1) Turn OFF the ignition switch.
2) Replace the IG2 relay with a known good relay.
3) Turn ON the ignition switch.
4) Observe the DTC information with a scan tool. Is a DTC set?
Yes
=>Go to Inspection for open circuit and short circuit in IG2 relay control circuit.
No
Replace the IG2 relay.
1) Inspect the control circuit between the wireless access module (pin 5 of B14) and the IG2 relay (pin 4 of B1) for the following. Is the result normal?
Refer to "LHD Power Door Locks (Wireless Access Module (Hi-version))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Power Door Locks (Wireless Access Module (Hi-version))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
=>Go to Wireless access module harness connector inspection.
No
Repair the circuit as necessary.
1) Inspect for poor connections at the wireless access module harness connector (pin 5 of B14). Is the connection status normal?
Refer to "LHD Power Door Locks (Wireless Access Module (Hi-version))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Refer to "RHD Power Door Locks (Wireless Access Module (Hi-version))" in the ETM (wiring diagram). (Open using the ETM viewer.).
Yes
=>Go to Wireless access module replacement.
No
Repair the connections as necessary.
Note
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".
Procedure completion
1) Clear the DTC with a scan tool.
2) Turn OFF the ignition switch.
3) Turn ON the ignition switch.
4) Observe the DTC information with a scan tool.