Climate Control Power and Ground Circuit Troubleshooting
Climate Control Power and Ground Circuit TroubleshootingNOTE: Before performing symptom troubleshooting, check for powertrain DTC.
1. Check the No. 3 (7.5 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. Turn the ignition switch ON (II).
3. Measure the voltage between the No. 13 terminal of climate control unit connector B (30P) and body ground.
Is there battery voltage?
YES - Go to step 5.
NO - Repair open in the wire between the No. 3 fuse in the driver's under-dash fuse/relay box and the climate control unit.
4. Turn the ignition switch OFF.
5. Check for voltage between the No. 29 terminal of climate control unit connector B (30P) and body ground.
Is there less than 0.1 V?
YES - Check for loose wires or poor connections at climate control unit connector B (30P). If the 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 G401.