Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028US4
Model Year Start: 2023 Model: Corolla Prod Date Range: [11/2022 -           ]
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Check Bus 1 Line; 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]

Check Bus 1 Line

DESCRIPTION

Symptom

Trouble Area

There are ECUs or sensors that display a communication stop on the bus diagnostic screen. Or, there are ECUs or sensors that display communication stop history on the "Detail" screen.

  • CAN main bus line, CAN branch line or connector
  • Central gateway ECU (network gateway ECU)
  • Forward recognition camera

    (w/ Front Camera System)

  • Millimeter wave radar sensor assembly

    (w/ Front Camera System)

  • Blind spot monitor sensor LH (B)

    (w/ Blind Spot Monitor System)

  • No. 18 CAN junction connector
  • No. 19 CAN junction connector
  • CAN junction terminal

WIRING DIAGRAM

w/o Front Camera System with Blind Spot Monitor System
w/ Front Camera System

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

NOTICE:

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

    Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
  • After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: BEFORE DISCONNECTING BATTERY

  • When disconnecting and reconnecting the auxiliary battery.

    HINT:

    When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: AUTOMATIC LEARNING CHART

  • Some parts must be initialized and set when replacing or removing and installing parts.

    Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - 03/2023]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: WORK PROCEDURE 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2023 - 08/2023]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: WORK PROCEDURE 2024 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [08/2023 -        ]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: WORK PROCEDURE

  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

    DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.

  • After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.

    Click here 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM

HINT:

  • Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
  • When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

PROCEDURE

1.

CHECK FOR OPEN IN CAN MAIN BUS LINES

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I173-28 (CA1H) - I173-27 (CA1L)

Cable disconnected from negative (-) auxiliary battery terminal

Below 70 Ω

*a

Component with harness connected

(Central Gateway ECU (Network Gateway ECU))

NG

GO TO STEP 50

OK

2.

CHECK FOR SHORT IN CAN BUS LINES

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I173-28 (CA1H) - I173-27 (CA1L)

Cable disconnected from negative (-) auxiliary battery terminal

54 Ω or higher

*a

Component with harness connected

(Central Gateway ECU (Network Gateway ECU))

NG

GO TO STEP 35

OK

3.

CHECK FOR SHORT TO +B IN CAN BUS LINE

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

*1

DLC3

-

-

*a

Component with harness connected

(Central Gateway ECU (Network Gateway ECU))

-

-

Standard Resistance:

Tester Connection

Condition

Specified Condition

I173-28 (CA1H) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I173-27 (CA1L) - I26-16 (BAT)

NG

GO TO STEP 20

OK

4.

CHECK FOR SHORT TO GND IN CAN BUS LINE

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

*1

DLC3

-

-

*a

Component with harness connected

(Central Gateway ECU (Network Gateway ECU))

-

-

Standard Resistance:

Tester Connection

Condition

Specified Condition

I173-28 (CA1H) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-27 (CA1L) - I26-4 (CG)

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

5.

CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 18 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I192 No. 18 CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 18 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

I192-3 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I192-7 (CANL) - I26-4 (CG)

NG

GO TO STEP 7

OK

6.

CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 18 CAN JUNCTION CONNECTOR - FORWARD RECOGNITION CAMERA OR NO. 19 CAN JUNCTION CONNECTOR)

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 18 CAN Junction Connector)

*b

to Forward Recognition Camera or No. 19 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

I192-2 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I192-6 (CANL) - I26-4 (CG)

OK

REPLACE NO. 18 CAN JUNCTION CONNECTOR

NG

GO TO STEP 8

7.

CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 18 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 18 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

I192-3 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I192-7 (CANL) - I26-4 (CG)

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 18 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

8.

CHECK VEHICLE TYPE

(a) Check vehicle type.

Result

Proceed to

w/o Front Camera System

A

w/ Front Camera System

B

B

GO TO STEP 10

A

9.

CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 19 CAN JUNCTION CONNECTOR - NO. 18 CAN JUNCTION CONNECTOR)

(a) Disconnect the O203 No. 19 CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to No. 18 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-1 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O203-5 (CANL) - I26-4 (CG)

OK

GO TO STEP 15

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 19 CAN JUNCTION CONNECTOR - NO. 18 CAN JUNCTION CONNECTOR)

10.

CHECK FOR SHORT TO GND IN CAN BUS LINE (FORWARD RECOGNITION CAMERA - NO. 18 CAN JUNCTION CONNECTOR)

(a) Disconnect the T21 forward recognition camera connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Forward Recognition Camera)

*b

to No. 18 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

T21-2 (CA2P) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

T21-1 (CA2L) - I26-4 (CG)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (FORWARD RECOGNITION CAMERA - NO. 18 CAN JUNCTION CONNECTOR)

OK

11.

CHECK FOR SHORT TO GND IN CAN BUS LINE (FORWARD RECOGNITION CAMERA - MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Forward Recognition Camera)

*b

to Millimeter Wave Radar Sensor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

T21-10 (CA1P) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

T21-9 (CA1N) - I26-4 (CG)

OK

REPLACE FORWARD RECOGNITION CAMERA

NG

12.

CHECK FOR SHORT TO GND IN CAN BUS LINE (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - FORWARD RECOGNITION CAMERA)

(a) Disconnect the A128 millimeter wave radar sensor assembly connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Millimeter Wave Radar Sensor Assembly)

*b

to Forward Recognition Camera

Standard Resistance:

Tester Connection

Condition

Specified Condition

A128-10 (CA3H) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A128-9 (CA3L) - I26-4 (CG)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - FORWARD RECOGNITION CAMERA)

OK

13.

CHECK FOR SHORT TO GND IN CAN BUS LINE (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - NO. 19 CAN JUNCTION CONNECTOR)

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Millimeter Wave Radar Sensor Assembly)

*b

to No. 19 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

A128-4 (CA2H) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A128-3 (CA2L) - I26-4 (CG)

OK

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

NG

14.

CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 19 CAN JUNCTION CONNECTOR - MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

(a) Disconnect the O203 No. 19 CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to Millimeter Wave Radar Sensor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-1 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O203-5 (CANL) - I26-4 (CG)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 19 CAN JUNCTION CONNECTOR - MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

OK

15.

CHECK VEHICLE TYPE

(a) Check vehicle type.

Result

Proceed to

w/ Blind Spot Monitor System

A

w/o Blind Spot Monitor System

B

B

GO TO STEP 17

A

16.

CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 19 CAN JUNCTION CONNECTOR - BLIND SPOT MONITOR SENSOR LH (B))

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to Blind Spot Monitor Sensor LH (B)

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-3 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O203-7 (CANL) - I26-4 (CG)

NG

GO TO STEP 18

OK

17.

CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 19 CAN JUNCTION CONNECTOR - CAN JUNCTION TERMINAL)

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to CAN Junction Terminal

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-2 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O203-6 (CANL) - I26-4 (CG)

OK

REPLACE NO. 19 CAN JUNCTION CONNECTOR

NG

GO TO STEP 19

18.

CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 19 CAN JUNCTION CONNECTOR - BLIND SPOT MONITOR SENSOR LH (B))

(a) Disconnect the O57 blind spot monitor sensor LH (B) connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to Blind Spot Monitor Sensor LH (B)

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-3 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O203-7 (CANL) - I26-4 (CG)

OK

REPLACE BLIND SPOT MONITOR SENSOR LH (B)

NG

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 19 CAN JUNCTION CONNECTOR - BLIND SPOT MONITOR SENSOR LH (B))

19.

CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 19 CAN JUNCTION CONNECTOR - CAN JUNCTION TERMINAL)

(a) Disconnect the O95 CAN junction terminal connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to CAN Junction Terminal

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-2 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

O203-6 (CANL) - I26-4 (CG)

OK

REPLACE CAN JUNCTION TERMINAL

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 19 CAN JUNCTION CONNECTOR - CAN JUNCTION TERMINAL)

20.

CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 18 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I192 No. 18 CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 18 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

I192-3 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I192-7 (CANL) - I26-16 (BAT)

NG

GO TO STEP 22

OK

21.

CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 18 CAN JUNCTION CONNECTOR - FORWARD RECOGNITION CAMERA OR NO. 19 CAN JUNCTION CONNECTOR)

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 18 CAN Junction Connector)

*b

to Forward Recognition Camera or No. 19 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

I192-2 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I192-6 (CANL) - I26-16 (BAT)

OK

REPLACE NO. 18 CAN JUNCTION CONNECTOR

NG

GO TO STEP 23

22.

CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 18 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 18 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

I192-3 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I192-7 (CANL) - I26-16 (BAT)

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 18 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

23.

CHECK VEHICLE TYPE

(a) Check vehicle type.

Result

Proceed to

w/o Front Camera System

A

w/ Front Camera System

B

B

GO TO STEP 25

A

24.

CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 19 CAN JUNCTION CONNECTOR - NO. 18 CAN JUNCTION CONNECTOR)

(a) Disconnect the O203 No. 19 CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to No. 18 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-1 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

O203-5 (CANL) - I26-16 (BAT)

OK

GO TO STEP 30

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 19 CAN JUNCTION CONNECTOR - NO. 18 CAN JUNCTION CONNECTOR)

25.

CHECK FOR SHORT TO +B IN CAN BUS LINE (FORWARD RECOGNITION CAMERA - NO. 18 CAN JUNCTION CONNECTOR)

(a) Disconnect the T21 forward recognition camera connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Forward Recognition Camera)

*b

to No. 18 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

T21-2 (CA2P) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

T21-1 (CA2L) - I26-16 (BAT)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (FORWARD RECOGNITION CAMERA - NO. 18 CAN JUNCTION CONNECTOR)

OK

26.

CHECK FOR SHORT TO +B IN CAN BUS LINE (FORWARD RECOGNITION CAMERA - MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Forward Recognition Camera)

*b

to Millimeter Wave Radar Sensor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

T21-10 (CA1P) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

T21-9 (CA1N) - I26-16 (BAT)

OK

REPLACE FORWARD RECOGNITION CAMERA

NG

27.

CHECK FOR SHORT TO +B IN CAN BUS LINE (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - FORWARD RECOGNITION CAMERA)

(a) Disconnect the A128 millimeter wave radar sensor assembly connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Millimeter Wave Radar Sensor Assembly)

*b

to Forward Recognition Camera

Standard Resistance:

Tester Connection

Condition

Specified Condition

A128-10 (CA3H) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A128-9 (CA3L) - I26-16 (BAT)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - FORWARD RECOGNITION CAMERA)

OK

28.

CHECK FOR SHORT TO +B IN CAN BUS LINE (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - NO. 19 CAN JUNCTION CONNECTOR)

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Millimeter Wave Radar Sensor Assembly)

*b

to No. 19 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

A128-4 (CA2H) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A128-3 (CA2L) - I26-16 (BAT)

OK

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

NG

29.

CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 19 CAN JUNCTION CONNECTOR - MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

(a) Disconnect the O203 No. 19 CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to Millimeter Wave Radar Sensor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-1 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

O203-5 (CANL) - I26-16 (BAT)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 19 CAN JUNCTION CONNECTOR - MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

OK

30.

CHECK VEHICLE TYPE

(a) Check vehicle type.

Result

Proceed to

w/ Blind Spot Monitor System

A

w/o Blind Spot Monitor System

B

B

GO TO STEP 32

A

31.

CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 19 CAN JUNCTION CONNECTOR - BLIND SPOT MONITOR SENSOR LH (B))

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to Blind Spot Monitor Sensor LH (B)

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-3 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

O203-7 (CANL) - I26-16 (BAT)

NG

GO TO STEP 33

OK

32.

CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 19 CAN JUNCTION CONNECTOR - CAN JUNCTION TERMINAL)

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to CAN Junction Terminal

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-2 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

O203-6 (CANL) - I26-16 (BAT)

OK

REPLACE NO. 19 CAN JUNCTION CONNECTOR

NG

GO TO STEP 34

33.

CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 19 CAN JUNCTION CONNECTOR - BLIND SPOT MONITOR SENSOR LH (B))

(a) Disconnect the O57 blind spot monitor sensor LH (B) connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to Blind Spot Monitor Sensor LH (B)

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-3 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

O203-7 (CANL) - I26-16 (BAT)

OK

REPLACE BLIND SPOT MONITOR SENSOR LH (B)

NG

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 19 CAN JUNCTION CONNECTOR - BLIND SPOT MONITOR SENSOR LH (B))

34.

CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 19 CAN JUNCTION CONNECTOR - CAN JUNCTION TERMINAL)

(a) Disconnect the O95 CAN junction terminal connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to CAN Junction Terminal

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-2 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

O203-6 (CANL) - I26-16 (BAT)

OK

REPLACE CAN JUNCTION TERMINAL

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 19 CAN JUNCTION CONNECTOR - CAN JUNCTION TERMINAL)

35.

CHECK FOR SHORT IN CAN BUS LINES (NO. 18 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I192 No. 18 CAN junction connector.

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

*a

Front view of wire harness connector

(to No. 18 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

I192-3 (CANH) - I192-7 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

NG

GO TO STEP 37

OK

36.

CHECK FOR SHORT IN CAN BUS LINES (NO. 18 CAN JUNCTION CONNECTOR - FORWARD RECOGNITION CAMERA OR NO. 19 CAN JUNCTION CONNECTOR)

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

*a

Front view of wire harness connector

(to No. 18 CAN Junction Connector)

*b

to Forward Recognition Camera or No. 19 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

I192-2 (CANH) - I192-6 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

OK

REPLACE NO. 18 CAN JUNCTION CONNECTOR

NG

GO TO STEP 38

37.

CHECK FOR SHORT IN CAN BUS LINES (NO. 18 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

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

*a

Front view of wire harness connector

(to No. 18 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

I192-3 (CANH) - I192-7 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

1 MΩ or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 18 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

38.

CHECK VEHICLE TYPE

(a) Check vehicle type.

Result

Proceed to

w/o Front Camera System

A

w/ Front Camera System

B

B

GO TO STEP 40

A

39.

CHECK FOR SHORT IN CAN BUS LINES (NO. 19 CAN JUNCTION CONNECTOR - NO. 18 CAN JUNCTION CONNECTOR)

(a) Reconnect the I192 No. 18 CAN junction connector.

(b) Disconnect the O203 No. 19 CAN junction connector.

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

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to No. 18 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-1 (CANH) - O203-5 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

OK

GO TO STEP 45

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 19 CAN JUNCTION CONNECTOR - NO. 18 CAN JUNCTION CONNECTOR)

40.

CHECK FOR SHORT IN CAN BUS LINES (FORWARD RECOGNITION CAMERA - NO. 18 CAN JUNCTION CONNECTOR)

(a) Reconnect the I192 No. 18 CAN junction connector.

(b) Disconnect the T21 forward recognition camera connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

T21-2 (CA2P) - T21-1 (CA2L)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

*a

Front view of wire harness connector

(to Forward Recognition Camera)

*b

to No. 18 CAN Junction Connector

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (FORWARD RECOGNITION CAMERA - NO. 18 CAN JUNCTION CONNECTOR)

OK

41.

CHECK FOR SHORT IN CAN BUS LINES (FORWARD RECOGNITION CAMERA - MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

T21-10 (CA1P) - T21-9 (CA1N)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

*a

Front view of wire harness connector

(to Forward Recognition Camera)

*b

to Millimeter Wave Radar Sensor Assembly

OK

REPLACE FORWARD RECOGNITION CAMERA

NG

42.

CHECK FOR SHORT IN CAN BUS LINES (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - FORWARD RECOGNITION CAMERA)

(a) Reconnect the T21 forward recognition camera connector.

(b) Disconnect the A128 millimeter wave radar sensor assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A128-10 (CA3H) - A128-9 (CA3L)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

*a

Front view of wire harness connector

(to Millimeter Wave Radar Sensor Assembly)

*b

to Forward Recognition Camera

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - FORWARD RECOGNITION CAMERA)

OK

43.

CHECK FOR SHORT IN CAN BUS LINES (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - NO. 19 CAN JUNCTION CONNECTOR)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A128-4 (CA2H) - A128-3 (CA2L)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

*a

Front view of wire harness connector

(to Millimeter Wave Radar Sensor Assembly)

*b

to No. 19 CAN Junction Connector

OK

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

NG

44.

CHECK FOR SHORT IN CAN BUS LINES (NO. 19 CAN JUNCTION CONNECTOR - MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

(a) Reconnect the A128 millimeter wave radar sensor assembly connector.

(b) Disconnect the O203 No. 19 CAN junction connector.

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

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to Millimeter Wave Radar Sensor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-1 (CANH) - O203-5 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 19 CAN JUNCTION CONNECTOR - MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

OK

45.

CHECK VEHICLE TYPE

(a) Check vehicle type.

Result

Proceed to

w/ Blind Spot Monitor System

A

w/o Blind Spot Monitor System

B

B

GO TO STEP 47

A

46.

CHECK FOR SHORT IN CAN BUS LINES (NO. 19 CAN JUNCTION CONNECTOR - BLIND SPOT MONITOR SENSOR LH (B))

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

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to Blind Spot Monitor Sensor LH (B)

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-3 (CANH) - O203-7 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

NG

GO TO STEP 48

OK

47.

CHECK FOR SHORT IN CAN BUS LINES (NO. 19 CAN JUNCTION CONNECTOR - CAN JUNCTION TERMINAL)

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

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to CAN Junction Terminal

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-2 (CANH) - O203-6 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

OK

REPLACE NO. 19 CAN JUNCTION CONNECTOR

NG

GO TO STEP 49

48.

CHECK FOR SHORT IN CAN BUS LINES (NO. 19 CAN JUNCTION CONNECTOR - BLIND SPOT MONITOR SENSOR LH (B))

(a) Disconnect the O57 blind spot monitor sensor LH (B) connector.

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

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to Blind Spot Monitor Sensor LH (B)

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-3 (CANH) - O203-7 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

1 MΩ or higher

OK

REPLACE BLIND SPOT MONITOR SENSOR LH (B)

NG

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 19 CAN JUNCTION CONNECTOR - BLIND SPOT MONITOR SENSOR LH (B))

49.

CHECK FOR SHORT IN CAN BUS LINES (NO. 19 CAN JUNCTION CONNECTOR - CAN JUNCTION TERMINAL)

(a) Disconnect the O95 CAN junction terminal connector.

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

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to CAN Junction Terminal

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-2 (CANH) - O203-6 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

1 MΩ or higher

OK

REPLACE CAN JUNCTION TERMINAL

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 19 CAN JUNCTION CONNECTOR - CAN JUNCTION TERMINAL)

50.

CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I173-28 (CA1H) - I173-27 (CA1L)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

*a

Front view of wire harness connector

(to Central Gateway ECU (Network Gateway ECU))

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

51.

CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 18 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Reconnect the I173 central gateway ECU (network gateway ECU) connector.

(b) Disconnect the I192 No. 18 CAN junction connector.

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

*a

Front view of wire harness connector

(to No. 18 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

I192-3 (CANH) - I192-7 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 18 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

OK

52.

CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 18 CAN JUNCTION CONNECTOR - FORWARD RECOGNITION CAMERA OR NO. 19 CAN JUNCTION CONNECTOR)

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

*a

Front view of wire harness connector

(to No. 18 CAN Junction Connector)

*b

to Forward Recognition Camera or No. 19 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

I192-2 (CANH) - I192-6 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

OK

REPLACE NO. 18 CAN JUNCTION CONNECTOR

NG

53.

CHECK VEHICLE TYPE

(a) Check vehicle type.

Result

Proceed to

w/o Front Camera System

A

w/ Front Camera System

B

B

GO TO STEP 55

A

54.

CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 19 CAN JUNCTION CONNECTOR - NO. 18 CAN JUNCTION CONNECTOR)

(a) Reconnect the I192 No. 18 CAN junction connector.

(b) Disconnect the O203 No. 19 CAN junction connector.

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

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to No. 18 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-1 (CANH) - O203-5 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

OK

GO TO STEP 60

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 19 CAN JUNCTION CONNECTOR - NO. 18 CAN JUNCTION CONNECTOR)

55.

CHECK FOR OPEN IN CAN MAIN BUS LINES (FORWARD RECOGNITION CAMERA - NO. 18 CAN JUNCTION CONNECTOR)

(a) Reconnect the I192 No. 18 CAN junction connector.

(b) Disconnect the T21 forward recognition camera connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

T21-2 (CA2P) - T21-1 (CA2L)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

*a

Front view of wire harness connector

(to Forward Recognition Camera)

*b

to No. 18 CAN Junction Connector

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (FORWARD RECOGNITION CAMERA - NO. 18 CAN JUNCTION CONNECTOR)

OK

56.

CHECK FOR OPEN IN CAN MAIN BUS LINES (FORWARD RECOGNITION CAMERA - MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

T21-10 (CA1P) - T21-9 (CA1N)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

*a

Front view of wire harness connector

(to Forward Recognition Camera)

*b

to Millimeter Wave Radar Sensor Assembly

OK

REPLACE FORWARD RECOGNITION CAMERA

NG

57.

CHECK FOR OPEN IN CAN MAIN BUS LINES (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - FORWARD RECOGNITION CAMERA)

(a) Reconnect the T21 forward recognition camera connector.

(b) Disconnect the A128 millimeter wave radar sensor assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A128-10 (CA3H) - A128-9 (CA3L)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

*a

Front view of wire harness connector

(to Millimeter Wave Radar Sensor Assembly)

*b

to Forward Recognition Camera

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - FORWARD RECOGNITION CAMERA)

OK

58.

CHECK FOR OPEN IN CAN MAIN BUS LINES (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - NO. 19 CAN JUNCTION CONNECTOR)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A128-4 (CA2H) - A128-3 (CA2L)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

*a

Front view of wire harness connector

(to Millimeter Wave Radar Sensor Assembly)

*b

to No. 19 CAN Junction Connector

OK

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

NG

59.

CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 19 CAN JUNCTION CONNECTOR - MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

(a) Reconnect the A128 millimeter wave radar sensor assembly connector.

(b) Disconnect the O203 No. 19 CAN junction connector.

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

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to Millimeter Wave Radar Sensor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-1 (CANH) - O203-5 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 19 CAN JUNCTION CONNECTOR - MILLIMETER WAVE RADAR SENSOR ASSEMBLY)

OK

60.

CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 19 CAN JUNCTION CONNECTOR - CAN JUNCTION TERMINAL)

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

*a

Front view of wire harness connector

(to No. 19 CAN Junction Connector)

*b

to CAN Junction Terminal

Standard Resistance:

Tester Connection

Condition

Specified Condition

O203-2 (CANH) - O203-6 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

OK

REPLACE NO. 19 CAN JUNCTION CONNECTOR

NG

61.

CHECK FOR OPEN IN CAN MAIN BUS LINES (CAN JUNCTION TERMINAL)

(a) Reconnect the O203 No. 19 CAN junction connector.

(b) Disconnect the O95 CAN junction terminal connector.

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

*a

Front view of wire harness connector

(to CAN Junction Terminal)

*b

to No. 19 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

O95-3 (CANH) - O95-2 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

OK

REPLACE CAN JUNCTION TERMINAL

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN JUNCTION TERMINAL - NO. 19 CAN JUNCTION CONNECTOR)