ECM - Poor Driveability/Hard Engine Restart
NUMBER: 18-15-00GROUP: Vehicle Performance
DATE: Sept. 8, 2000
SUBJECT:
Driveability Enhancements With Winter Fuel Use And For Hard Hot Engine Restarts
0VERVIEW:
This bulletin involves selectively erasing and reprogramming the Cummins CM551 Engine Control Module (ECM) with new software (calibration versions: 57T11A, 5711B, 56T13). There is no change to the JTEC PCM software.
MODELS:
1999 - 2001 (BR/BE) Ram Truck
NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 5.9L-24V DIESEL ENGINE BUILT ON OR BETWEEN ENGINE SERIAL NUMBERS 56478845 TO 56744082, WITH A DATE OF MANUFACTURE OF JULY 8, 1998 TO JUNE 29, 2000. THIS INFORMATION IS AVAILABLE ON THE ENGINE DATA PLATE, WHICH IS LOCATED ON THE LEFT SIDE OF THE ENGINE, AFFIXED TO THE GEAR HOUSING.
SYMPTOM/CONDITION:
The customer may complain of poor driveability when winter fuel is used to power the engine. The customer may complain of a no start or a hard hot engine restart condition when using any type of good quality diesel fuel.
The poor driveability condition may occur only when either straight # 1 diesel fuel is used or when other special cold climate winter blend fuels are in use.
The no start or long engine crank condition may occur when attempting to restart the engine while the temperature of the engine is still close to its normal operating temperature. This hard hot restart condition may be experienced in all ambient climates, but may be more of a concern in warmer ambient climates.
DIAGNOSIS:
Using the Mopar Diagnostic System (MDS2) and or the Diagnostic Scan Tool (DRB III(R), with the appropriate Diagnostic Procedures Manual, verify that all engine and 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 DIC's are present, and the above symptom has been experienced, perform the Repair Procedure.
NOTE:
WHENEVER AN ENGINE CONTROL MODULE (ECM) IS REPLACED DUE TO FAILURE, THE SOFTWARE OF THE REPLACEMENT CONTROLLER MUST BE VERIFIED FOR THE LATEST REVISION LEVEL. USE THE FLASH PROCEDURE TO UPDATE REPLACED CONTROLLERS AS NECESSARY.
PARTS REQUIRED:
EQUIPMENT REQUIRED:
NOTE:
THE MDS2 AND DRB III(R) ARE REQUIRED TO PERFORM PART OF THIS REPAIR. WHEN USING THE MDS2 AND THE DRB III(R), THE SYSTEM MUST BE OPERATING AT CIS CD 2066 OR HIGHER.
REPAIR PROCEDURE:
1. Log onto the MDS2 system.
2. Connect the MDS2 and DRB III(R) to the vehicle and switch the ignition key to "ON".
3. Use the arrow keys and select # 2 CONNECT TO MDS2 on the DRB III(R) MAIN MENU SCREEN.
4. Use the arrow keys and select # 2 RUN MDS2 APPLICATION on the DRB III(R) MAIN MENU SCREEN.
NOTE:
ONCE MDS2, DRB III(R), AND VEHICLE COMMUNICATION HAS BEEN ESTABLISHED, THE "CANNOT READ VIN FROM DRB III(R)" MESSAGE (ON THE MDS2) WILL BE REPLACED BY THE VEHICLE VIN. PRESS THE "OK" BUTTON ON THE MDS2 TO REQUEST A MDS2 SESSION FOR THE VEHICLE VIN INDICATED. PRESS THE "OK" BUTTON WHEN ASKED TO BEGIN SESSION.
5. Select the FLASH tab on the MDS2.
6. Select READ PART NUMBERS FROM VEHICLE and click SHOW UPDATES on the MDS2. Press the "OK" button.
NOTE:
IN ABOVE STEPS # 5 AND/OR # 6, A MESSAGE MAY APPEAR THAT INDICATES NO UPDATES ARE AVAILABLE. IF THIS OCCURS, MAKE SURE YOUR DIAGNOSTIC EQUIPMENT IS OPERATING AT THE LATEST SOFTWARE LEVEL AS LISTED EARLIER IN THIS BULLETIN. IF THE LATEST SOFTWARE IS INSTALLED, AND NO UPDATES ARE AVAILABLE, ANOTHER VEHICLE CONDITION EXISTS THAT WILL REQUIRE FURTHER INVESTIGATION.
7. Select the new software part number with the light pen and click UPDATE CONTROLLER SOFTWARE.
8. The MDS2 and DRB III(R) will prompt for any operator action needed during the remainder of the reprogramming process.
NOTE:
DUE TO THE ECM REPROGRAMMING PROCEDURE, A DTC MAY BE SET IN OTHER MODULES (PCM, BCM, MIC, SKIM, ETC.) WITHIN THE VEHICLE IF SO EQUIPPED. SOME DTC'S MAY CAUSE THE MIL TO ILLUMINATE. ALL DTC'S RELATE TO A LOSS OF COMMUNICATIONS WITH THE MODULE THAT IS BEING REPROGRAMMED. CHECK ALL MODULES, RECORD THE FAULTS, AND ERASE THESE FAULTS PRIOR TO RETURNING THE VEHICLE TO THE CUSTOMER. ERASE ANY FAULTS IN THE PCM ONLY AFTER ALL OTHER MODULES HAVE HAD THEIR FAULTS ERASED.
NOTE:
THE FOLLOWING STEPS ARE REQUIRED BY LAW.
9. Type the necessary information on the "Authorized Software Update Label" pin 04669020 (Figure 1). Attach the label to the CUMMINS ECM and cover the label with the clear plastic overlay. Do not attach the label to the JTEC PCM.
10. 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:
FAILURE CODE: FM - Flash Module