PCM - Erroneous Misfire DTC
NO: 18-33-95 Rev. AGROUP: Vehicle Performance
DATE: Jan. 19, 1996
SUBJECT: Erroneous Misfire Diagnostic Trouble Codes (DTC's)
This bulletin supersedes Technical Service Bulletin 18-33-95 dated Nov. 17, 1995 which should be removed from your files. the Labor Operation Number has been corrected and additional model added. The changes are highlighted with **asterisks**.
MODELS: **1996 (LH) Concorde/Intrepid/Vision/LHS/New Yorker**
1996 (NS) Caravan/Voyager
NOTE:
This bulletin applies to vehicles built prior to Mid-November 1995 and equipped with a 3.0L engine (NS) **and 3.3L or 3.5L engine (LH)**.
SYMPTOM/CONDITION:
Some vehicles may develop erroneous On Board Diagnostics II (OBD II) multi-cylinder misfire (Hex Code 6A) or cylinder # 2 misfire (Hex Code 6C) or on LH vehicles TPS voltage Does Not Agree With MAP (Hex Code 84) Diagnostic Trouble Codes (DTC's).
DIAGNOSIS:
Using the Mopar Diagnostic System (MDS) or the DRB II (Scan Tool) and appropriate Diagnostic Procedure Manual, verify that all engine systems are functioning as designed. If messages/fault codes (Diagnostic Trouble Codes) are present, record them on the repair order for future reference and repair as necessary. If no Diagnostic Trouble Codes (DTC's) are present, and all systems are functioning correctly, perform the Repair Procedure.
EQUIPMENT/PARTS REQUIRED:
1 CH6000 Scan Tool (DRB III)
1 CH7035 General Purpose Interface Bus Cable (GPIB)
1 CH7000 J1962 Cable
1 4669020 Label - Authorized Software Update
1 4275086 Label - Authorized Modification
NOTE:
The Mopar Diagnostic System is required to perform the following repair and the system must be operating with release 19 or higher and TIL CD release 1094 (NS) **1098 (LH)** or higher must be installed.
REPAIR PROCEDURE:
This bulletin involves reprogramming (flashing) the PCM with new software (calibrations).
1. Connect the MDS (Mopar Diagnostic System) and DRB III (Scan Tool) to the vehicle and power them up.
2. Use the arrow keys and select # 2 MDS DIAGNOSTICS on the DRB III 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 CONTROLLER PROGRAMMING on the MDS, then press NEXT MENU.
5. Use the arrow keys and select PROGRAM CONTROLLER PART on the MDS, then press NEXT MENU.
6. Follow the steps presented on the MDS and DRB III which will allow the DRB III to obtain the current part number of the PCM.
7. The MDS will display the part number of the PCM on the vehicle and the appropriate replacement part number, then press NEXT MENU to begin programming.
If the PCM on the vehicle has already been updated or programmed, a NO UPDATES AVAILABLE message will be displayed. Check the part number of the PCM on the vehicle and compare it to the part number displayed. If the PCM has already been updated, then another condition exists that will require further diagnosis and repair.
8. The MDS and DRB III will prompt for any operator action needed during the remainder of the programming process.
NOTE:
The following steps are required by law.
9. Type the necessary information on the "Authorized Software Update Label" and attach it to the PCM and cover the label with a clear plastic sticker.
10. Type the necessary information on the Authorized Modification Label and attach the label near the under hood Vehicle Emission Control Information (VECI) Label.
POLICY: Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No: **08-19-43-96** 0.5 Hrs.
FAILURE CODE: FM - Flash Module