Late Production (NGC)

Test 1 - 2:

Test 3 - 6:

SYMPTOM
P0645-A/C CLUTCH RELAY CIRCUIT

WHEN MONITORED
With the ignition on. Battery voltage greater than 10 volts. A/C Switch on.

SET CONDITION
An open or shorted condition is detected in the A/C clutch relay control circuit. One Trip Fault.

POSSIBLE CAUSES
- A/C clutch relay operation
- (A17) fused ignition switch output circuit
- A/C clutch relay resistance
- (C28) A/C clutch relay control circuit open
- (C28) A/C clutch relay control circuit short to ground
- PCM