DTC U0055[88] CAN Communication Malfunction (CAN 5 Bus Off) (Central GateWay)

Note

The installed devices vary depending on the vehicle. All the devices that may be connected to the CAN communication circuit are shown in the diagnostic procedure. Perform diagnosis only for the applicable device procedure.

1. Body control system check

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

2. Current DTC check

1) Connect the scan tool.

2) Turn ON the ignition switch.

3) Observe the DTC information with a scan tool. Is a DTC set?

Yes

=>Go to EHCU inspection.

Go to Intermittent conditions of body control system.

Refer to "223.Body Control 36D.Symptom(Central GateWay) intermittent conditions of body control system".

3. EHCU inspection

1) Turn OFF the ignition switch.

2) Disconnect the EHCU harness connector (C13).

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) Observe the DTC information with a scan tool for DTC U0055[88] being set as a current failure. Is a DTC set?

Yes

=>Go to Inspection of steering angle sensor.

=>Go to EHCU replacement.

4. Inspection of steering angle sensor

1) Turn OFF the ignition switch.

2) Disconnect the steering angle sensor harness connector (B33).

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) Observe the DTC information with a scan tool for DTC U0055[88] being set as a current failure. Is a DTC set?

Yes

=>Go to EPS motor control unit inspection.

=>Go to Steering angle sensor replacement.

5. EPS motor control unit inspection

1) Turn OFF the ignition switch.

2) Disconnect the EPS motor control unit harness connector (C116).

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

3) Turn ON the ignition switch.

4) Observe the DTC information with a scan tool for DTC U0055[88] being set as a current failure. Is a DTC set?

Yes

=>Go to SRS control unit inspection.

=>Go to EPS motor control unit replacement.

6. SRS control unit inspection

1) Turn OFF the ignition switch.

2) Disconnect the SRS control unit harness connector (B8 or B9).

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) Observe the DTC information with a scan tool for DTC U0055[88] being set as a current failure. Is a DTC set?

Yes

=>Go to Information module inspection.

=>Go to SRS control unit replacement.

7. Information module inspection

1) Turn OFF the ignition switch.

2) Disconnect the information module harness connector (C105).

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) Observe the DTC information with a scan tool for DTC U0055[88] being set as a current failure. Is a DTC set?

Yes

=>Go to Parking aid system control unit inspection.

=>Go to Information module replacement.

8. Parking aid system control unit inspection

1) Turn OFF the ignition switch.

2) Disconnect the parking aid system control unit harness connector (C16).

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) Observe the DTC information with a scan tool for DTC U0055[88] being set as a current failure. Is a DTC set?

Yes

=>Go to Stereo camera inspection.

=>Go to Parking aid system control unit replacement.

9. Stereo camera inspection

1) Turn OFF the ignition switch.

2) Disconnect the stereo camera harness connector (L17).

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) Observe the DTC information with a scan tool for DTC U0055[88] being set as a current failure. Is a DTC set?

Yes

=>Go to Chassis CAN communication circuit inspection.

=>Go to Stereo camera replacement.

10. Chassis CAN communication circuit inspection

1) Inspect the Chassis CAN communication circuit for the following. Is the result normal?

Open circuit or high resistance
Short together between circuits
Short to battery or short to ignition power supply circuit
Short to ground

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 (Models with radar sensors)

=>Go to Radar sensor (Right) replacement.

Yes (Except models with radar sensors)

=>Go to Central gateway control unit replacement.

Repair the circuit as necessary.

=>Go to Repair verification.

11. Radar sensor (Right) replacement

Note

Perform programming after replacing the radar sensor (Right).

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. radar sensor removal".

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. radar sensor installation".

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. radar sensor setting".

Procedure completion

=>Go to DTC check after radar sensor (Right) replacement.

12. DTC check after radar sensor (Right) replacement

1) Turn OFF the ignition switch.

2) Turn ON the ignition switch.

3) Observe the DTC information with a scan tool for DTC U0055[88] being set as a current failure. Is a DTC set?

Yes

Replace the radar sensor (Left).

Note

Perform programming after replacing the radar sensor (Left).

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. radar sensor removal".

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. radar sensor installation".

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. radar sensor setting".

=>Go to DTC check after radar sensor (Left) replacement.

=>Go to Repair verification.

13. DTC check after radar sensor (Left) replacement

1) Turn OFF the ignition switch.

2) Turn ON the ignition switch.

3) Observe the DTC information with a scan tool for DTC U0055[88] being set as a current failure. Is a DTC set?

Yes

=>Go to Central gateway control unit replacement.

=>Go to Repair verification.

14. EHCU replacement

Note

Perform programming after replacing the EHCU.

Refer to "4.Brakes 4Z.Brake Electrical Control EHCU removal".

Refer to "4.Brakes 4Z.Brake Electrical Control EHCU installation".

Refer to "4.Brakes 4Z.Brake Electrical Control EHCU setting".

Procedure completion

=>Go to Repair verification.

15. Steering angle sensor replacement

Note

Perform programming after replacing the steering angle sensor.

Refer to "6.Steering 6Z.Steering Electrical Control steering angle sensor removal".

Refer to "6.Steering 6Z.Steering Electrical Control steering angle sensor installation".

Refer to "6.Steering 6Z.Steering Electrical Control steering angle sensor setting".

Procedure completion

=>Go to Repair verification.

16. EPS motor control unit replacement

Note

Perform programming after replacing the EPS motor control unit.

Refer to "6.Steering 6B.Power Assisted System power steering unit removal".

Refer to "6.Steering 6B.Power Assisted System power steering unit disassembly".

Refer to "6.Steering 6B.Power Assisted System power steering unit reassembly".

Refer to "6.Steering 6B.Power Assisted System power steering unit installation".

Procedure completion

=>Go to Repair verification.

17. SRS control unit replacement

Note

Perform programming after replacing the SRS control unit.

Refer to "8.Restraints 8Z.Seat Belt and SRS Airbag Electrical Control SRS control unit removal".

Refer to "8.Restraints 8Z.Seat Belt and SRS Airbag Electrical Control SRS control unit installation".

Refer to "8.Restraints 8Z.Seat Belt and SRS Airbag Electrical Control SRS control unit setting".

Procedure completion

=>Go to Repair verification.

18. Information module replacement

Note

Perform programming after replacing the information module.

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

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

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

Procedure completion

=>Go to Repair verification.

19. Parking aid system control unit replacement

Note

Perform programming after replacing the parking aid system control unit.

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control parking aid system control unit removal".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control parking aid system control unit installation".

Refer to "9.Body, Cab, Accessories 9Z.Body, Cab, Accessories Electrical Control parking aid system control unit setting".

Procedure completion

=>Go to Repair verification.

20. Stereo camera replacement

Note

Perform programming and learning after replacing the stereo camera.

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. stereo camera removal".

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. stereo camera installation".

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. stereo camera setting".

Refer to "9.Body, Cab, Accessories 9E.Instrumentation, Driver Info. stereo camera writing".

Procedure completion

=>Go to Repair verification.

21. Central gateway control unit replacement

Note

Perform programming after replacing the central gateway control unit.

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.

22. Repair verification

1) Clear the DTC with a scan tool.

2) Turn OFF the ignition switch for 30 seconds or more.

3) Turn ON the ignition switch.

4) Observe the DTC information with a scan tool.