PCM - Hot Sag/Spark Knock/A/T Shift Issues
NUMBER: 18-009-02GROUP: Vehicle Performance
DATE: February 25, 2002
THIS BULLETIN IS BEING PROVIDED IN ADVANCE. THE MDS2 MUST BE OPERATING WITH CIS CD2103 OR HIGHER, AVAILABLE MARCH 18, 2002.
SUBJECT:
Flash: Hot Sag/Spark Knock/Transmission Shift Issues
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the JTEC Powertrain Control Module (PCM) with new software (01Cal18).
MODELS:
2001 (AB) Ram Van
2001 (AN/AN84) Dakota Truck
2001 (BR) Ram Truck
NOTE:
THIS BULLETIN APPLIES TO 2001 (AB) RAM VANS, (AN/AN84) DAKOTA TRUCKS, AND (BR) RAM TRUCKS EQUIPPED WITH A 3.9L ENGINE AND CALIBRATION LEVEL PRIOR TO (LESS OR LOWER THAN) THOSE LISTED IN THE OVERVIEW ABOVE.
SYMPTOM/CONDITION:
The customer may complain of one or more of the following symptoms:
1. Engine spark knock.
2. Engine performance sags upon acceleration when engine is at operating temperature.
NOTE:
ITEMS # 3 AND # 4 BELOW APPLY TO THE (AN/AN84 AND BR) DAKOTA AND RAM TRUCK ONLY.
3. Transmission does not upshift from 3rd gear after a 4/3 downshift. (Most often noticed when cruise control is engaged.)
4. Transmission hunts from 2nd gear to 3rd gear back to 2nd gear when near wide open throttle.
PARTS REQUIRED:
EQUIPMENT REQUIRED:
REPAIR PROCEDURE:
1. Flash the controller using the MDS2 (Mopar Diagnostic System) and DRBIII(R)
NOTE:
DUE TO THE PCM REPROGRAMMING PROCEDURE, A DTC MAY BE SET IN OTHER MODULES (EATX, 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.
2. Type the necessary information on the "Authorized Software Update Label" p/n 04669020 (Fig. 1). Attach the label to the PCM and cover the label with the clear plastic overlay.
3. Type the necessary information on the "Authorized Modification Label" p/n 04275086 and attach the label near the VECI label (Fig. (STEP # 3)).
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
FAILURE CODE: