Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001H0RC
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [01/2019 - 09/2022]
Title: CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM (for Gasoline Model): U010487; Lost Communication with Cruise Control Module Missing Message; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]

DTC

U010487

Lost Communication with Cruise Control Module Missing Message

DESCRIPTION

The millimeter wave radar sensor assembly communicates with the forward recognition camera via CAN communication.

If a communication error is detected between the forward recognition camera and millimeter wave radar sensor assembly, the millimeter wave radar sensor assembly stores this DTC.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

U010487

Lost Communication with Cruise Control Module Missing Message

Detection condition:

  • Ignition switch ON

Malfunction status:

  • Communication malfunction with the forward recognition camera is detected

Malfunction duration:

  • 10 seconds or more
  • CAN bus line
  • Forward recognition camera
  • Millimeter wave radar sensor assembly

Front Radar Sensor

Pattern

DTC output part name

(Display on Techstream)

Suspected Area (Malfunction Status)

Millimeter Wave Radar Sensor Assembly

(Front Radar Sensor)

Forward Recognition Camera

(Pre-Collision System)

U010487

U023587

○: DTC is output.

-: DTC is not output

Pattern 1

  • Open in CAN communication line (forward recognition camera - CAN junction connector)
  • Open in CAN communication line (millimeter wave radar sensor assembly - CAN junction connector)
  • CAN junction connector disconnected
  • CAN junction connector
  • Short in CAN communication line
  • Open or short in forward recognition camera internal circuit
  • Open or short in millimeter wave radar sensor assembly internal circuit

Pattern 2

-

  • Forward recognition camera connector disconnected
  • Forward recognition camera power supply circuit malfunction
  • Forward recognition camera internal malfunction
  • Millimeter wave radar sensor assembly internal malfunction

HINT:

If the DTCs are output simultaneously, the inspection area can be narrowed down.

WIRING DIAGRAM

for Sedan:
for Hatchback:

CAUTION / NOTICE / HINT

NOTICE:

  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2019]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2019 - 04/2020]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION 2021 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [04/2020 - 09/2022]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION

  • When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle and a DTC may be stored.
  • When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the millimeter wave radar sensor beam axis must be performed.

    Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT

  • When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle and a DTC may be stored.
  • If the forward recognition camera has been replaced with a new one, forward recognition camera adjustment must be performed.

    HINT:

    Forward recognition camera adjustment can be performed by using either One Time Recognition or Sequential Recognition.

    One Time Recognition: Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; CRUISE CONTROL: FRONT CAMERA: ADJUSTMENT (ONE TIME RECOGNITION)

    Sequential Recognition: Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; CRUISE CONTROL: FRONT CAMERA: ADJUSTMENT (SEQUENTIAL RECOGNITION)

PROCEDURE

1.

CHECK VEHICLE TYPE

(a) Check vehicle type.

Result

Proceed to

for Sedan

A

for Hatchback

B

B

GO TO STEP 8

A

2.

CHECK FOR DTCs

(a) Check for pre-collision system DTCs.

Body Electrical > Pre-Collision System > Trouble Codes

Result

Proceed to

DTC U023587 is output

A

DTC U023587 is not output

B

B

GO TO STEP 5

A

3.

CHECK CAN BUS LINES

(a) Disconnect the T9 forward recognition camera connector.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Forward Recognition Camera)

-

-

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

T9-6 (CANH) - T9-12 (CANL)

Cable disconnected from negative (-) battery terminal

108 to 132Ω

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

T9-6 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) battery terminal

200 Ω or higher

T9-12 (CANL) - I26-4 (CG)

Cable disconnected from negative (-) battery terminal

200 Ω or higher

T9-6 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) battery terminal

6 kΩ or higher

T9-12 (CANL) - I26-16 (BAT)

Cable disconnected from negative (-) battery terminal

6 kΩ or higher

(d) Connect the T9 forward recognition camera connector.

OK

REPLACE FORWARD RECOGNITION CAMERA

NG

4.

CHECK CAN BUS LINES

(a) Disconnect the A1 millimeter wave radar sensor assembly connector.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Millimeter Wave Radar Sensor Assembly)

-

-

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A1-5 (CA1P) - A1-6 (CA1N)

Cable disconnected from negative (-) battery terminal

108 to 132Ω

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A1-5 (CA1P) - I26-4 (CG)

Cable disconnected from negative (-) battery terminal

200 Ω or higher

A1-6 (CA1N) - I26-4 (CG)

Cable disconnected from negative (-) battery terminal

200 Ω or higher

A1-5 (CA1P) - I26-16 (BAT)

Cable disconnected from negative (-) battery terminal

6 kΩ or higher

A1-6 (CA1N) - I26-16 (BAT)

Cable disconnected from negative (-) battery terminal

6 kΩ or higher

(d) Connect the A1 millimeter wave radar sensor assembly connector.

OK

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

NG

REPAIR OR REPLACE CAN BUS MAIN LINE OR CONNECTOR

5.

CHECK CONNECTOR (FORWARD RECOGNITION CAMERA)

(a) Check the locking part and terminals of the forward recognition camera connector.

NOTICE:

  • Make sure the connector is not loose or disconnected.
  • Make sure that the connector and terminals are not deformed or corroded.

OK:

The connector and terminals are normal.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (FORWARD RECOGNITION CAMERA POWER SOURCE CIRCUIT)

OK

6.

CHECK HARNESS AND CONNECTOR (FORWARD RECOGNITION CAMERA POWER SOURCE CIRCUIT)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the T9 forward recognition camera connector.

*a

Front view of wire harness connector

(to Forward Recognition Camera)

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

T9-10 (GND) - Body ground

Always

Below 1 Ω

(d) Connect the cable to the negative (-) battery terminal.

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

T9-7 (IGB) - Body ground

Ignition switch ON

11 to 14 V

(f) Connect the T9 forward recognition camera connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (FORWARD RECOGNITION CAMERA POWER SOURCE CIRCUIT)

OK

7.

INSPECT FORWARD RECOGNITION CAMERA (WAVEFORM)

(a) Turn the ignition switch off.

(b) Disconnect the A1 millimeter wave radar sensor assembly connector.

(c) Turn the ignition switch to ON.

(d) Using an oscilloscope, measure the waveform at A1 millimeter wave radar sensor assembly connector..

*a

Front view of wire harness connector

(to Millimeter Wave Radar Sensor Assembly)

*b

Waveform

Measurement Condition:

Tester Connection

Condition

Tool Setting

A1-5 (CA1P) - Body ground

Ignition switch ON

1 V/DIV., 100 μs/DIV.

NOTICE:

The oscilloscope waveform is for reference only and does not include noise, fluctuations, etc.

OK:

A waveform similar to that in the illustration can be observed.

(e) Connect the A1 millimeter wave radar sensor assembly connector.

OK

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

NG

REPLACE FORWARD RECOGNITION CAMERA

8.

CHECK FOR DTCs

(a) Check for pre-collision system DTCs.

Body Electrical > Pre-Collision System > Trouble Codes

Result

Proceed to

DTC U023587 is output

A

DTC U023587 is not output

B

B

GO TO STEP 12

A

9.

CHECK CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the I108 No. 2 CAN junction connector.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

*b

to Forward Recognition Camera

*c

to Millimeter Wave Radar Sensor Assembly

-

-

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

Connected to

I108-6 - I108-17

Cable disconnected from negative (-) battery terminal

108 to 132 Ω

Forward Recognition Camera

I108-4 - I108-15

Cable disconnected from negative (-) battery terminal

108 to 132 Ω

Millimeter Wave Radar Sensor Assembly

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

Connected to

I108-6 - I26-4(CG)

Cable disconnected from negative (-) battery terminal

200 Ω or higher

Forward Recognition Camera

I108-17 - I26-4(CG)

Cable disconnected from negative (-) battery terminal

200 Ω or higher

I108-6 - I26-16(BAT)

Cable disconnected from negative (-) battery terminal

6 kΩ or higher

I108-17 - I26-16(BAT)

Cable disconnected from negative (-) battery terminal

6 kΩ or higher

I108-4 - I26-4(CG)

Cable disconnected from negative (-) battery terminal

200 Ω or higher

Millimeter Wave Radar Sensor Assembly

I108-15 - I26-4(CG)

Cable disconnected from negative (-) battery terminal

200 Ω or higher

I108-4 - I26-16(BAT)

Cable disconnected from negative (-) battery terminal

6 kΩ or higher

I108-15 - I26-16(BAT)

Cable disconnected from negative (-) battery terminal

6 kΩ or higher

(e) Connect the I108 No. 2 CAN junction connector.

Result

Proceed to

OK

A

NG (Connected to: Forward Recognition Camera)

B

NG (Connected to: Millimeter Wave Radar Sensor Assembly)

C

A

REPLACE NO. 2 CAN JUNCTION CONNECTOR

C

GO TO STEP 11

B

10.

CHECK CAN BUS LINES (FORWARD RECOGNITION CAMERA - NO. 2 CAN JUNCTION CONNECTOR)

(a) Disconnect the T9 forward recognition camera connector.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Forward Recognition Camera)

-

-

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

T9-6 (CANH) - T9-12 (CANL)

Cable disconnected from negative (-) battery terminal

108 to 132Ω

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

T9-6 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) battery terminal

200 Ω or higher

T9-12 (CANL) - I26-4 (CG)

Cable disconnected from negative (-) battery terminal

200 Ω or higher

T9-6 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) battery terminal

6 kΩ or higher

T9-12 (CANL) - I26-16 (BAT)

Cable disconnected from negative (-) battery terminal

6 kΩ or higher

(d) Connect the T9 forward recognition camera connector.

OK

REPLACE FORWARD RECOGNITION CAMERA

NG

REPAIR OR REPLACE CAN BUS MAIN LINE OR CONNECTOR (FORWARD RECOGNITION CAMERA - NO. 2 CAN JUNCTION CONNECTOR)

11.

CHECK CAN BUS LINES (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - NO. 2 CAN JUNCTION CONNECTOR)

(a) Disconnect the A1 millimeter wave radar sensor assembly connector.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Millimeter Wave Radar Sensor Assembly)

-

-

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A1-5 (CA1P) - A1-6 (CA1N)

Cable disconnected from negative (-) battery terminal

108 to 132Ω

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A1-5 (CA1P) - I26-4 (CG)

Cable disconnected from negative (-) battery terminal

200 Ω or higher

A1-6 (CA1N) - I26-4 (CG)

Cable disconnected from negative (-) battery terminal

200 Ω or higher

A1-5 (CA1P) - I26-16 (BAT)

Cable disconnected from negative (-) battery terminal

6 kΩ or higher

A1-6 (CA1N) - I26-16 (BAT)

Cable disconnected from negative (-) battery terminal

6 kΩ or higher

(d) Connect the A1 millimeter wave radar sensor assembly connector.

OK

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

NG

REPAIR OR REPLACE CAN BUS MAIN LINE OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - NO. 2 CAN JUNCTION CONNECTOR)

12.

CHECK CONNECTOR (FORWARD RECOGNITION CAMERA)

(a) Check the locking part and terminals of the forward recognition camera connector.

NOTICE:

  • Make sure the connector is not loose or disconnected.
  • Make sure that the connector and terminals are not deformed or corroded.

OK:

The connector and terminals are normal.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (FORWARD RECOGNITION CAMERA)

OK

13.

CHECK HARNESS AND CONNECTOR (FORWARD RECOGNITION CAMERA POWER SOURCE CIRCUIT)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the T9 forward recognition camera connector.

*a

Front view of wire harness connector

(to Forward Recognition Camera)

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

T9-10 (GND) - Body ground

Always

Below 1 Ω

(d) Connect the cable to the negative (-) battery terminal.

(e) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

T9-7 (IGB) - Body ground

Ignition switch ON

11 to 14 V

(f) Connect the T9 forward recognition camera connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (FORWARD RECOGNITION CAMERA POWER SOURCE CIRCUIT)

OK

14.

INSPECT FORWARD RECOGNITION CAMERA (WAVEFORM)

(a) Turn the ignition switch off.

(b) Disconnect the I108 No. 2 CAN junction connector.

(c) Turn the ignition switch to ON.

(d) Using an oscilloscope, measure the waveform at I108 No. 2 CAN junction connector.

*a

Front view of wire harness connector

(to No. 2 CAN Junction Connector)

*b

Waveform

*c

to Forward Recognition Camera

-

-

Measurement Condition:

Tester Connection

Condition

Tool Setting

I108-6 - Body ground

Ignition switch ON

1 V/DIV., 100 μs/DIV.

NOTICE:

The oscilloscope waveform is for reference only and does not include noise, fluctuations, etc.

OK:

A waveform similar to that in the illustration can be observed.

(e) Connect the I108 No. 2 CAN junction connector.

OK

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

NG

REPLACE FORWARD RECOGNITION CAMERA