Refer to "56.Steering Control 6A.Troubleshooting diagnostic system check-electric power steering controls".
1) Connect the scan tool.
2) Start the engine.
3) Observe the DTC information with a scan tool. Is a DTC set?
Yes
=>Go to Stereo camera communication verification.
No
Go to Intermittent conditions of electric power steering control system.
Refer to "207.Steering 20D.Symptom intermittent conditions of electric power steering control system".
1) Use the scan tool to communicate with the stereo camera to display the data. Can communication with the stereo camera be established?
Yes
=>Go to Stereo camera DTC check.
No
Go to Lost communication with the stereo camera.
Refer to "75.Driver Assistance System 10W.Troubleshooting(Stereo Camera) lost communication with the stereo camera".
1) Observe the stereo camera 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 EPS motor control unit (pins 4 and 5 of C116) and the stereo camera (pins 7 and 8 of L17) for the following. Is the result normal?
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 circuit as necessary.
1) Inspect for poor connections at the stereo camera (pins 7 and 8 of L17). Is the connection status normal?
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 EPS motor control unit harness connector inspection.
No
Repair the connections as necessary.
1) Inspect for poor connections at the EPS motor control unit harness connector (pins 4 and 5 of C116). Is the connection status normal?
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 stereo camera.
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".
=>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 EPS motor control unit replacement.
No
Note
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".
Refer to "6.Steering 6B.Power Assisted System power steering unit setting".
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.