Chrysler Concorde 2004 Service Manual page 911

Symptom:
P0645-A/C CLUTCH RELAY CIRCUIT
When Monitored and Set Condition:
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.
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
TEST
1 Ignition on, engine not running.
With the DRBIII , actuate the A/C Clutch Relay.
Is the A/C Clutch Relay operating?
Yes → Refer to the INTERMITTENT CONDITION symptom in the
→ Go To 2
No
2 Turn the ignition off.
Remove the A/C Clutch Relay from the PDC.
Ignition on, engine not running.
Measure the voltage on the (A14) Fused Ignition Switch Output circuit in the PDC.
Is the voltage above 11.0 volts?
Yes → Go To 3
→ Repair the open or short to ground in the (A17) Fused Ignition
No
POSSIBLE CAUSES
ACTION
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.
Switch Output circuit. Check and replace any open fuses.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.
DRIVEABILITY - NGC
253
APPLICABILITY
All
All