Grand Cherokee 2WD V8-4.7L VIN J (2004)
PROM - Programmable Read Only Memory: Customer Interest
Engine Controls - Warm Engine Rough Idle
NUMBER: 18-045-04
GROUP: Vehicle Performance
DATE: December 18, 2004
THIS BULLETIN IS BEING PROVIDED IN ADVANCE. DO NOT PERFORM ANY ACTIONS RELATED TO THIS BULLETIN UNTIL
DECEMBER 22, 2004. THE DRBIII(R) FLASH FILES FOR THIS BULLETIN WILL BE AVAILABLE ON DealerCONNECT AT THAT TIME.
SUBJECT:
FLASH: 4.7L Warm Engine Rough Idle
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software.
MODELS:
2002 - 2004
(WJ)
Grand Cherokee
NOTE:
This bulletin applies to vehicles equipped with a 4.7L or a 4.7L High Output engine (sales code EVA or EVC respectively).
SYMPTOM/CONDITION:
The following enhancements are included with this software:
^
Improved warm engine idle quality.
The vehicle operator may experience a warm engine rough idle while the vehicle is in gear and standing still.
DIAGNOSIS:
Using a Scan Tool (DRBII I®) with the appropriate Diagnostic Procedures Manual, verify all engine systems are functioning as designed. If DTCs are
present record them on the repair order and repair as necessary before proceeding further with this bulletin.
If the vehicle operator describes or experiences the Symptom/Condition, perform the 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 performed.
REPAIR PROCEDURE:
