Jeep XJ. Manual - part 641
Symptom:
P1655-AC CONTROL SHORT CIRCUIT - DIESEL
When Monitored and Set Condition:
P1655-AC CONTROL SHORT CIRCUIT - DIESEL
When Monitored:
With the ignition on.
Set Condition:
The ECM detects excessive current draw on the A/C clutch relay control
circuit when attempting to activate the A/C clutch. NOTE: AC is an option that may not be
present on all vehicles.
POSSIBLE CAUSES
INTERMITTENT CONDITION
SUBSTITUTE A/C COMPRESSOR CLUTCH RELAY
A/C COMPRESSOR CLUTCH RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE
ENGINE CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRB, actuate the A/C Compressor Clutch Relay.
Is the A/C Compressor Clutch Relay clicking?
All
Yes
→
No
→
NOTE: Stop the A/C Compressor Clutch Relay actuation by the DRB.
2
WARNING: KEEP CLEAR OF THE ENGINE’S MOVING PARTS.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→
Repair as necessary
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Test Complete.
216
HEATING & A/C