P0645

Test 1:

Tests 2 - 4:

Tests 5 - 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. One Trip Fault.

POSSIBLE CAUSES
- Intermittent condition
- Fused ignition switch output circuit
- A/C clutch relay resistance
- A/C clutch relay control circuit open
- A/C clutch relay control circuit short to ground
- PCM