Control Module HVAC: Testing and Inspection

A/C Control Unit Check (Manual A/C)
Check power supply circuit for A/C control unit with ignition switch ON.








1. Disconnect A/C control unit harness connector.
2. Connect voltmeter from harness side.
3. Measure voltage between terminal 10 and ground.
If NG, check 7.5A fuse (No.13) at fuse block.








Check ground circuit for A/C control unit with ignition switch OFF.

1. Disconnect A/C control unit harness connector.
2. Connect ohmmeter to harness side.
3. Check for continuity between terminal 6 and ground.
If NG, repair harness or connector.

For further trouble diagnosis of the A/C System, please see Heating and Air Conditioning / System Diagnosis / Diagnosis, Manual Air Conditioning.