Front Climate Control Unit Power and Ground Circuit Troubleshooting

Front Climate Control Unit Power and Ground Circuit Troubleshooting

1. 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 front climate control unit 30P connector.

3. Turn the ignition switch to ON (II).

4. Measure the voltage between front climate control unit 30P connector terminal No. 14 and body ground.





Is there battery voltage?

YES -

Go to step 5.

NO -

Repair an open in the wire between the No. 30 (10 A) fuse in the driver's under-dash fuse/relay box and the front climate control unit.�

5. Turn the ignition switch to LOCK (0).

6. Check for continuity between front climate control unit 30P connector terminal No. 30 and body ground.





Is there continuity?

YES -

Check for loose wires or poor connections at the front climate control unit 30P connector. If the connections are good, substitute a known-good front climate control unit, and recheck. If the symptom/indication goes away, replace the original front climate control unit Front Climate Control Unit Removal/Installation.�

NO -

Check for an open in the wires between the front climate control unit and body ground. If the wire is OK, check for poor ground at G504.�