

-

-

U0140

-

-

-

-

U0155

-

-

-

-

U0164

-

-

-

-

U0198

-

-

-

-

U0293

-

-

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

-

DCM (Telematics Transceiver)

U014087

-

-

-

-

U015587

-

-

-

-

U016387

-

-

-

-

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

-

-

-

-

U0126

-

-

-

-

U0128

-

-

-

-

U0151

-

-

-

-

U0293

-

-

-

-

Brake Actuator Assembly*1

U0100

-

-

-

-

U0124

-

-

-

-

U0129

-

-

-

-

U0293

-

-

-

-

ECM

-

-

-

-

-

Occupant Detection ECU

U0125

-

-

-

-

U0129

-

-

-

-

Airbag Sensor Assembly

U0154

-

-

-

-

Hybrid Vehicle Control ECU

U010487

○

-

-

-

U012987

-

-

-

-

U014087

-

-

-

-

U015187

-

-

-

-

Power Steering ECU with Motor Assembly

U012687

-

-

-

-

U012987

-

-

-

-

U023A87

○

-

-

-

U029387

-

-

-

-

Steering Sensor

-

-

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

-

-

-

-

U0131

-

-

-

-

U0142

-

-

-

-

U0151

-

-

-

-

U0155

-

-

-

-

U0293

-

-

-

-

Bus 5

Main Body ECU (Multiplex Network Body ECU)

U0100

-

-

-

-

U0101

-

-

-

-

U0120

-

-

-

-

U0126

-

-

-

-

U0129

-

-

-

-

U0151

-

-

-

-

U0155

-

-

-

-

U0163

-

-

-

-

U0164

-

-

-

-

U023A

○

-

-

-

U0293

-

-

-

-

U0327

-

-

-

-

U1106

-

-

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

-

-

-

-

U0129

-

-

-

-

U0142

-

-

-

-

U0155

-

-

-

-

U0293

-

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

-

-

-

-

U0155

-

-

-

-

U0293

-

-

-

-

Combination Meter Assembly

U010087

-

-

-

-

U012987

-

-

-

-

U013187

-

-

-

-

U014087

-

-

-

-

U015187

-

-

-

-

U016387

-

-

-

-

U016487

-

-

-

-

U016887

-

-

-

-

U023387

○

○

-

-

U023A87

○

-

-

-

U029387

-

-

-

-

U110687

-

-

-

-

U111287

-

-

-

-

U113387

-

-

-

-

-

Trouble Mode

CAN bus lines short circuit or short to GND

Output ECU

Output DTC

CANH to CANL

CANH Short to Ground

CANL Short to Ground

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Bus 1

Forward Recognition Camera

U012587

○

○

○

U012687

○

○

○

U012987

○

○

○

U013187

○

○

○

U014087

○

○

○

U015587

○

○

○

U029387

○

○

○

U110687

○

○

○

Millimeter Wave Radar Sensor Assembly

-

-

-

-

Swing Grille Actuator Assembly

-

-

-

-

Blind Spot Monitor Sensor LH

U0125

○

○

○

U0126

○

○

○

U0129

○

○

○

U0142

○

○

○

U0293

○

○

○

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0100

-

-

-

U0110

-

-

-

U0120

-

-

-

U0293

-

-

-

Hybrid Vehicle Control ECU

U010087

-

-

-

U011087

-

-

-

U012287

-

-

-

U016487

-

-

-

U110787

-

-

-

U117087

-

-

-

U117587

-

-

-

ECM

U011087

-

-

-

U012987

-

-

-

U028487

○

○

○

U029387

-

-

-

U117587

-

-

-

U129387

-

-

-

Inverter with Converter Assembly

U010087

-

-

-

U029387

-

-

-

U117087

-

-

-

Vehicle Approaching Speaker Controller

U0129

-

-

-

U0140

-

-

-

U0293

-

-

-

Battery ECU Assembly

U010087

-

-

-

U029387

-

-

-

Bus 3

Radio and Display Receiver Assembly*1

U0100

-

-

-

U0129

-

-

-

U0140

-

-

-

U0155

-

-

-

U0164

-

-

-

U0198

-

-

-

U0293

-

-

-

Bus 3

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

DCM (Telematics Transceiver)

U014087

-

-

-

U015587

-

-

-

U016387

-

-

-

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

-

-

-

U0126

-

-

-

U0128

-

-

-

U0151

-

-

-

U0293

-

-

-

Brake Actuator Assembly*1

U0100

-

-

-

U0124

-

-

-

U0129

-

-

-

U0293

-

-

-

ECM

-

-

-

-

Occupant Detection ECU

U0125

-

-

-

U0129

-

-

-

Airbag Sensor Assembly

U0154

-

-

-

Hybrid Vehicle Control ECU

U010487

○

○

○

U012987

-

-

-

U014087

-

-

-

U015187

-

-

-

Power Steering ECU with Motor Assembly

U012687

-

-

-

U012987

-

-

-

U023A87

○

○

○

U029387

-

-

-

Steering Sensor

-

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

-

-

-

U0131

-

-

-

U0142

-

-

-

U0151

-

-

-

U0155

-

-

-

U0293

-

-

-

Main Body ECU (Multiplex Network Body ECU)

U0100

-

-

-

U0101

-

-

-

U0120

-

-

-

U0126

-

-

-

U0129

-

-

-

U0151

-

-

-

U0155

-

-

-

U0163

-

-

-

U0164

-

-

-

U023A

○

○

○

U0293

-

-

-

U0327

-

-

-

U1106

-

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Bus 5

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

-

-

-

U0129

-

-

-

U0142

-

-

-

U0155

-

-

-

U0293

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

-

-

-

U0155

-

-

-

U0293

-

-

-

Combination Meter Assembly

U010087

-

-

-

U012987

-

-

-

U013187

-

-

-

U014087

-

-

-

U015187

-

-

-

U016387

-

-

-

U016487

-

-

-

U016887

-

-

-

U023387

○

○

○

U023A87

○

○

○

U029387

-

-

-

U110687

-

-

-

U111287

-

-

-

U113387

-

-

-

DTC COMBINATION TABLE (OPEN OR SHORT IN BUS 2, PAST COMMUNICATION ERROR)

(a) If DTCs indicating a past communication error of an ECU or sensor connected to Bus 2 are output (but the bus is normal when performing the CAN bus check), the probable area that had a malfunction can be determined based on the following DTC combination table.

HINT:

  • Based on the table below and DTCs output from ECUs connected via CAN communication, the probable part for which communication stop occurred can be determined.
  • If there is a communication error due to an open in a CAN branch line, the malfunctioning area can easily be determined by performing a CAN bus check using the Techstream to determine which ECU or sensor that is connected to the open branch line is not responding (the ECU or sensor has a background color of red).
  • ○: DTC is output.
  • -: DTC is not output.
  • *1: DTC U0073 may be stored when communication is lost.
  • *2: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.
  • If an open occurs in just one of the wires of a CAN branch line, DTCs which are not related to malfunctioning parts may be output (DTCs may be displayed randomly), or a message indicating a communication error may be displayed.
  • If an open occurs in just one of the wires of a CAN branch line, even if the values in the following tables are "-", DTCs which are not related to malfunctioning parts may be output, or a message indicating a communication error may be displayed.

-

Trouble Mode

Open in CAN branch line(s)

Output ECU

Output DTC

Skid Control ECU Communication Stop Mode

2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Skid Control ECU Communication Stop Mode

Hybrid Vehicle Control ECU Communication Stop Mode

2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Hybrid Vehicle Control ECU Communication Stop Mode

Motor Generator Control ECU Communication Stop Mode

2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Motor Generator Control ECU Communication Stop Mode

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Forward Recognition Camera

U012587

-

-

-

U012687

-

-

-

U012987

-

-

-

U013187

-

-

-

U014087

-

-

-

U015587

-

-

-

U029387

-

-

-

U110687

-

-

-

Millimeter Wave Radar Sensor Assembly

-

-

-

-

Swing Grille Actuator Assembly

-

-

-

-

Blind Spot Monitor Sensor LH

U0125

-

-

-

U0126

-

-

-

U0129

-

-

-

U0142

-

-

-

U0293

-

-

-

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0100

○

-

-

U0110

○

-

○

U0120

○

-

-

U0293

○

○

-

Bus 2

Hybrid Vehicle Control ECU

U010087

-

○

-

U011087

-

○

○

U012287

○

○

-

U016487

-

○

-

U110787

-

○

-

U117087

○

○

-

U117587

-

-

-

ECM

U011087

-

-

○

U012987

○

-

-

U028487

-

-

-

U029387

-

○

-

U117587

-

-

-

U129387

-

-

-

Inverter with Converter Assembly

U010087

-

-

○

U029387

-

○

○

U117087

○

-

○

Vehicle Approaching Speaker Controller

U0129

-

-

-

U0140

-

-

-

U0293

-

○

-

Battery ECU Assembly

U010087

-

-

-

U029387

-

-

-

Bus 3

Radio and Display Receiver Assembly*1

U0100

-

-

-

U0129

-

-

-

U0140

-

-

-

U0155

-

-

-

U0164

-

-

-

U0198

-

-

-

U0293

-

○

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

DCM (Telematics Transceiver)

U014087

-

-

-

U015587

-

-

-

U016387

-

-

-

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

-

-

-

U0126

-

-

-

U0128

-

-

-

U0151

-

-

-

U0293

-

-

-

Brake Actuator Assembly*1

U0100

-

-

-

U0124

-

-

-

U0129

-

-

-

U0293

-

-

-

ECM

-

-

-

-

Occupant Detection ECU

U0125

-

-

-

U0129

-

-

-

Airbag Sensor Assembly

U0154

-

-

-

Bus 4

Hybrid Vehicle Control ECU

U010487

-

-

-

U012987

-

-

-

U014087

-

-

-

U015187

-

-

-

Power Steering ECU with Motor Assembly

U012687

-

-

-

U012987

-

-

-

U023A87

-

-

-

U029387

-

○

-

Steering Sensor

-

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

-

-

-

U0131

-

-

-

U0142

-

-

-

U0151

-

-

-

U0155

-

-

-

U0293

-

-

-

Main Body ECU (Multiplex Network Body ECU)

U0100

-

-

-

U0101

-

-

-

U0120

-

-

-

U0126

-

-

-

U0129

-

-

-

U0151

-

-

-

U0155

-

-

-

U0163

-

-

-

U0164

-

-

-

U023A

-

-

-

U0293

-

○

-

U0327

-

-

-

U1106

-

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

-

-

-

U0129

-

-

-

U0142

-

-

-

U0155

-

-

-

U0293

-

○

-

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

-

-

-

U0155

-

-

-

U0293

-

-

-

Bus 5

Combination Meter Assembly

U010087

-

-

-

U012987

-

-

-

U013187

-

-

-

U014087

-

-

-

U015187

-

-

-

U016387

-

-

-

U016487

-

-

-

U016887

-

-

-

U023387

-

-

-

U023A87

-

-

-

U029387

-

○

-

U110687

-

-

-

U111287

-

-

-

U113387

-

-

-

-

Trouble Mode

Open in CAN branch line(s)

Output ECU

Output DTC

Vehicle Approaching Sound ECU Communication Stop Mode

2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Vehicle Approaching Sound ECU Communication Stop Mode

Battery ECU Communication Stop Mode

2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Battery ECU Communication Stop Mode

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Forward Recognition Camera

U012587

-

-

U012687

-

-

U012987

-

-

U013187

-

-

U014087

-

-

U015587

-

-

U029387

-

-

U110687

-

-

Millimeter Wave Radar Sensor Assembly

-

-

-

Swing Grille Actuator Assembly

-

-

-

Blind Spot Monitor Sensor LH

U0125

-

-

U0126

-

-

U0129

-

-

U0142

-

-

U0293

-

-

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0100

-

-

U0110

-

-

U0120

-

-

U0293

-

-

Bus 2

Hybrid Vehicle Control ECU

U010087

-

-

U011087

-

-

U012287

-

-

U016487

-

-

U110787

-

-

U117087

-

-

U117587

-

-

ECM

U011087

-

-

U012987

-

-

U028487

-

-

U029387

-

-

U117587

-

-

U129387

-

-

Inverter with Converter Assembly

U010087

-

-

U029387

-

-

U117087

-

-

Vehicle Approaching Speaker Controller

U0129

○

-

U0140

○

-

U0293

○

-

Battery ECU Assembly

U010087

-

-

U029387

-

-

Bus 3

Radio and Display Receiver Assembly*1

U0100

-

-

U0129

-

-

U0140

-

-

U0155

-

-

U0164

-

-

U0198

-

-

U0293

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

DCM (Telematics Transceiver)

U014087

-

-

U015587

-

-

U016387

-

-

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

-

-

U0126

-

-

U0128

-

-

U0151

-

-

U0293

-

-

Brake Actuator Assembly*1

U0100

-

-

U0124

-

-

U0129

-

-

U0293

-

-

ECM

-

-

-

Occupant Detection ECU

U0125

-

-

U0129

-

-

Airbag Sensor Assembly

U0154

-

-

Bus 4

Hybrid Vehicle Control ECU

U010487

-

-

U012987

-

-

U014087

-

-

U015187

-

-

Power Steering ECU with Motor Assembly

U012687

-

-

U012987

-

-

U023A87

-

-

U029387

-

-

Steering Sensor

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

-

-

U0131

-

-

U0142

-

-

U0151

-

-

U0155

-

-

U0293

-

-

Main Body ECU (Multiplex Network Body ECU)

U0100

-

-

U0101

-

-

U0120

-

-

U0126

-

-

U0129

-

-

U0151

-

-

U0155

-

-

U0163

-

-

U0164

-

-

U023A

-

-

U0293

-

-

U0327

-

-

U1106

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

-

-

U0129

-

-

U0142

-

-

U0155

-

-

U0293

-

-

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

-

-

U0155

-

-

U0293

-

-

Bus 5

Combination Meter Assembly

U010087

-

-

U012987

-

-

U013187

-

-

U014087

-

-

U015187

-

-

U016387

-

-

U016487

-

-

U016887

-

-

U023387

-

-

U023A87

-

-

U029387

-

-

U110687

-

-

U111287

-

-

U113387

-

-

-

Trouble Mode

Open in CAN main bus line(s)

Output ECU

Output DTC

Central Gateway ECU (Network Gateway ECU)

ECM Communication Stop Mode

2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): ECM Communication Stop Mode

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Forward Recognition Camera

U012587

-

-

U012687

-

-

U012987

-

-

U013187

-

-

U014087

-

-

U015587

-

-

U029387

-

-

U110687

-

-

Millimeter Wave Radar Sensor Assembly

-

-

-

Swing Grille Actuator Assembly

-

-

-

Blind Spot Monitor Sensor LH

U0125

-

-

U0126

-

-

U0129

-

-

U0142

-

-

U0293

-

-

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0100

-

○

U0110

-

-

U0120

○

-

U0293

-

-

Bus 2

Hybrid Vehicle Control ECU

U010087

-

○

U011087

-

-

U012287

-

-

U016487

○

-

U110787

○

-

U117087

-

-

U117587

-

-

ECM

U011087

-

○

U012987

-

○

U028487

○

○

U029387

-

○

U117587

-

-

U129387

-

-

Inverter with Converter Assembly

U010087

-

○

U029387

-

-

U117087

-

-

Vehicle Approaching Speaker Controller

U0129

○

-

U0140

○

-

U0293

-

-

Battery ECU Assembly

U010087

-

-

U029387

-

-

Bus 3

Radio and Display Receiver Assembly*1

U0100

○

○

U0129

-

-

U0140

-

-

U0155

-

-

U0164

-

-

U0198

-

-

U0293

○

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

DCM (Telematics Transceiver)

U014087

-

-

U015587

-

-

U016387

-

-

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

-

-

U0126

-

-

U0128

-

-

U0151

-

-

U0293

-

-

Brake Actuator Assembly*1

U0100

-

-

U0124

-

-

U0129

-

-

U0293

-

-

ECM

-

-

-

Occupant Detection ECU

U0125

-

-

U0129

-

-

Airbag Sensor Assembly

U0154

-

-

Bus 4

Hybrid Vehicle Control ECU

U010487

-

-

U012987

-

-

U014087

-

-

U015187

-

-

Power Steering ECU with Motor Assembly

U012687

-

-

U012987

-

-

U023A87

-

-

U029387

○

-

Steering Sensor

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

-

-

U0131

-

-

U0142

-

-

U0151

-

-

U0155

-

-

U0293

○

○

Main Body ECU (Multiplex Network Body ECU)

U0100

-

-

U0101

-

-

U0120

-

-

U0126

-

-

U0129

-

-

U0151

-

-

U0155

-

-

U0163

-

-

U0164

-

-

U023A

-

-

U0293

○

-

U0327

-

-

U1106

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

-

-

U0129

-

-

U0142

-

-

U0155

-

-

U0293

○

-

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

-

-

U0155

-

-

U0293

-

-

Bus 5

Combination Meter Assembly

U010087

-

-

U012987

-

-

U013187

-

-

U014087

-

-

U015187

-

-

U016387

-

-

U016487

-

-

U016887

-

-

U023387

-

-

U023A87

-

-

U029387

○

-

U110687

-

-

U111287

-

-

U113387

-

-

-

Trouble Mode

CAN bus lines short circuit or short to GND

Output ECU

Output DTC

CANH to CANL

CANH Short to Ground

CANL Short to Ground

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Forward Recognition Camera

U012587

-

-

-

U012687

-

-

-

U012987

-

-

-

U013187

-

-

-

U014087

-

-

-

U015587

-

-

-

U029387

-

-

-

U110687

-

-

-

Millimeter Wave Radar Sensor Assembly

-

-

-

-

Swing Grille Actuator Assembly

-

-

-

-

Blind Spot Monitor Sensor LH

U0125

-

-

-

U0126

-

-

-

U0129

-

-

-

U0142

-

-

-

U0293

-

-

-

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0100

○

○

○

U0110

○

○

○

U0120

○

○

○

U0293

○

○

○

Bus 2

Hybrid Vehicle Control ECU

U010087

○

○

○

U011087

○

○

○

U012287

○

○

○

U016487

○

○

○

U110787

○

○

○

U117087

○

○

○

U117587

○

○

○

ECM

U011087

○

○

○

U012987

○

○

○

U028487

○

○

○

U029387

○

○

○

U117587

○

○

○

U129387

-

-

-

Inverter with Converter Assembly

U010087

○

○

○

U029387

○

○

○

U117087

○

○

○

Vehicle Approaching Speaker Controller

U0129

○

○

○

U0140

○

○

○

U0293

○

○

○

Battery ECU Assembly

U010087

○

○

○

U029387

○

○

○

Bus 3

Radio and Display Receiver Assembly*1

U0100

○

○

○

U0129

-

-

-

U0140

-

-

-

U0155

-

-

-

U0164

-

-

-

U0198

-

-

-

U0293

○

○

○

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

DCM (Telematics Transceiver)

U014087

-

-

-

U015587

-

-

-

U016387

-

-

-

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

-

-

-

U0126

-

-

-

U0128

-

-

-

U0151

-

-

-

U0293

-

-

-

Brake Actuator Assembly*1

U0100

-

-

-

U0124

-

-

-

U0129

-

-

-

U0293

-

-

-

ECM

-

-

-

-

Occupant Detection ECU

U0125

-

-

-

U0129

-

-

-

Airbag Sensor Assembly

U0154

-

-

-

Bus 4

Hybrid Vehicle Control ECU

U010487

-

-

-

U012987

-

-

-

U014087

-

-

-

U015187

-

-

-

Power Steering ECU with Motor Assembly

U012687

-

-

-

U012987

-

-

-

U023A87

-

-

-

U029387

○

○

○

Steering Sensor

-

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

-

-

-

U0131

-

-

-

U0142

-

-

-

U0151

-

-

-

U0155

-

-

-

U0293

○

○

○

Main Body ECU (Multiplex Network Body ECU)

U0100

-

-

-

U0101

-

-

-

U0120

-

-

-

U0126

-

-

-

U0129

-

-

-

U0151

-

-

-

U0155

-

-

-

U0163

-

-

-

U0164

-

-

-

U023A

-

-

-

U0293

○

○

○

U0327

-

-

-

U1106

-

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

-

-

-

U0129

-

-

-

U0142

-

-

-

U0155

-

-

-

U0293

○

○

○

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

-

-

-

U0155

-

-

-

U0293

-

-

-

Bus 5

Combination Meter Assembly

U010087

-

-

-

U012987

-

-

-

U013187

-

-

-

U014087

-

-

-

U015187

-

-

-

U016387

-

-

-

U016487

-

-

-

U016887

-

-

-

U023387

-

-

-

U023A87

-

-

-

U029387

○

○

○

U110687

-

-

-

U111287

-

-

-

U113387

-

-

-

DTC COMBINATION TABLE (OPEN OR SHORT IN BUS 3, PAST COMMUNICATION ERROR)

(a) If DTCs indicating a past communication error of an ECU or sensor connected to Bus 3 are output (but the bus is normal when performing the CAN bus check), the probable area that had a malfunction can be determined based on the following DTC combination table.

HINT:

  • Based on the table below and DTCs output from ECUs connected via CAN communication, the probable part for which communication stop occurred can be determined.
  • If there is a communication error due to an open in a CAN branch line, the malfunctioning area can easily be determined by performing a CAN bus check using the Techstream to determine which ECU or sensor that is connected to the open branch line is not responding (the ECU or sensor has a background color of red).
  • ○: DTC is output.
  • -: DTC is not output.
  • *1: DTC U0073 may be stored when communication is lost.
  • *2: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.
  • If an open occurs in just one of the wires of a CAN branch line, DTCs which are not related to malfunctioning parts may be output (DTCs may be displayed randomly), or a message indicating a communication error may be displayed.
  • If an open occurs in just one of the wires of a CAN branch line, even if the values in the following tables are "-", DTCs which are not related to malfunctioning parts may be output, or a message indicating a communication error may be displayed.

-

Trouble Mode

Open in CAN branch line(s)

Output ECU

Output DTC

Radio Receiver Assembly Communication Stop Mode

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Radio Receiver Assembly Communication Stop Mode

DCM Communication Stop Mode

2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DCM Communication Stop Mode

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Forward Recognition Camera

U012587

-

-

U012687

-

-

U012987

-

-

U013187

-

-

U014087

-

-

U015587

-

-

U029387

-

-

U110687

-

-

Millimeter Wave Radar Sensor Assembly

-

-

-

Swing Grille Actuator Assembly

-

-

-

Blind Spot Monitor Sensor LH

U0125

-

-

U0126

-

-

U0129

-

-

U0142

-

-

U0293

-

-

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0100

-

-

U0110

-

-

U0120

-

-

U0293

-

-

Hybrid Vehicle Control ECU

U010087

-

-

U011087

-

-

U012287

-

-

U016487

-

-

U110787

-

-

U117087

-

-

U117587

-

-

ECM

U011087

-

-

U012987

-

-

U028487

-

-

U029387

-

-

U117587

-

-

U129387

-

-

Inverter with Converter Assembly

U010087

-

-

U029387

-

-

U117087

-

-

Vehicle Approaching Speaker Controller

U0129

-

-

U0140

-

-

U0293

-

-

Bus 2

Battery ECU Assembly

U010087

-

-

U029387

-

-

Bus 3

Radio and Display Receiver Assembly*1

U0100

○

-

U0129

○

-

U0140

○

-

U0155

○

-

U0164

○

-

U0198

○

○

U0293

○

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

DCM (Telematics Transceiver)

U014087

-

○

U015587

-

○

U016387

○

○

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

-

-

U0126

-

-

U0128

-

-

U0151

-

-

U0293

-

-

Brake Actuator Assembly*1

U0100

-

-

U0124

-

-

U0129

-

-

U0293

-

-

ECM

-

-

-

Occupant Detection ECU

U0125

-

-

U0129

-

-

Airbag Sensor Assembly

U0154

-

-

Hybrid Vehicle Control ECU

U010487

-

-

U012987

-

-

U014087

-

-

U015187

-

-

Power Steering ECU with Motor Assembly

U012687

-

-

U012987

-

-

U023A87

-

-

U029387

-

-

Steering Sensor

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

-

-

U0131

-

-

U0142

-

-

U0151

-

-

U0155

-

-

U0293

-

-

Bus 5

Main Body ECU (Multiplex Network Body ECU)

U0100

-

-

U0101

-

-

U0120

-

-

U0126

-

-

U0129

-

-

U0151

-

-

U0155

-

-

U0163

○

-

U0164

-

-

U023A

-

-

U0293

-

-

U0327

-

-

U1106

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

-

-

U0129

-

-

U0142

-

-

U0155

-

-

U0293

-

-

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

-

-

U0155

-

-

U0293

-

-

Combination Meter Assembly

U010087

-

-

U012987

-

-

U013187

-

-

U014087

-

-

U015187

-

-

U016387

○

-

U016487

-

-

U016887

-

-

U023387

-

-

U023A87

-

-

U029387

-

-

U110687

-

-

U111287

-

-

U113387

-

-

-

Trouble Mode

Open in CAN main bus line(s)

Output ECU

Output DTC

Central Gateway ECU (Network Gateway ECU)

(CA3H and CA3L Terminal)

Central Gateway ECU (Network Gateway ECU)

(CAYH and CAYL Terminal)

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Bus 1

Forward Recognition Camera

U012587

-

-

U012687

-

-

U012987

-

-

U013187

-

-

U014087

-

-

U015587

-

-

U029387

-

-

U110687

-

-

Millimeter Wave Radar Sensor Assembly

-

-

-

Swing Grille Actuator Assembly

-

-

-

Blind Spot Monitor Sensor LH

U0125

-

-

U0126

-

-

U0129

-

-

U0142

-

-

U0293

-

-

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0100

-

-

U0110

-

-

U0120

-

-

U0293

-

-

Hybrid Vehicle Control ECU

U010087

-

-

U011087

-

-

U012287

-

-

U016487

-

-

U110787

-

-

U117087

-

-

U117587

-

-

ECM

U011087

-

-

U012987

-

-

U028487

-

-

U029387

-

-

U117587

-

-

U129387

-

-

Inverter with Converter Assembly

U010087

-

-

U029387

-

-

U117087

-

-

Vehicle Approaching Speaker Controller

U0129

-

-

U0140

-

-

U0293

-

-

Battery ECU Assembly

U010087

-

-

U029387

-

-

Bus 3

Radio and Display Receiver Assembly*1

U0100

○

-

U0129

○

-

U0140

○

-

U0155

○

-

U0164

○

-

U0198

-

-

U0293

○

-

Bus 3

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

DCM (Telematics Transceiver)

U014087

○

-

U015587

○

-

U016387

-

-

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

-

-

U0126

-

-

U0128

-

-

U0151

-

-

U0293

-

-

Brake Actuator Assembly*1

U0100

-

-

U0124

-

-

U0129

-

-

U0293

-

-

ECM

-

-

-

Occupant Detection ECU

U0125

-

-

U0129

-

-

Airbag Sensor Assembly

U0154

-

-

Hybrid Vehicle Control ECU

U010487

-

-

U012987

-

-

U014087

-

-

U015187

-

-

Power Steering ECU with Motor Assembly

U012687

-

-

U012987

-

-

U023A87

-

-

U029387

-

-

Steering Sensor

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

-

-

U0131

-

-

U0142

-

-

U0151

-

-

U0155

-

-

U0293

-

-

Main Body ECU (Multiplex Network Body ECU)

U0100

-

-

U0101

-

-

U0120

-

-

U0126

-

-

U0129

-

-

U0151

-

-

U0155

-

-

U0163

○

-

U0164

-

-

U023A

-

-

U0293

-

-

U0327

-

-

U1106

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Bus 5

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

-

-

U0129

-

-

U0142

-

-

U0155

-

-

U0293

-

-

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

-

-

U0155

-

-

U0293

-

-

Combination Meter Assembly

U010087

-

-

U012987

-

-

U013187

-

-

U014087

-

-

U015187

-

-

U016387

○

-

U016487

-

-

U016887

-

-

U023387

-

-

U023A87

-

-

U029387

-

-

U110687

-

-

U111287

-

-

U113387

-

-

-

Trouble Mode

CAN bus lines short circuit or short to GND

Output ECU

Output DTC

CANH to CANL

CANH Short to Ground

CANL Short to Ground

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Forward Recognition Camera

U012587

-

-

-

U012687

-

-

-

U012987

-

-

-

U013187

-

-

-

U014087

-

-

-

U015587

-

-

-

U029387

-

-

-

U110687

-

-

-

Millimeter Wave Radar Sensor Assembly

-

-

-

-

Swing Grille Actuator Assembly

-

-

-

-

Blind Spot Monitor Sensor LH

U0125

-

-

-

U0126

-

-

-

U0129

-

-

-

U0142

-

-

-

U0293

-

-

-

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Bus 2

Brake Booster with Master Cylinder Assembly*1

U0100

-

-

-

U0110

-

-

-

U0120

-

-

-

U0293

-

-

-

Hybrid Vehicle Control ECU

U010087

-

-

-

U011087

-

-

-

U012287

-

-

-

U016487

-

-

-

U110787

-

-

-

U117087

-

-

-

U117587

-

-

-

ECM

U011087

-

-

-

U012987

-

-

-

U028487

-

-

-

U029387

-

-

-

U117587

-

-

-

U129387

-

-

-

Inverter with Converter Assembly

U010087

-

-

-

U029387

-

-

-

U117087

-

-

-

Vehicle Approaching Speaker Controller

U0129

-

-

-

U0140

-

-

-

U0293

-

-

-

Battery ECU Assembly

U010087

-

-

-

U029387

-

-

-

Bus 3

Radio and Display Receiver Assembly*1

U0100

○

○

○

U0129

○

○

○

U0140

○

○

○

U0155

○

○

○

U0164

○

○

○

U0198

○

○

○

U0293

○

○

○

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

DCM (Telematics Transceiver)

U014087

○

○

○

U015587

○

○

○

U016387

○

○

○

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

-

-

-

U0126

-

-

-

U0128

-

-

-

U0151

-

-

-

U0293

-

-

-

Brake Actuator Assembly*1

U0100

-

-

-

U0124

-

-

-

U0129

-

-

-

U0293

-

-

-

ECM

-

-

-

-

Occupant Detection ECU

U0125

-

-

-

U0129

-

-

-

Bus 4

Airbag Sensor Assembly

U0154

-

-

-

Hybrid Vehicle Control ECU

U010487

-

-

-

U012987

-

-

-

U014087

-

-

-

U015187

-

-

-

Power Steering ECU with Motor Assembly

U012687

-

-

-

U012987

-

-

-

U023A87

-

-

-

U029387

-

-

-

Steering Sensor

-

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

-

-

-

U0131

-

-

-

U0142

-

-

-

U0151

-

-

-

U0155

-

-

-

U0293

-

-

-

Main Body ECU (Multiplex Network Body ECU)

U0100

-

-

-

U0101

-

-

-

U0120

-

-

-

U0126

-

-

-

U0129

-

-

-

U0151

-

-

-

U0155

-

-

-

U0163

○

○

○

U0164

-

-

-

U023A

-

-

-

U0293

-

-

-

U0327

-

-

-

U1106

-

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

-

-

-

U0129

-

-

-

U0142

-

-

-

U0155

-

-

-

U0293

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

-

-

-

U0155

-

-

-

U0293

-

-

-

Bus 5

Combination Meter Assembly

U010087

-

-

-

U012987

-

-

-

U013187

-

-

-

U014087

-

-

-

U015187

-

-

-

U016387

○

○

○

U016487

-

-

-

U016887

-

-

-

U023387

-

-

-

U023A87

-

-

-

U029387

-

-

-

U110687

-

-

-

U111287

-

-

-

U113387

-

-

-

DTC COMBINATION TABLE (OPEN OR SHORT IN BUS 4, PAST COMMUNICATION ERROR)

(a) If DTCs indicating a past communication error of an ECU or sensor connected to Bus 4 are output (but the bus is normal when performing the CAN bus check), the probable area that had a malfunction can be determined based on the following DTC combination table.

HINT:

  • Based on the table below and DTCs output from ECUs connected via CAN communication, the probable part for which communication stop occurred can be determined.
  • If there is a communication error due to an open in a CAN branch line, the malfunctioning area can easily be determined by performing a CAN bus check using the Techstream to determine which ECU or sensor that is connected to the open branch line is not responding (the ECU or sensor has a background color of red).
  • ○: DTC is output.
  • -: DTC is not output.
  • *1: DTC U0073 may be stored when communication is lost.
  • *2: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.
  • If an open occurs in just one of the wires of a CAN branch line, DTCs which are not related to malfunctioning parts may be output (DTCs may be displayed randomly), or a message indicating a communication error may be displayed.
  • If an open occurs in just one of the wires of a CAN branch line, even if the values in the following tables are "-", DTCs which are not related to malfunctioning parts may be output, or a message indicating a communication error may be displayed.

-

Trouble Mode

Open in CAN branch line(s)

Output ECU

Output DTC

Skid Control ECU Communication Stop Mode

2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Skid Control ECU Communication Stop Mode

Electric Parking Brake ECU Communication Stop Mode

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Electric Parking Brake ECU Communication Stop Mode

ECM Communication Stop Mode

2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): ECM Communication Stop Mode

Restraints Occupant Classification System Module Communication Stop Mode

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Restraints Occupant Classification System Module Communication Stop Mode

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

-

Forward Recognition Camera

U012587

-

-

-

-

U012687

-

-

-

-

U012987

○

-

-

-

U013187

-

-

-

-

U014087

-

-

-

-

U015587

-

-

-

-

U029387

-

-

-

-

U110687

-

○

-

-

Millimeter Wave Radar Sensor Assembly

-

-

-

-

-

Swing Grille Actuator Assembly

-

-

-

-

-

Blind Spot Monitor Sensor LH

U0125

-

-

-

-

U0126

-

-

-

-

U0129

○

-

-

-

U0142

-

-

-

-

U0293

-

-

-

-

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0100

-

-

-

-

U0110

-

-

-

-

U0120

-

-

-

-

U0293

-

-

-

-

Hybrid Vehicle Control ECU

U010087

-

-

-

-

U011087

-

-

-

-

U012287

-

-

-

-

U016487

-

-

-

-

U110787

-

-

-

-

U117087

-

-

-

-

U117587

-

-

-

-

Bus 2

ECM

U011087

-

-

-

-

U012987

-

-

-

-

U028487

-

-

-

-

U029387

-

-

-

-

U117587

-

-

-

-

U129387

-

-

-

-

Inverter with Converter Assembly

U010087

-

-

-

-

U029387

-

-

-

-

U117087

-

-

-

-

Vehicle Approaching Speaker Controller

U0129

○

-

-

-

U0140

-

-

-

-

U0293

-

-

-

-

Battery ECU Assembly

U010087

-

-

-

-

U029387

-

-

-

-

Bus 3

Radio and Display Receiver Assembly*1

U0100

-

-

-

-

U0129

○

-

-

-

U0140

-

-

-

-

U0155

-

-

-

-

U0164

-

-

-

-

U0198

-

-

-

-

U0293

-

-

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

-

DCM (Telematics Transceiver)

U014087

-

-

-

-

U015587

-

-

-

-

U016387

-

-

-

-

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

○

-

-

-

U0126

○

-

-

-

U0128

○

○

-

-

U0151

○

-

-

-

U0293

○

-

-

-

Brake Actuator Assembly*1

U0100

-

○

-

-

U0124

-

○

-

-

U0129

○

○

-

-

U0293

-

○

-

-

ECM

-

-

-

-

-

Occupant Detection ECU

U0125

-

-

-

○

U0129

○

-

-

○

Airbag Sensor Assembly

U0154

-

-

-

○

Hybrid Vehicle Control ECU

U010487

-

-

-

-

U012987

○

-

-

-

U014087

-

-

-

-

U015187

-

-

-

-

Power Steering ECU with Motor Assembly

U012687

-

-

-

-

U012987

○

-

-

-

U023A87

-

-

-

-

U029387

-

-

-

-

Steering Sensor

-

-

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

-

-

-

-

U0131

-

-

-

-

U0142

-

-

-

-

U0151

-

-

-

-

U0155

-

-

-

-

U0293

-

-

-

-

Main Body ECU (Multiplex Network Body ECU)

U0100

-

-

○

-

U0101

-

-

-

-

U0120

-

-

-

-

U0126

-

-

-

-

U0129

○

-

-

-

U0151

-

-

-

-

U0155

-

-

-

-

U0163

-

-

-

-

U0164

-

-

-

-

U023A

-

-

-

-

U0293

-

-

-

-

U0327

-

-

-

-

U1106

-

○

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

-

-

○

-

U0129

○

-

-

-

U0142

-

-

-

-

U0155

-

-

-

-

U0293

-

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

-

-

-

-

U0155

-

-

-

-

U0293

-

-

-

-

Combination Meter Assembly

U010087

-

-

○

-

U012987

○

-

-

-

U013187

-

-

-

-

U014087

-

-

-

-

U015187

-

-

-

-

U016387

-

-

-

-

U016487

-

-

-

-

U016887

-

-

-

-

U023387

-

-

-

-

U023A87

-

-

-

-

U029387

-

-

-

-

U110687

-

○

-

-

U111287

-

-

-

-

U113387

-

-

-

-

-

Trouble Mode

Open in CAN branch line(s)

Output ECU

Output DTC

Hybrid Vehicle Control ECU Communication Stop Mode

2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Hybrid Vehicle Control ECU Communication Stop Mode

Power Steering ECU Communication Stop Mode

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Power Steering ECU Communication Stop Mode

Steering Angle Sensor Communication Stop Mode

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Steering Angle Sensor Communication Stop Mode

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Forward Recognition Camera

U012587

-

-

-

U012687

-

-

○

U012987

-

-

-

U013187

-

○

-

U014087

-

-

-

U015587

-

-

-

U029387

○

-

-

U110687

-

-

-

Millimeter Wave Radar Sensor Assembly

-

-

-

-

Swing Grille Actuator Assembly

-

-

-

-

Blind Spot Monitor Sensor LH

U0125

-

-

-

U0126

-

-

○

U0129

-

-

-

U0142

-

-

-

U0293

○

-

-

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0100

-

-

-

U0110

-

-

-

U0120

-

-

-

U0293

-

-

-

Hybrid Vehicle Control ECU

U010087

-

-

-

U011087

-

-

-

U012287

-

-

-

U016487

-

-

-

U110787

-

-

-

U117087

-

-

-

U117587

-

-

-

ECM

U011087

-

-

-

U012987

-

-

-

U028487

-

-

-

U029387

-

-

-

U117587

-

-

-

U129387

-

-

-

Bus 2

Inverter with Converter Assembly

U010087

-

-

-

U029387

-

-

-

U117087

-

-

-

Vehicle Approaching Speaker Controller

U0129

-

-

-

U0140

-

-

-

U0293

-

-

-

Battery ECU Assembly

U010087

-

-

-

U029387

-

-

-

Bus 3

Radio and Display Receiver Assembly*1

U0100

-

-

-

U0129

-

-

-

U0140

-

-

-

U0155

-

-

-

U0164

-

-

-

U0198

-

-

-

U0293

-

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

DCM (Telematics Transceiver)

U014087

-

-

-

U015587

-

-

-

U016387

-

-

-

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

-

-

-

U0126

-

-

○

U0128

-

-

-

U0151

-

-

-

U0293

○

-

-

Brake Actuator Assembly*1

U0100

○

-

-

U0124

-

-

-

U0129

-

-

-

U0293

○

-

-

ECM

-

-

-

-

Occupant Detection ECU

U0125

-

-

-

U0129

-

-

-

Airbag Sensor Assembly

U0154

-

-

-

Hybrid Vehicle Control ECU

U010487

○

-

-

U012987

○

-

-

U014087

○

-

-

U015187

○

-

-

Power Steering ECU with Motor Assembly

U012687

-

○

○

U012987

-

○

-

U023A87

-

○

-

U029387

-

○

-

Steering Sensor

-

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

○

-

-

U0131

-

○

-

U0142

-

-

-

U0151

-

-

-

U0155

-

-

-

U0293

○

-

-

Bus 5

Main Body ECU (Multiplex Network Body ECU)

U0100

-

-

-

U0101

○

-

-

U0120

-

-

-

U0126

-

-

○

U0129

-

-

-

U0151

-

-

-

U0155

-

-

-

U0163

-

-

-

U0164

-

-

-

U023A

-

-

-

U0293

-

-

-

U0327

-

-

-

U1106

-

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

-

-

-

U0129

-

-

-

U0142

-

-

-

U0155

-

-

-

U0293

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

-

-

-

U0155

-

-

-

U0293

○

-

-

Combination Meter Assembly

U010087

-

-

-

U012987

-

-

-

U013187

-

○

-

U014087

-

-

-

U015187

-

-

-

U016387

-

-

-

U016487

-

-

-

U016887

-

-

-

U023387

-

-

-

U023A87

-

-

-

U029387

-

-

-

U110687

-

-

-

U111287

-

-

○

U113387

-

-

-

-

Trouble Mode

Open in CAN main bus line(s)

Output ECU

Output DTC

Central Gateway ECU (Network Gateway ECU)

No. 5 CAN Junction Connector to No. 4 CAN Junction Connector

Center Airbag Sensor Communication Stop Mode

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Center Airbag Sensor Communication Stop Mode

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Forward Recognition Camera

U012587

○

○

○

U012687

○

○

-

U012987

○

-

-

U013187

○

○

-

U014087

-

-

-

U015587

-

-

-

U029387

○

○

-

U110687

○

-

-

Millimeter Wave Radar Sensor Assembly

-

-

-

-

Swing Grille Actuator Assembly

-

-

-

-

Blind Spot Monitor Sensor LH

U0125

○

○

○

U0126

○

○

-

U0129

○

-

-

U0142

-

-

-

U0293

○

○

-

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0100

-

-

-

U0110

-

-

-

U0120

-

-

-

U0293

-

-

-

Hybrid Vehicle Control ECU

U010087

-

-

-

U011087

-

-

-

U012287

-

-

-

U016487

-

-

-

U110787

-

-

-

U117087

-

-

-

U117587

-

-

-

ECM

U011087

-

-

-

U012987

-

-

-

U028487

-

-

-

U029387

-

-

-

U117587

-

-

-

U129387

-

-

-

Inverter with Converter Assembly

U010087

-

-

-

U029387

-

-

-

U117087

-

-

-

Vehicle Approaching Speaker Controller

U0129

○

-

-

U0140

-

-

-

U0293

-

-

-

Battery ECU Assembly

U010087

-

-

-

U029387

-

-

-

Bus 3

Radio and Display Receiver Assembly*1

U0100

-

-

-

U0129

○

-

-

U0140

-

-

-

U0155

-

-

-

U0164

-

-

-

U0198

-

-

-

U0293

-

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

DCM (Telematics Transceiver)

U014087

-

-

-

U015587

-

-

-

U016387

-

-

-

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

-

○

○

U0126

-

○

-

U0128

-

-

-

U0151

○

-

-

U0293

-

○

-

Brake Actuator Assembly*1

U0100

-

○

-

U0124

-

○

○

U0129

-

-

-

U0293

-

○

-

ECM

-

-

-

-

Occupant Detection ECU

U0125

-

○

○

U0129

-

-

-

Airbag Sensor Assembly

U0154

-

○

○

Hybrid Vehicle Control ECU

U010487

○

○

-

U012987

-

○

-

U014087

○

○

-

U015187

-

-

○

Power Steering ECU with Motor Assembly

U012687

-

-

-

U012987

-

○

-

U023A87

○

○

-

U029387

○

○

-

Steering Sensor

-

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

○

○

-

U0131

○

○

-

U0142

-

-

-

U0151

○

○

○

U0155

-

-

-

U0293

○

○

-

Bus 5

Main Body ECU (Multiplex Network Body ECU)

U0100

○

-

-

U0101

○

○

-

U0120

-

-

-

U0126

○

○

-

U0129

-

-

-

U0151

○

○

○

U0155

-

-

-

U0163

-

-

-

U0164

-

-

-

U023A

-

-

-

U0293

-

-

-

U0327

-

-

-

U1106

○

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

○

-

-

U0129

○

-

-

U0142

-

-

-

U0155

-

-

-

U0293

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

-

-

-

U0155

-

-

-

U0293

○

○

-

Combination Meter Assembly

U010087

○

-

-

U012987

○

-

-

U013187

○

○

-

U014087

-

-

-

U015187

○

○

○

U016387

-

-

-

U016487

-

-

-

U016887

-

-

-

U023387

-

-

-

U023A87

-

-

-

U029387

-

-

-

U110687

○

-

-

U111287

○

○

-

U113387

-

-

-

-

Trouble Mode

CAN bus lines short circuit or short to GND

Output ECU

Output DTC

CANH to CANL

CANH Short to Ground

CANL Short to Ground

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Bus 1

Forward Recognition Camera

U012587

○

○

○

U012687

○

○

○

U012987

○

○

○

U013187

○

○

○

U014087

-

-

-

U015587

-

-

-

U029387

○

○

○

U110687

○

○

○

Millimeter Wave Radar Sensor Assembly

-

-

-

-

Swing Grille Actuator Assembly

-

-

-

-

Blind Spot Monitor Sensor LH

U0125

○

○

○

U0126

○

○

○

U0129

○

○

○

U0142

-

-

-

U0293

○

○

○

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0100

-

-

-

U0110

-

-

-

U0120

-

-

-

U0293

-

-

-

Hybrid Vehicle Control ECU

U010087

-

-

-

U011087

-

-

-

U012287

-

-

-

U016487

-

-

-

U110787

-

-

-

U117087

-

-

-

U117587

-

-

-

ECM

U011087

-

-

-

U012987

-

-

-

U028487

-

-

-

U029387

-

-

-

U117587

-

-

-

U129387

-

-

-

Inverter with Converter Assembly

U010087

-

-

-

U029387

-

-

-

U117087

-

-

-

Vehicle Approaching Speaker Controller

U0129

○

○

○

U0140

-

-

-

U0293

-

-

-

Battery ECU Assembly

U010087

-

-

-

U029387

-

-

-

Bus 3

Radio and Display Receiver Assembly*1

U0100

-

-

-

U0129

○

○

○

U0140

-

-

-

U0155

-

-

-

U0164

-

-

-

U0198

-

-

-

U0293

-

-

-

Bus 3

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

DCM (Telematics Transceiver)

U014087

-

-

-

U015587

-

-

-

U016387

-

-

-

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

○

○

○

U0126

○

○

○

U0128

○

○

○

U0151

○

○

○

U0293

○

○

○

Brake Actuator Assembly*1

U0100

○

○

○

U0124

○

○

○

U0129

○

○

○

U0293

○

○

○

ECM

-

-

-

-

Occupant Detection ECU

U0125

○

○

○

U0129

○

○

○

Airbag Sensor Assembly

U0154

○

○

○

Hybrid Vehicle Control ECU

U010487

○

○

○

U012987

○

○

○

U014087

○

○

○

U015187

○

○

○

Power Steering ECU with Motor Assembly

U012687

○

○

○

U012987

○

○

○

U023A87

○

○

○

U029387

○

○

○

Steering Sensor

-

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

○

○

○

U0131

○

○

○

U0142

-

-

-

U0151

○

○

○

U0155

-

-

-

U0293

○

○

○

Main Body ECU (Multiplex Network Body ECU)

U0100

○

○

○

U0101

○

○

○

U0120

-

-

-

U0126

○

○

○

U0129

○

○

○

U0151

○

○

○

U0155

-

-

-

U0163

-

-

-

U0164

-

-

-

U023A

-

-

-

U0293

-

-

-

U0327

-

-

-

U1106

○

○

○

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Bus 5

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

○

○

○

U0129

○

○

○

U0142

-

-

-

U0155

-

-

-

U0293

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

-

-

-

U0155

-

-

-

U0293

○

○

○

Combination Meter Assembly

U010087

○

○

○

U012987

○

○

○

U013187

○

○

○

U014087

-

-

-

U015187

○

○

○

U016387

-

-

-

U016487

-

-

-

U016887

-

-

-

U023387

-

-

-

U023A87

-

-

-

U029387

-

-

-

U110687

○

○

○

U111287

○

○

○

U113387

-

-

-

DTC COMBINATION TABLE (OPEN OR SHORT IN BUS 5, PAST COMMUNICATION ERROR)

(a) If DTCs indicating a past communication error of an ECU or sensor connected to Bus 5 are output (but the bus is normal when performing the CAN bus check), the probable area that had a malfunction can be determined based on the following DTC combination table.

HINT:

  • Based on the table below and DTCs output from ECUs connected via CAN communication, the probable part for which communication stop occurred can be determined.
  • If there is a communication error due to an open in a CAN branch line, the malfunctioning area can easily be determined by performing a CAN bus check using the Techstream to determine which ECU or sensor that is connected to the open branch line is not responding (the ECU or sensor has a background color of red).
  • ○: DTC is output.
  • -: DTC is not output.
  • *1: DTC U0073 may be stored when communication is lost.
  • *2: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.
  • If an open occurs in just one of the wires of a CAN branch line, DTCs which are not related to malfunctioning parts may be output (DTCs may be displayed randomly), or a message indicating a communication error may be displayed.
  • If an open occurs in just one of the wires of a CAN branch line, even if the values in the following tables are "-", DTCs which are not related to malfunctioning parts may be output, or a message indicating a communication error may be displayed.

-

Trouble Mode

Open in CAN branch line(s)

Output ECU

Output DTC

Air Conditioning Amplifier Communication Stop Mode

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Air Conditioning Amplifier Communication Stop Mode

Main Body ECU Communication Stop Mode

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Main Body ECU Communication Stop Mode

Certification ECU Communication Stop Mode

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Certification ECU Communication Stop Mode

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Forward Recognition Camera

U012587

-

-

-

U012687

-

-

-

U012987

-

-

-

U013187

-

-

-

U014087

-

○

-

U015587

-

-

-

U029387

-

-

-

U110687

-

-

-

Millimeter Wave Radar Sensor Assembly

-

-

-

-

Swing Grille Actuator Assembly

-

-

-

-

Blind Spot Monitor Sensor LH

U0125

-

-

-

U0126

-

-

-

U0129

-

-

-

U0142

-

○

-

U0293

-

-

-

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0100

-

-

-

U0110

-

-

-

U0120

-

-

○

U0293

-

-

-

Bus 2

Hybrid Vehicle Control ECU

U010087

-

-

-

U011087

-

-

-

U012287

-

-

-

U016487

○

-

-

U110787

-

-

○

U117087

-

-

-

U117587

-

-

-

ECM

U011087

-

-

-

U012987

-

-

-

U028487

-

-

-

U029387

-

-

-

U117587

-

-

-

U129387

-

-

-

Inverter with Converter Assembly

U010087

-

-

-

U029387

-

-

-

U117087

-

-

-

Vehicle Approaching Speaker Controller

U0129

-

-

-

U0140

-

○

-

U0293

-

-

-

Battery ECU Assembly

U010087

-

-

-

U029387

-

-

-

Bus 3

Radio and Display Receiver Assembly*1

U0100

-

-

-

U0129

-

-

-

U0140

-

○

-

U0155

-

-

-

U0164

○

-

-

U0198

-

-

-

U0293

-

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

DCM (Telematics Transceiver)

U014087

-

○

-

U015587

-

-

-

U016387

-

-

-

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

-

-

-

U0126

-

-

-

U0128

-

-

-

U0151

-

-

-

U0293

-

-

-

Brake Actuator Assembly*1

U0100

-

-

-

U0124

-

-

-

U0129

-

-

-

U0293

-

-

-

ECM

-

-

-

-

Occupant Detection ECU

U0125

-

-

-

U0129

-

-

-

Airbag Sensor Assembly

U0154

-

-

-

Bus 4

Hybrid Vehicle Control ECU

U010487

-

-

-

U012987

-

-

-

U014087

-

○

-

U015187

-

-

-

Power Steering ECU with Motor Assembly

U012687

-

-

-

U012987

-

-

-

U023A87

-

-

-

U029387

-

-

-

Steering Sensor

-

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

○

-

-

U0131

○

-

-

U0142

○

○

-

U0151

○

-

-

U0155

○

-

-

U0293

○

-

-

Main Body ECU (Multiplex Network Body ECU)

U0100

-

○

-

U0101

-

○

-

U0120

-

○

○

U0126

-

○

-

U0129

-

○

-

U0151

-

○

-

U0155

-

○

-

U0163

-

○

-

U0164

○

○

-

U023A

-

○

-

U0293

-

○

-

U0327

-

○

○

U1106

-

○

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

-

-

○

U0129

-

-

○

U0142

-

○

○

U0155

-

-

○

U0293

-

-

○

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

-

○

○

U0155

-

-

○

U0293

-

-

○

Bus 5

Combination Meter Assembly

U010087

-

-

-

U012987

-

-

-

U013187

-

-

-

U014087

-

○

-

U015187

-

-

-

U016387

-

-

-

U016487

○

-

-

U016887

-

-

○

U023387

-

-

-

U023A87

-

-

-

U029387

-

-

-

U110687

-

-

-

U111287

-

-

-

U113387

-

-

○

-

Trouble Mode

Open in CAN main bus line(s)

Output ECU

Output DTC

Central Gateway ECU (Network Gateway ECU)

Combination Meter ECU Communication Stop Mode

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Combination Meter ECU Communication Stop Mode

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Forward Recognition Camera

U012587

-

-

U012687

-

-

U012987

-

-

U013187

-

-

U014087

○

-

U015587

○

○

U029387

-

-

U110687

-

-

Millimeter Wave Radar Sensor Assembly

-

-

-

Swing Grille Actuator Assembly

-

-

-

Blind Spot Monitor Sensor LH

U0125

-

-

U0126

-

-

U0129

-

-

U0142

○

-

U0293

-

-

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0100

-

-

U0110

-

-

U0120

○

-

U0293

-

-

Bus 2

Hybrid Vehicle Control ECU

U010087

-

-

U011087

-

-

U012287

-

-

U016487

○

-

U110787

○

-

U117087

-

-

U117587

-

-

ECM

U011087

-

-

U012987

-

-

U028487

-

-

U029387

-

-

U117587

-

-

U129387

-

-

Inverter with Converter Assembly

U010087

-

-

U029387

-

-

U117087

-

-

Vehicle Approaching Speaker Controller

U0129

-

-

U0140

○

-

U0293

-

-

Battery ECU Assembly

U010087

-

-

U029387

-

-

Bus 3

Radio and Display Receiver Assembly*1

U0100

-

-

U0129

-

-

U0140

○

-

U0155

○

○

U0164

○

-

U0198

-

-

U0293

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

DCM (Telematics Transceiver)

U014087

○

-

U015587

○

○

U016387

-

-

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

-

-

U0126

-

-

U0128

-

-

U0151

○

○

U0293

-

-

Brake Actuator Assembly*1

U0100

-

-

U0124

-

-

U0129

-

-

U0293

-

-

ECM

-

-

-

Occupant Detection ECU

U0125

-

-

U0129

-

-

Airbag Sensor Assembly

U0154

-

-

Bus 4

Hybrid Vehicle Control ECU

U010487

-

-

U012987

-

-

U014087

○

-

U015187

-

-

Power Steering ECU with Motor Assembly

U012687

-

-

U012987

-

-

U023A87

-

-

U029387

-

-

Steering Sensor

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

○

-

U0131

○

-

U0142

-

-

U0151

○

-

U0155

-

○

U0293

○

-

Main Body ECU (Multiplex Network Body ECU)

U0100

○

-

U0101

○

-

U0120

-

-

U0126

○

-

U0129

○

-

U0151

○

-

U0155

-

○

U0163

○

-

U0164

-

-

U023A

○

-

U0293

○

-

U0327

-

-

U1106

○

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

○

-

U0129

○

-

U0142

-

-

U0155

-

○

U0293

○

-

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

-

-

U0155

-

○

U0293

○

-

Bus 5

Combination Meter Assembly

U010087

○

○

U012987

○

○

U013187

○

○

U014087

-

○

U015187

○

○

U016387

○

○

U016487

-

○

U016887

-

○

U023387

○

○

U023A87

○

○

U029387

○

○

U110687

○

○

U111287

○

○

U113387

-

○

-

Trouble Mode

CAN bus lines short circuit or short to GND

Output ECU

Output DTC

CANH to CANL

CANH Short to Ground

CANL Short to Ground

Bus 1

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Forward Recognition Camera

U012587

-

-

-

U012687

-

-

-

U012987

-

-

-

U013187

-

-

-

U014087

○

○

○

U015587

○

○

○

U029387

-

-

-

U110687

-

-

-

Millimeter Wave Radar Sensor Assembly

-

-

-

-

Swing Grille Actuator Assembly

-

-

-

-

Blind Spot Monitor Sensor LH

U0125

-

-

-

U0126

-

-

-

U0129

-

-

-

U0142

○

○

○

U0293

-

-

-

Bus 2

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0100

-

-

-

U0110

-

-

-

U0120

○

○

○

U0293

-

-

-

Bus 2

Hybrid Vehicle Control ECU

U010087

-

-

-

U011087

-

-

-

U012287

-

-

-

U016487

○

○

○

U110787

○

○

○

U117087

-

-

-

U117587

-

-

-

ECM

U011087

-

-

-

U012987

-

-

-

U028487

-

-

-

U029387

-

-

-

U117587

-

-

-

U129387

-

-

-

Inverter with Converter Assembly

U010087

-

-

-

U029387

-

-

-

U117087

-

-

-

Vehicle Approaching Speaker Controller

U0129

-

-

-

U0140

○

○

○

U0293

-

-

-

Battery ECU Assembly

U010087

-

-

-

U029387

-

-

-

Bus 3

Radio and Display Receiver Assembly*1

U0100

-

-

-

U0129

-

-

-

U0140

○

○

○

U0155

○

○

○

U0164

○

○

○

U0198

-

-

-

U0293

-

-

-

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

DCM (Telematics Transceiver)

U014087

○

○

○

U015587

○

○

○

U016387

-

-

-

Bus 4

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Brake Booster with Master Cylinder Assembly*1

U0124

-

-

-

U0126

-

-

-

U0128

-

-

-

U0151

○

○

○

U0293

-

-

-

Brake Actuator Assembly*1

U0100

-

-

-

U0124

-

-

-

U0129

-

-

-

U0293

-

-

-

ECM

-

-

-

-

Occupant Detection ECU

U0125

-

-

-

U0129

-

-

-

Airbag Sensor Assembly

U0154

-

-

-

Bus 4

Hybrid Vehicle Control ECU

U010487

-

-

-

U012987

-

-

-

U014087

○

○

○

U015187

-

-

-

Power Steering ECU with Motor Assembly

U012687

-

-

-

U012987

-

-

-

U023A87

-

-

-

U029387

-

-

-

Steering Sensor

-

-

-

-

Bus 5

Air Conditioning Amplifier Assembly

U0100

○

○

○

U0131

○

○

○

U0142

○

○

○

U0151

○

○

○

U0155

○

○

○

U0293

○

○

○

Main Body ECU (Multiplex Network Body ECU)

U0100

○

○

○

U0101

○

○

○

U0120

○

○

○

U0126

○

○

○

U0129

○

○

○

U0151

○

○

○

U0155

○

○

○

U0163

○

○

○

U0164

○

○

○

U023A

○

○

○

U0293

○

○

○

U0327

○

○

○

U1106

○

○

○

Central Gateway ECU (Network Gateway ECU)*2

-

-

-

-

Certification ECU (Smart Key ECU Assembly)

(Entry Function)

U0100

○

○

○

U0129

○

○

○

U0142

○

○

○

U0155

○

○

○

U0293

○

○

○

Certification ECU (Smart Key ECU Assembly)

(Power Source Switching Function)

U0140

○

○

○

U0155

○

○

○

U0293

○

○

○

Bus 5

Combination Meter Assembly

U010087

○

○

○

U012987

○

○

○

U013187

○

○

○

U014087

○

○

○

U015187

○

○

○

U016387

○

○

○

U016487

○

○

○

U016887

○

○

○

U023387

○

○

○

U023A87

○

○

○

U029387

○

○

○

U110687

○

○

○

U111287

○

○

○

U113387

○

○

○