Rear Climate Control Unit Power and Ground Circuit Troubleshooting
Rear Climate Control Unit Power and Ground Circuit Troubleshooting1. Check the No. 30 (10 A) fuse in the driver's under-dash fuse/relay box.
Is the fuse OK?
YES - Go to step 2.
NO - Replace the fuse, and recheck.
2. Disconnect the rear climate control unit 22P connector.
3. Turn the ignition switch to ON (II).
4. Measure the voltage between the No. 10 terminal of rear climate control unit 22P connector and body ground.
Is there battery voltage?
YES - Go to step 5.
NO - Repair open in the wire between the No. 30 (10 A) fuse in the driver's under-dash fuse/relay box and the rear climate control unit.
5. Turn the ignition switch to LOCK (0).
6. Check for continuity between the No. 22 terminal of rear climate control unit 22P connector and body ground.
Is there continuity?
YES - Check for loose wires or poor connections at the rear climate control unit 22P connector. If the connections are good, substitute a known-good rear climate control unit, and recheck. If the symptom/indication goes away, replace the original rear climate control unit.
NO - Check for an open in the wires between the rear climate control unit and body ground. If the wire is OK, check for poor ground at G652.