Grand Cherokee 4WD V8-4.7L (2003)
DIAGNOSIS:
Using a Scan Tool (DRBIII(R)) with the appropriate Diagnostic Procedures Manual, verify all engine systems are functioning as designed. If DTCs are
present, other than those listed above, record them on the repair order and repair as necessary before proceeding further with this bulletin.
Service technicians are not required to duplicate these concerns. If the vehicle operator's description matches the Symptom/Conditions or the vehicle
exhibits any of the Symptom/Conditions, perform Repair Procedure.
PARTS REQUIRED
SPECIAL TOOLS/EQUIPMENT REQUIRED
NOTE:
An updated J1962 cable has been released. This cable has a red colored connector at the DRBIII(R) connection. Use this cable whenever a flash is
being preformed.
REPAIR PROCEDURE:
NOTE:
Whenever a PCM/TCM is replaced or reprogrammed, the software in the controller and DRBIII(R) must be verified as having the latest revision
level. If a controller software update flash is available, complete the flash and labeling requirement as directed in the appropriate service bulletin
identified on TechCONNECT.
1.
**KJ/WG/WJ vehicles proceed to (STEP # 2). AN/DN/DR vehicles, place the ignition switch in the "LOCK" position and unplug the CAB C1 (14
way) electrical connector. The CAB C1 connector is located in the engine compartment near the left fender/cowl area.**
2.
Connect a battery charger and set as close to 14 volts charge as possible.
3.
Flash the controller using TechCONNECT and the DRBIII(R).
4.
**KJ/WG/WJ vehicles proceed to (STEP # 5). AN/DN/DR vehicles, place the ignition switch in the "LOCK" position and plug the CAB C1
electrical connector into the CAB.**
NOTE:
Due to the PCM reprogramming procedure, a DTC may be set in other modules (TCM, BCM, MIC, SKIM, etc.) within the vehicle, if so
equipped. Some DTC's may cause the MIL to illuminate. All DTC's relate to a loss of communications with the module that is being
reprogrammed. Check all modules, record the faults, and erase these faults prior to returning the vehicle to the customer. Erase any faults in the
PCM only after all other modules have had their faults erased.
NOTE:
The following steps are required by law.