Climate Control Power and Ground Circuit Troubleshooting
Climate Control Power and Ground Circuit Troubleshooting1. Check the No. 36 (10 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?
YES - Go to step 2.
NO - Replace the fuse, and recheck. If the fuse blows again, check for a short in the No. 36 (10 A) fuse circuit.
2. Disconnect climate control unit connector A (32P).
3. Turn the ignition switch ON (II).
4. Measure the voltage between climate control unit connector A (32P) terminal No. 3 and body ground.
Is there battery voltage?
YES - Go to step 5.
NO - Repair an open in the wire between the No. 36 (10 A) fuse in the under-dash fuse/relay box and the climate control unit.
5. Turn the ignition switch OFF.
6. Check for continuity between climate control unit connector A (32P) terminal No. 5 and body ground.
Is there continuity?
YES - Check for loose wires and poor connections at climate control unit connector A (32P). If connections are good, substitute a known-good climate control unit and recheck. If the symptom/indication goes away, replace the original climate control unit.
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 G504.