MIL - W/Code #76, I/M Failure/Driveability Improvement
NO: 18-04-98GROUP: Vehicle Performance
DATE: Feb. 13, 1998
SUBJECT:
Erroneous MIL Illumination With Hex Code $76, I/M Failure, And Driveability Improvements
MODELS:
1998 (FJ) Avenger/Sebring/Talon
NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 2.0L NATURALLY ASPIRATED (NON-TURBO) ENGINE BUILT BEFORE OCT. 3, 1997 (MDH 1003XX).
SYMPTOM/CONDITION:
1. Erroneous MIL Illumination with DTC Hex $76 - FRONT BANK FUEL SYSTEM RICH.
2. Inspection and Maintenance (l/M) failure due to excessive purge flow.
3. Hesitations, sags, and/or stumble in hot spring/summer ambient temperatures or abnormally warm winter temperatures.
4. Idle or rolling RPM instability at altitudes above 4500 ft. following vehicle refueling or hot spring/summer ambient temperatures or abnormally warm winter temperatures.
NOTE:
IF SYMPTOM 4 IS EXPERIENCED, THE PROPORTIONAL PURGE SOLENOID WILL ALSO REQUIRE REPLACEMENT. USE PIN 048911 28AA.
DIAGNOSIS:
Using the Mopar Diagnostic System (MDS) 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 further with this bulletin. If no DTC's are present or DTC Hex $76 is present, perform the Repair Procedure.
NOTE:
WHENEVER A POWERTRAIN CONTROL MODULE (PCM) 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)
1 CH7035 General Purpose Interface Bus Cable (GPIB)
1 CH7010 J1962 MMC Cable
1 04669020 Label - Authorized Software Update
1 04275086 Label - Authorized Modification
AR(1) 04891128AA Solenoid, Proportional Purge
NOTE:
THE MDS AND DRB III ARE REQUIRED TO PERFORM THIS REPAIR AND THE SYSTEM MUST BE OPERATING WITH RELEASE 21 OR HIGHER AND TIL CD RELEASE 1151 OR HIGHER MUST BE INSTALLED.
REPAIR PROCEDURE:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software (calibration changes) and depending on the symptom experienced replacement of the purge solenoid.
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 (Figure 1). 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 (Figure 2).
11. If symptom 4 is experienced, replace the purge solenoid with p/n 048911 28AA. Use the procedures outlined in the applicable service manual.
POLICY: Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No: 08-19-49-94 Module, Powertrain Control - Reprogram 0.5 Hrs.
Labor Operation No: 25-01-40-94 Solenoid, Proportional Purge - Replace 0.4 Hrs.
FAILURE CODE: FM - Flash Module