Main Power Supply and Ground Circuit Check

* Manual Air Conditioning System *
TROUBLE DIAGNOSIS PROCEDURE FOR A/C SYSTEM

Inspection Flow:

MAIN POWER SUPPLY AND GROUND CIRCUIT CHECK

SYMPTOM:
* A/C system does not come on.


A/C SYSTEM CIRCUIT






Push Control Unit Check
Check power supply circuit for push control unit with ignition switch ON.
1. Disconnect push control unit harness connector.
2. Connect voltmeter from harness side.






3. Measure voltage across terminal No. 14 and body ground.






Check body ground circuit for push control unit with ignition switch OFF.
1. Disconnect push control unit harness connector.
2. Connect ohmmeter from harness side.






3. Check for continuity between terminal No. 17 and body ground.