Repair Procedure No. 1
REPAIR PROCEDURE NO. 1This procedure involves either flashing the TOM with new calibrations or replacing the TCM if it cannot be flashed and on 1993 and later models, setting the Pinion Factor and performing the Quick Learn procedure.
1. Examine the TCM for cooling fins and use a mirror to check the part number on the bottom of the TCM.
If the vehicle is equipped with a TCM WITHOUT cooling fins on it or is one of the part numbers listed below the TCM CANNOT be flashed, go to step 10 under Control Modules that CANNOT be flashed.
NOTE:
THE MOPAR DIAGNOSTIC SYSTEM (MDS) IS REQUIRED TO PERFORM THE FOLLOWING REPAIR AND THE SYSTEM MUST BE OPERATING WITH RELEASE 16 OR HIGHER INSTALLED.
2. Connecting the MDS and DRB III to the vehicle (Refer to illustration).
A) With the ignition off, disconnect the vehicle 60 way connector from the TOM on the vehicle.
B) Connect the controller programming harness (CH2500) from the Flash Programming Kit (CH5500) to the TOM on the vehicle.
C) Connect the Flash Programming Adapter (CH1500) to the controller programming harness (CH2500)
D) Connect the DRB III to the Flash Programming Adapter (CH1500) with DRB III DIN cable (CH7025).
E) Connect the MDS to the DRB III.
F) Power the DRB III and Adapter by connecting the battery leads to the vehicle battery.
3. Use the arrow keys on the DRB III and from the MAIN MENU Screen select MDS DIAGNOSTICS.
4. Use the arrow keys on the MDS and select DIAGNOSTIC MENU from the MDS screen, then press NEXT MENU.
5. Use the arrow keys on the MDS and select CONTROLLER PROGRAMMING, then press NEXT MENU.
6. Use the arrow keys on the MDS and select INFORMATION BY VIN, then press NEXT MENU.
7. Enter the VIN and press NEXT MENU.
8. The MDS will display the PROGRAMMABLE CONTROLLER UPDATE INFORMATION screen. Use the up/down arrow keys to scroll until the PRESS F8 TO VIEW TSB # line displays 18-27-94. Press F2 to begin the programming and follow the instructions on the MDS screen.
If the controller on the vehicle has already been flashed, the MDS screen will state THIS CONTROLLER HAS ALREADY BEEN PROGRAMMED WITH THE LATEST SOFTWARE AVAILABLE. Follow instructions on the MDS screen to exit.
9. After programming is complete, disconnect the MDS and DRB III, then go to step 14.
VEHICLES WITH TRANSAXLE CONTROL MODULES THAT CANNOT BE FLASHED
10. On 1993 - 1995 vehicles, program this Technical Service Bulletin No. (18-27-94) into the TCM that is currently installed on the vehicle (the Technical Service Bulletin No. cannot be programmed into 1992 and prior vehicles). This is accomplished by:
A) Using a stand-alone DRB III (with release 16) on 1994 - 1995 vehicles:
1) Connect the DRB III to the diagnostic connector at the bottom of the instrument panel near the steering column.
2) Select STAND-ALONE DRB III.
3) Select 94-95 DIAGNOSTICS.
4) Select TRANSMISSION.
5) Select MISCELLANEOUS.
6) Select TSB and follow the instructions on the DRB III screen.
B) Using a stand-alone DRB II (use super cartridge Version 7.0 or Version 8.0 depending on the individual vehicle) on 1993 - 1994 vehicles:
1) Connect the DRB II to the diagnostic connector at the bottom of the instrument panel near the steering column.
2) Select SYSTEM
3) Select TRANSMISSION.
4) Select ADJUSTMENTS.
5) Select TSB and follow the instructions on the DRB II screen.
NOTE:
THIS STEP WILL BE ELECTRONICALLY VERIFIED WHEN THE TCM IS INSPECTED AT THE CHRYSLER RETURN CENTER.
11. Replace the TCM with a revised TOM as specified in the Parts Required section of this TSB. Loosen the TOM 60-way connector screw and disconnect the 60-way connector from the TCM. Remove the TCM mounting screws and the TCM from the vehicle. Reverse the removal procedure to install the revised TCM.
12. Using the MDS and DRB III perform the Electronic Pinion Factor procedure on 1993 and later vehicles with 41TE transaxles when the TOM is replaced (not required on vehicles with 42LE transaxles, 1992 and prior models or if the TCM was flashed).
A) Connect the DRB III to the diagnostic connector at the bottom of the instrument panel near the steering column and the MDS.
B) From the DIAGNOSTIC MAIN MENU press NEXT MENU 2 times.
C) Select EATX DIAGNOSTICS.
D) Select EATX STATE DISPLAY and press F2.
E) Select ADJUSTMENTS and press F2.
F) Select PINION FACTOR and press F2.
G) Follow the instructions on the MDS screen.
NOTE:
BEFORE PERFORMING THE QUICK LEARN PROCEDURE, THE TRANSMISSION MUST BE SHIFTED INTO OVERDRIVE (OD) WITH THE ENGINE RUNNING AND TRANSMISSION FLUID SET TO THE CORRECT LEVEL. THIS WILL PURGE THE AIR IN THE CLUTCH CIRCUITS TO PREVENT ERRONEOUS CLUTCH VOLUME VALUES WHICH COULD CAUSE POOR INITIAL SHIFT QUALITY.
13. Using the MDS and DRB III perform the Quick Learn procedure, required whenever a transaxle or TCM is replaced on 1993 and later vehicles (Quick Learn cannot be performed on 1992 and prior vehicles).
A) Start the vehicle, place the shift lever in OD, move the vehicle at least five feet and then place shift lever in Neutral. Apply the parking brake and let the engine idle.
B) From the ADJUSTMENTS screen on MDS select QUICK LEARN and press F2.
C) Follow the instructions on the MDS screen.
NOTE:
THE FOLLOWING STEPS ARE REQUIRED BY FEDERAL LAW.
14. Type the necessary information on the Authorized Modification Label and attach the label near the Vehicle Emission Control Information (VECI) Label.
15. Type the necessary information on the "Authorized Software Update Label" and attach it to the TCM and cover label with a clear plastic sticker.