Chrysler PT Cruiser 2001 Service Manual Supplement page 2670

HEATING & A/C
Symptom:
P0645-A/C CLUTCH RELAY CIRCUIT
When Monitored and Set Condition:
P0645-A/C CLUTCH RELAY CIRCUIT
When Monitored: With the ignition key in the run position and battery voltage above 10.4
volts.
Set Condition: An open or shorted condition is detected in the A/C clutch relay control
circuit.
A/C CLUTCH RLY CIRCUIT WIRING HARNESS OBSERVABLE PROBLEM
A/C CLUTCH RLY CIRCUIT WIRING HARNESS INTERMITTENT PROBLEM
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
A/C CLUTCH RELAY CONTROL CIRCUIT OPEN
A/C CLUTCH RELAY CONTROL CIRCUIT SHORT TO GROUND
A/C CLUTCH RELAY
PCM (A/C CLUTCH RELAY)
TEST
1 Ignition On, Engine Not Running
With the DRBIII , actuate the A/C Clutch Relay.
Is the A/C Clutch Relay clicking?
Yes → Go To 2
→ Go To 4
No
2 Turn the ignition off.
Using the schematic as a guide, inspect the Wiring and Connectors.
Were any problems found?
Yes → Repair as necessary.
→ Go To 3
No
3 Ignition on, engine not running.
With the DRBIII , actuate the A/C Clutch Relay.
Wiggle the Wiring Harness from the Relay to the PCM.
Did the wiggling interrupt the clicking?
Yes → Repair as necessary where wiggling caused the clicking to be
→ Test Complete.
No
POSSIBLE CAUSES
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 2.
interrupted.
Perform POWERTRAIN VERIFICATION TEST VER - 2.
210
APPLICABILITY
All
All
All