P0645

Test 1 - Test 2:

Test 3 - Test 7:

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. The desired A/C state does not equal the actual A/C clutch relay state. Three good trips to clear the MIL.

POSSIBLE CAUSES
- A/C clutch relay operation
- (F960) Fused ignition switch output circuit
- (A926) Fused B+ circuit
- A/C clutch relay
- (C13) A/C clutch relay control circuit open
- (C13) A/C clutch relay control circuit shorted to ground
- PCM