300M V6-3.5L VIN G (2000)
Transmission Control Module: Customer Interest
A/T - Harsh 4 to 3 Downshift When Accelerating
NUMBER: 18-14-00
GROUP: Vehicle Performance
DATE: August 25, 2000
SUBJECT:
4 To 3 Harsh Downshift In The 25 to 40 MPH Range
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Transmission Control Module (TCM) with new software.
MODELS:
2000 (LH) Concorde/Intrepid/LHS/300M
NOTE:
THIS INFORMATION APPLIES TO VEHICLES EQUIPPED WITH A 42LE AUTOMATIC TRANSAXLE BUILT PRIOR TO JAN. 12, 2000
(MDH0112XX).
SYMPTOM/CONDITION:
Some vehicles may experience a harsh 4 to 3 downshift when accelerating in the 25 to 40 mile per hour range.
DIAGNOSIS:
Using the Mopar Diagnostic System (MDS2) and or the Diagnostic Scan Tool (DRB III) with the appropriate Diagnostic Procedures Manual, verify all
engine/transmission systems are functioning as designed. If Diagnostic Trouble Codes (DTC's) are present, record them on the repair order and repair as
necessary before proceeding then further with this bulletin. If the only condition described by the vehicle operator is a harsh 4 to 3 downshift, Perform
The Repair Procedure.
NOTE:
WHENEVER A TRANSMISSION CONTROL MODULE (TCM) IS REPLACED, THE SOFTWARE OF THE REPLACEMENT CONTROLLER
MUST BE VERIFIED FOR THE LATEST REVISION LEVEL. USE THE FLASH PROCEDURE TO UPDATE REPLACED CONTROLLERS
AS NECESSARY.
PARTS REQUIRED:
EQUIPMENT REQUIRED:
NOTE:
THE MDS2 AND DRB III(R) ARE REQUIRED TO PERFORM PART OF THIS REPAIR. THE MDS2 SYSTEM MUST BE OPERATING AT
CIS CD2065 OR HIGHER.
REPAIR PROCEDURE:
1.
Log onto the MDS2 system.
2.
Connect the MDS2 (Mopar Diagnostic System) and DRB III(R) (Scan Tool) to the vehicle and switch the ignition key to "ON".
3.
Use the arrow keys and select # 2 CONNECT TO MDS1 OR MDS2 on the DRB III(R) MAIN MENU SCREEN.
4.
Use the arrow keys and select # 2 RUN MDS2 APPLICATION on the DRB III(R) MAIN MENU SCREEN.
NOTE:
ONCE MDS2, DRB III(R), AND VEHICLE COMMUNICATION HAS BEEN ESTABLISHED, THE "CANNOT READ VIN FROM DRB III(R)"
MESSAGE (ON THE MDS2) WILL BE REPLACED BY THE VEHICLE VIN. PRESS THE "OK" BUTTON ON THE MDS2 TO REQUEST A
