2007 Liberty KJ Factory Service Manual 9 - ENGINE

P1002-IGNITION KEY OFF TIMER PERFORMANCE - TOO SLOW

For a complete wiring diagram Refer to Section 8W



Possible Causes
  
BODY CONTROL MODULE
  
BODY CONTROL MODULE POWER AND GROUNDS
  
CHECKING FOR OTHER DTCS
  
CHECKING THE ECT OPERATION
  
IGNITION SWITCH
  
INTERMITTENT CONDITION
  



Diagnostic Test

1. CHECK FOR ACTIVE DTC

NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions under which the DTC was set. Some of these conditions are displayed on the scan tool at the same time the DTC is displayed.


NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC.


Turn the ignition on.
With the scan tool, erase ECM DTCs.
Perform several ignition on key cycles turning the ignition off for 10 seconds between cycles.
Turn the ignition on.
Monitor the scan tool for ECM DTCs.

Did this DTC set again?

Yes


No

2. CHECKING FOR OTHER DTCS

Turn the ignition on.
Does the scan tool display all FCM and BCM DTC's.

NOTE: Any ECM communication related DTC's in the FCM or BCM must be diagnosed and corrected before continuing to diagnose this DTC.



Are there any ECM communication related DTC's in the FCM or BCM?

Yes


No

3. CHECKING THE ECT OPERATION

Refer to symptom Checking the ECT Sensor and verify proper ECT Sensor operation.

Is the ECT Sensor operating correctly?

Yes


No

4. IGNITION SWITCH



Refer to the Wiring Information and verify proper ignition switch operation. Turn the ignition key to each position and verifying correct voltage output at each ignition switch harness connector cavity.

Is the Ignition Switch functioning properly?

Yes


No

5. VERIFY THAT THE BCM IS ACTIVE ON THE BUS

With the scan tool, select ECU View.
Verify that the BCM is active on the bus.

Is the BCM active on the bus?

Yes


No