Climate Control Power And Ground Circuit Troubleshooting (With Climate Control)

Climate Control Power and Ground Circuit Troubleshooting

1. Check the No. 30 (10 A) fuse in the under-dash fuse/relay box.

Is the fuse OK?

YES -

Go to step 2.

NO -

Check for a short in the No. 30 (10 A) fuse circuit.�

2. Disconnect the climate control unit 30P connector.

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

4. Measure the voltage between climate control unit 30P connector terminal No. 1 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 under-dash fuse/relay box and the climate control unit.�

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

6. Check for continuity between climate control unit 30P connector terminal No. 15 and body ground.





Is there continuity?

YES -

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

NO -

Check for an open in the wire between the climate control unit and body ground. If the wire is OK, check for poor ground at G401.�