Durango 4WD V8-5.9L VIN Z (1998)
PROM - Programmable Read Only Memory: Customer Interest
Emissions - ASM Test Failure
NUMBER: 18-018-02
GROUP: Vehicle Performance
DATE: June 10, 2002
THIS BULLETIN IS BEING PROVIDED IN ADVANCE. THE MDS2 MUST BE OPERATING WITH CIS CD2III OR HIGHER, AVAILABLE
JULY 8, 2002.
SUBJECT:
Flash: NOx Emission Failure When Performing an ASM Type I/M Emission Test
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software (98Cal12E, 99Cal19E).
MODELS:
1998-1999 (DN) Durango
NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 5.2L ENGINE AND HAVE A CALIBRATION PRIOR TO THOSE LISTED
ABOVE.
DISCUSSION:
Some states have implemented an Acceleration Simulation Mode (ASM) type of vehicle emissions test for the I/M (inspection/maintenance) testing
programs. This test may fail the above models for NOx emissions. If a customer brings their vehicle in due to this failure, and no Diagnostic Trouble
Codes (DTC's) or other reasons are found for this failure, perform the Repair Procedure.
PARTS REQUIRED:
EQUIPMENT REQUIRED:
REPAIR PROCEDURE:
1.
Connect a battery charger and set as close to a 14 volts charge as possible
2.
Flash the PCM using the MDS2 (Mopar Diagnostic System) and DRBIII(R).
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.