DaimlerChrysler Jeep Grand Cherokee 2002 Service Manual page 254

SENTRY KEY IMMOBILIZER
ROLLING CODE FAILURE —
TEST
2 Turn the ignition on.
With the DRBIII , select Engine system from the main menu.
Display and record the Vehicle Identification Number.
NOTE: Ensure that a VIN has been programmed into the ECM. If a VIN is not
displayed, attempt to program the ECM with the correct vehicle VIN before
continuing.
Does the VIN recorded from the ECM match the VIN of the vehicle?
Yes → Go To 3
→ Replace and program the Engine Control Module in accordance
No
3 Turn the ignition off.
Replace and program the Sentry Key Immobilizer Module in accordance with the
Service Information.
Turn the ignition on.
With the DRBIII , display and clear all ECM and SKIM DTC's.
Perform 5 ignition key cycles leaving the ignition key on for 90 seconds per cycle.
With the DRBIII , check for SKIM DTCs.
Does the DRBIII display the same DTC?
Yes → Replace and program the Engine Control Module in accordance
→ The repair is complete.
No
4 Turn the ignition off.
Note: Visually inspect the related wiring harness. Look for any chafed,
pierced, pinched, or partially broken wires.
NOTE: Visually inspect the related wiring harness connectors. Look for
broken, bent, pushed out, or corroded terminals.
Note: Refer to any Technical Service Bulletins (TSB) that may apply.
Were any problems found?
Yes → Repair wiring harness/connectors as necessary.
→ Test Complete.
No
Continued
ACTION
with the Service Information.
Perform SKIS VERIFICATION.
with the Service Information.
Perform SKIS VERIFICATION.
Perform SKIS VERIFICATION.
Perform SKIS VERIFICATION.
246
APPLICABILITY
All
All
All