Refer to "75.Driver Assistance System 10W.Troubleshooting(Stereo Camera) diagnostic system check-stereo camera".
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 communication verification.
No
Go to Intermittent conditions of stereo camera.
Refer to "233.Driver Assistance System 46D.Symptom(Stereo Camera) intermittent conditions of stereo camera".
1) Use the scan tool to communicate with the EHCU and display the data. Can communication with the EHCU be established?
Yes
No
Go to Lost communication with the EHCU.
1) Observe the EHCU DTC information with a scan tool. Is a DTC set?
Yes
Go to the applicable DTC diagnosis.
No
=>Go to Chassis CAN communication circuit inspection.
1) Inspect the CAN Low circuit and CAN High circuit between the stereo camera (pins 7 and 8 of L17) and the EHCU (pins 14 and 26 of C13) 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 EHCU harness connector inspection.
No
Repair the circuit as necessary.
1) Inspect for poor connections at the EHCU harness connector (pins 14 and 26 of C13). Is the connection status 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 Stereo camera harness connector inspection.
No
Repair the connections as necessary.
1) Inspect for poor connections at the stereo camera harness connector (pins 7 and 8 of L17). Is the connection status 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
Replace the EHCU.
Note
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".
=>Go to Current DTC follow-up check.
No
Repair the connections as necessary.
1) Securely connect the disconnected harness connectors.
2) Clear the DTC with a scan tool.
3) Turn OFF the ignition switch for 30 seconds or more.
4) Turn ON the ignition switch.
5) Observe the DTC information with a scan tool. Is a DTC set?
Yes
=>Go to Stereo camera replacement.
No
Note
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
1) Securely connect the disconnected harness connectors.
2) Clear the DTC with a scan tool.
3) Turn OFF the ignition switch for 30 seconds or more.
4) Turn ON the ignition switch.
5) Observe the DTC information with a scan tool.