Engine - Light Surge Between 42 and 50 MPH

NO: 18-15-98

GROUP: Vehicle Performance

DATE: Mar. 27, 1998

SUBJECT:
Light Surge Between 42 And 50 Miles Per Hour

MODELS:
1996-1997 (LH) Intrepid/Concorde/LHS/New Yorker

NOTE:
THIS INFORMATION APPLIES TO VEHICLES EQUIPPED WITH A 3.5L ENGINE.

SYMPTOM/CONDITION:

A light surge may be experienced between 42 and 50 miles per hour after/during electronically modulated clutch control (EMCC) operation. Generally, this condition is only noticed on very smooth roads.

DIAGNOSIS:

Using the Mopar Diagnostic System (MDS) or the Diagnostic Scan Tool (DRB III (R)) 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 further with this bulletin. If no DTC's are present, perform the Repair Procedure.

NOTE:
WHENEVER A POWERTRAIN (PCM) OR TRANSMISSION (TCM) CONTROL MODULE IS REPLACED DUE TO FAILURE, THE SOFTWARE OF THE REPLACEMENT CONTROLLER SHOULD BE VERIFIED FOR THE LATEST REVISION LEVEL. USE THE FLASH PROCEDURE TO UPDATE REPLACED CONTROLLERS AS NECESSARY.

EQUIPMENT/PARTS REQUIRED:

1 CH6000 Scan Tool (DRB III)(R)
1 CH7035 General Purpose Interface Bus Cable (GPIB)
1 CH7000/7001 J1962 Cable
2 04669020 Label - Authorized Software Update
1 04275086 Label - Authorized Modification

NOTE:
THE MDS AND DRB III(R) ARE REQUIRED TO PERFORM THIS REPAIR AND THE SYSTEM MUST BE OPERATING WITH RELEASE 21 OR HIGHER AND TIL CD RELEASE 1155 OR HIGHER MUST BE INSTALLED.

REPAIR PROCEDURE:

This bulletin involves selectively erasing and reprogramming the Powertrain (PCM) and Transmission (TCM) Control Modules with new software (calibration changes).

NOTE:
THE PCM AND TCM WILL REQUIRE A FLASH UPDATE TO CORRECT THIS CONDITION. THE INFORMATION THAT PERTAINS TO THE TCM FLASH IS REFERENCED IN TECHNICAL SERVICE BULLETIN 21-02-98.

1. Connect the MDS (Mopar Diagnostic System) and DRB III(R) (Scan Tool) to the vehicle and power them up.

2. Use the arrow keys and select # 2 MDS DIAGNOSTICS on the DRB III(R) MAIN MENU Screen.

3. Use the arrow keys and select DIAGNOSTIC MENU on the MDS, then press NEXT MENU.

4. Use the arrow keys and select VEHICLE CONTROLLER PROGRAMMING on the MDS, then press NEXT MENU.

5. Use the arrow keys and select PROGRAMMING OF ALL OTHER CONTROLLERS USING MDS & DRB III(R) on the MDS, then press NEXT MENU.

6. Follow the steps presented on the MDS and DRB III(R) which will allow the DRB III(R) to obtain the current part number of the PCM or TCM.

7. The MDS will display the part number of the PCM or TCM on the vehicle and the appropriate replacement part number, then press NEXT MENU to begin programming.

If the PCM or TCM on the vehicle has already been updated or programmed, a NO UPDATES AVAILABLE message will be displayed. Check the part number of the PCM or TCM on the vehicle and compare it to the part number displayed. If the PCM or TCM has already been updated, then another condition exists that will require further diagnosis and repair.

8. The MDS and DRB III(R) will prompt for any operator action needed during the remainder of the programming process.

9. Repeat steps 1 through 8 to reflash the TCM.

NOTE:
THE FOLLOWING STEPS ARE REQUIRED BY LAW.





10. Type the necessary information on each "Authorized Software Update Label" p/n 04669020 (Figure 1). Attach one label to the PCM and the other to the TCM. Cover each label with the clear plastic overlay.





11. Type the necessary information on the "Authorized Modification Label" p/n 04275086 and attach the label near the VECI Label (Figure 2).

POLICY: Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:

Labor Operation No: 08-19-40-90 Powertrain Control Module Reprogram 0.5 Hrs.

Labor Operation No: 08-19-50-94 Transmission Control Module Reprogram 0.5 Hrs.

FAILURE CODE: FM - Flash Module