P0646

Test 1 - 3:

Test 4 - 7:

SYMPTOM
P0646-LOW VOLTAGE DETECTED AT THE A/C CLUTCH RELAY

WHEN MONITORED
When the ignition is on.

SET CONDITION
When the signal from the A/C Clutch output does not match the signal from the A/C Clutch feedback.

POSSIBLE CAUSES
- A/C clutch relay
- Loose connection
- Fused battery supply
- (C13) A/C signal circuit open
- (C 13) A/C signal circuit shorted to ground
- Intermittent condition
- ECM