Body CAN communication circuit inspection (Central GateWay)

1. Body control system check

Refer to "64.Body Control 10I.Troubleshooting(Central GateWay) diagnostic system check - central gateway controls".

2. Scan tool communication verification

1) Connect the scan tool.

2) Turn ON the ignition switch.

3) Check the vehicle specifications and verify the status of communication with the following control modules using a scan tool. Can communication with any of the control modules be established?

Yes

=>Go to Control panel communication verification.

No

=>Go to Control panel inspection.

3. Control panel communication verification

1) Verify that communication can be established with the control panel using a scan tool. Can communication with the control panel be established?

Yes

=>Go to Instrument panel cluster communication verification.

No

Go to Lost communication with the automatic air conditioning control unit.

Refer to "57.HVAC Control 7A.Troubleshooting(Auto A/C) lost communication with the control panel (models with radar sensor/ stereo camera)".

4. Instrument panel cluster communication verification

1) Verify the communication status with the instrument panel cluster using the scan tool. Is communication with the instrument panel cluster established?

Yes

=>Go to BCM communication verification.

No

=>Go to Instrument panel cluster power supply and ground circuit inspection.

5. BCM communication verification

1) Check the communication status with the BCM using the scan tool. Is communication with the BCM established?

Yes

=>Go to Wireless access module communication verification.

No

Go to Lost communication with the BCM.

Refer to "64.Body Control 10I.Troubleshooting(BCM) lost communication with the BCM (models with radar sensor/ stereo camera)".

6. Wireless access module communication verification

1) Verify that communication can be established with the wireless access module using a scan tool. Can communication with the wireless access module be established?

Yes

=>Go to Headlight auto leveling control unit communication verification.

No

Go to Lost communication with the wireless access module.

Refer to "71.Security and Locks Control 10S.Troubleshooting(Wireless Access Module (Hi-version [Passive Entry and Start System])) Lost communication with the Wireless Access Module (Hi-version[Passive Entry and Start System]) (models with radar sensor/ stereo camera)".

Refer to "71.Security and Locks Control 10S.Troubleshooting(Wireless Access Module (Mid-version/Lo-version [Except Passive Entry and Start System])) Lost communication with the Wireless Access Module (Mid-version/Lo-version [except Passive entry and start system]) (models with radar sensor/ stereo camera)".

7. Headlight auto leveling control unit communication verification

1) Verify the communication status with the headlight auto leveling control unit using a scan tool. Can communication with the headlight auto leveling control unit be established?

Yes

=>Go to Inspection for open circuit and short circuit in Body CAN communication circuit.

No

Go to Lost communication with the headlight auto leveling control unit.

Refer to "65.Lighting Control 10J.Troubleshooting(Headlight Automatic Leveling Control) lost communication with the headlight auto leveling control unit (models with radar sensor/ stereo camera)".

8. Instrument panel cluster power supply and ground circuit inspection

1) Inspect the power supply circuit and ground circuit of the instrument panel cluster for the following. Is the result normal?

Refer to "LHD Controller Area Network (Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 with DPD))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 without DPD, RZ4E))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Yes

=>Go to Inspection for open circuit and short circuit in Body CAN communication circuit.

No

Repair the circuit as necessary.

=>Go to Repair verification.

9. Inspection for open circuit and short circuit in Body CAN communication circuit

1) Inspect for an intermittent short together between the CAN Low and CAN High circuits, and an intermittent short to ground or intermittent short to the power supply circuit. Is the result normal?

2) Inspect for intermittent open circuits in the CAN Low circuit and CAN High circuit in the control unit with which communication cannot be established. Is the result normal?

Refer to "LHD Controller Area Network (Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 with DPD))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 without DPD, RZ4E))" in the ETM (wiring diagram). (Open using the ETM viewer.).

3) Are all of the results normal?

Yes

=>Go to Repair verification.

No

Repair the circuit as necessary.

=>Go to Repair verification.

10. Control panel inspection

1) Turn OFF the ignition switch.

2) Disconnect the control panel harness connector (B10).

Refer to "LHD Controller Area Network (Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 with DPD))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 without DPD, RZ4E))" in the ETM (wiring diagram). (Open using the ETM viewer.).

3) Turn ON the ignition switch.

4) Verify that communication can be established with the control units other than the control panel using a scan tool. Can communication with the control units other than the control panel be established?

Yes

=>Go to Control panel replacement.

No

=>Go to Instrument panel cluster inspection.

11. Instrument panel cluster inspection

1) Turn OFF the ignition switch.

2) Disconnect the instrument panel cluster harness connector (B7).

Refer to "LHD Controller Area Network (Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 with DPD))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 without DPD, RZ4E))" in the ETM (wiring diagram). (Open using the ETM viewer.).

3) Turn ON the ignition switch.

4) Verify that communication can be established with control units other than the instrument panel cluster using a scan tool. Can communication with control units other than the instrument panel cluster be established?

Yes

=>Go to Instrument panel cluster replacement.

No

=>Go to BCM inspection.

12. BCM inspection

1) Turn OFF the ignition switch.

2) Disconnect the BCM harness connector (B18).

Refer to "LHD Controller Area Network (Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 with DPD))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 without DPD, RZ4E))" in the ETM (wiring diagram). (Open using the ETM viewer.).

3) Turn ON the ignition switch.

4) Verify that communication can be established with control units other than the BCM using a scan tool. Can communication with control units other than the BCM be established?

Yes

=>Go to BCM replacement.

No

=>Go to Wireless access module inspection.

13. Wireless access module inspection

1) Turn OFF the ignition switch.

2) Disconnect the wireless access module harness connector (B13 or B15).

Refer to "LHD Controller Area Network (Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 with DPD))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 without DPD, RZ4E))" in the ETM (wiring diagram). (Open using the ETM viewer.).

3) Turn ON the ignition switch.

4) Verify that communication can be established with the control units other than the wireless access module using a scan tool. Can communication with the control units other than the wireless access module be established?

Yes

=>Go to Wireless access module replacement.

No

=>Go to Headlight auto leveling control unit inspection.

14. Headlight auto leveling control unit inspection

1) Turn OFF the ignition switch.

2) Disconnect the headlight auto leveling control unit harness connector (C99).

Refer to "LHD Controller Area Network (Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 with DPD))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 without DPD, RZ4E))" in the ETM (wiring diagram). (Open using the ETM viewer.).

3) Turn ON the ignition switch.

4) Check the communication status with control units other than the headlight auto leveling control unit using a scan tool. Can communication with control units other than the headlight auto leveling control unit be established?

Yes

=>Go to Headlight auto leveling control unit replacement.

No

=>Go to Body CAN communication circuit resistance check.

15. Body CAN communication circuit resistance check

1) Turn OFF the ignition switch.

2) Disconnect the central gateway control unit harness connector (B41).

3) Connect the instrument panel cluster harness connector (B7) and BCM harness connector (B18).

4) Measure the resistance at the instrument panel cluster (pins 21 and 22 of B7) from the backside of the instrument panel cluster harness connector with a DMM. Is the resistance within the specified range?

Refer to "LHD Controller Area Network (Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 with DPD))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 without DPD, RZ4E))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Value: 50 to 70 Ω

Yes

=>Go to Central gateway control unit replacement.

No

=>Go to Instrument panel cluster internal resistance inspection.

16. Instrument panel cluster internal resistance inspection

1) Disconnect the BCM harness connector (B18).

2) Measure the resistance of the BCM harness connector (pins 3 and 4 of B18) with a DMM. Is the resistance within the specified range?

Refer to "LHD Controller Area Network (Central Gateway C/U)" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 with DPD))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Refer to "RHD Controller Area Network (Central Gateway C/U (4JJ3 without DPD, RZ4E))" in the ETM (wiring diagram). (Open using the ETM viewer.).

Value: 110 to 130 Ω

Yes

=>Go to BCM replacement.

No

=>Go to Instrument panel cluster replacement.

17. Control panel replacement

Refer to "7.HVAC 7B.Heater Ventilator Airconditioner control panel and control lever removal".

Refer to "7.HVAC 7B.Heater Ventilator Airconditioner control panel and control lever installation".

Refer to "7.HVAC 7B.Heater Ventilator Airconditioner control panel and control lever setting".

Procedure completion

=>Go to Repair verification.

18. Instrument panel cluster replacement

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. instrument panel cluster removal".

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. instrument panel cluster installation".

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. instrument panel cluster setting".

Procedure completion

=>Go to Repair verification.

19. BCM replacement

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control BCM removal".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control BCM installation".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control BCM setting".

Procedure completion

=>Go to Repair verification.

20. Wireless access module replacement

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control wireless access module removal".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control wireless access module installation".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control wireless access module setting (with passive entry and start system)".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control wireless access module setting (without passive entry and start system)".

Procedure completion

=>Go to Repair verification.

21. Headlight auto leveling control unit replacement

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control headlight auto leveling control unit removal".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control headlight auto leveling control unit installation".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control headlight auto leveling control unit setting".

Procedure completion

=>Go to Repair verification.

22. Central gateway control unit replacement

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control central gateway control unit removal".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control central gateway control unit installation".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control central gateway control unit setting".

Procedure completion

=>Go to Repair verification.

23. Repair verification

1) Check the vehicle specifications and verify the status of communication with the following control modules using a scan tool. Can communication with all the control modules be established?

Yes

The system is normal.

No

=>Go to Scan tool communication verification.