A/T - Harsh 4th - 3rd gear Downshifts
NUMBER: 21-006-03GROUP: Transmission
DATE: June 6, 2003
THIS BULLETIN IS BEING PROVIDED IN ADVANCE. THE MDS2 MUST BE OPERATING WITH CIS CD2135 OR HIGHER AVAILABLE JUNE 23, 2003.
SUBJECT:
Transmission Harsh 4-3 Downshift
OVERVIEW:
This bulletin involves reprogramming the Transmission Control Module (TCM).
MODELS:
2003 (RG) Chrysler Voyager (International Markets)
2003 (RS) Town & Country/Caravan/Voyager
NOTE:
THIS BULLETIN APPLIES TO RS/RG VEHICLES EQUIPPED WITH A 3.3L OR 3.8L ENGINE (SALES CODES EGA, EGH, OR EGM) AND A 41TE TRANSMISSION (SALES CODE DGL).
SYMPTOM/CONDITION:
Vehicle may exhibit, after an extended soak (several hours), a harsh 4-3 downshift.
DIAGNOSIS:
Using a Scan Tool (DRBIII(R)) with the appropriate Diagnostic Procedures, 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 the Symptom/Condition, perform the Repair Procedure.
PARTS REQUIRED
EQUIPMENT REQUIRED
REPAIR PROCEDURE:
1. Check the transmission fluid level. If fluid level is full proceed to step 2. If fluid level is low, diagnose and repair fluid leak. Proceed to step 2.
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 THE MDS2/TechCONNECT.
2. Connect a battery charger and set as close to 14 volts charge as possible.
3. Flash the controller using the TechCONNECT/MDS2 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.
4. Type the necessary information on the "Authorized Software Update Label" p/n 04669020 (Fig. 1). Attach the label to the controller and cover the label with the clear plastic overlay.
5. Type the necessary information on the "Authorized Modification Label" p/n 04275086AB and attach near the VECI label (Fig. 2).
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE
FAILURE CODE