|
STEP
|
INSPECTION
|
ACTION
|
|
1
|
• Connect WDS or equivalent to DLC-2.
• Turn ignition switch to ON (Engine OFF).
• Retrieve any DTC.
• Is "PASSED" displayed?
|
Yes
|
No DTC is displayed:
• Go to next step.
|
|
No
|
DTC is displayed:
• Go to appropriate DTC test.
|
|
2
|
• Start engine and run it at idle.
• Turn A/C switch on.
• Remove A/C relay.
• Does A/C magnetic clutch disengage?
|
Yes
|
Inspect for following:
• A/C relay is stuck closed.
• Short to GND circuit between A/C relay and PCM terminal 47
-
- If both items are normal, go to next step.
|
|
No
|
Inspect if circuit between A/C relay and magnetic clutch shorts to battery power circuit.
• If circuit is normal, inspect magnetic clutch stuck engagement or clearance.
|
|
3
|
• Disconnect refrigerant pressure switch connector.
• Start the engine and turn A/C switch on.
-
Note
-
• A/C should not work when the connector disconnected. If A/C remains working, short to GND circuit may be present.
• Does A/C remain working?
|
Yes
|
Inspect for short to GND circuit between refrigerant pressure switch and PCM terminal 5.
|
|
No
|
Go to next step.
|
|
4
|
• Reconnect refrigerant pressure switch connector.
• Turn off A/C switch.
-
Note
-
• A/C should not work when the A/C switch is turned off. If A/C remains working, short to GND circuit may be present.
• Does A/C remain working?
|
Yes
|
Inspect for following:
• Short to GND circuit between A/C switch and A/C amplifier
• Short to GND circuit between A/C amplifier and refrigerant pressure switch
|
|
No
|
Inspect for stuck closed A/C switch.
|
|
5
|
• Verify test results.
-
- If normal, return to diagnostic index to service any additional symptoms.
-
- If malfunction remains, inspect related Service Information and perform repair or diagnosis.
-
• If vehicle is repaired, troubleshooting completed.
-
• If vehicle is not repaired or additional diagnostic information is not available, replace or reprogram PCM.
|