PCM - Intermittent Misfire/Or MIL ON/No DTC's Set
NO: 18-15-97GROUP: Vehicle Performance
DATE: Apr. 11, 1997
SUBJECT:
Intermittent Misfire And/Or MIL Illumination With No DTC's
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-33-96, DATED NOV. 15, 1996, WHICH SHOULD BE REMOVED FROM YOUR FILES AND NOTED IN THE 1996 TECHNICAL SERVICE BULLETIN MANUAL (PUBLICATION NO. 81-699-97010). ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE ADDITIONAL NOTES AND VEHICLE APPLICATION CHANGES.
MODELS:
1996 (SR) Viper Roadster/**Coupe**
SYMPTOM/CONDITION:
One or all of the following symptoms may be experienced:
1. Intermittent hesitation between 4 and 5 thousand RPM.
2. Intermittent Malfunction Indicator Light (MIL) with no Diagnostic Trouble Codes (DTC's).
DIAGNOSIS:
Using the Mopar Diagnostic System (MDS) or the Scan Tool (DRBIII) and appropriate Diagnostic Procedures Manual, verify that all engine 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 and any of the above symptoms have been experienced, perform the Repair Procedure.
**NOTE:
WHENEVER A POWERTRAIN CONTROL MODULE (PCM) IS REPLACED, DUE TO FAILURE, THE SOFTWARE OF THE REPLACEMENT PCM SHOULD BE VERIFIED FOR THE LATEST REVISION LEVEL.**
EQUIPMENT/PARTS REQUIRED:
1 CH6000 Scan Tool (DRB III)
1 CH7035 General Purpose Interface Bus Cable (GPIB)
1 CH7000/7001 J1962 Cable
1 04669020 Label - Authorized Software Update
1 04275086 Label - Authorized Modification
NOTE:
MDS AND DRBIII ARE REQUIRED TO PERFORM THE FOLLOWING REPAIR. MDS MUST BE OPERATING WITH RELEASE 21 OR HIGHER AND TIL 1128 OR HIGHER INSTALLED.
REPAIR PROCEDURE:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software (calibration changes) for all conditions listed.
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 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 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, p/n 04669020. Attach the label to the PCM and cover the label with the clear plastic overlay.
10. Type the necessary information on the Authorized Modification Label p/n 04275086 and attach the label near the VECI Label.
POLICY: Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No: 08-19-46-98 0.5 Hrs.
FAILURE CODE: FM - Flash Module