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TSB 18-015-00 Rev. A

Driveability Enhancements For Winter Fuel Use and For Hard Starts

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Date: Dec. 21, 2000

Models: 1998 - 2001 (BR/BE) Ram Truck with diesel engine

NOTE. THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 5.9L-24V DIESEL ENGINE BUILT ON OR BETWEEN ENGINE SERIAL NUMBERS 56419738 TO 56798357, WITH A DATE OF MANUFACTURE OF DEC 16,1997 TO NOV 15, 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.

Discussion:
This bulletin involves selectively erasing and reprogramming the Cummins CM551 Engine Control Module (ECM) with new software (calibration versions- 55Tl8, 57T11A, 57Tl1B, 56Tl3, 59T6). There is no change to the JTEC PCM software.

Symptoms:
The customer may complain of poor driveability when winter fuel is used to power the engine. Or, the customer may complain of a hard or no-start condition, while the engine is at normal operating temperatures, 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.

NOTE: IF TSB 18-024-00 HAS PREVIOUSLY BEEN PERFORMED TO THE VEHICLE IN QUESTION, THEN THE ECM SOFTWARE HAS ALREADY BEEN REVISED WITH THE CORRECT CALIBRATION TO ADDRESS THE ABOVE CONDITION(S). THE ECM WILL NOT REQUIRE REPROGRAMMING.

Diagnosis: 
Using the Mopar Diagnostic System (MDS2) and or the Diagnostic Scan Tool (DRB III@), 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 DTC's are present, and the above symptom has been experienced, perform the Repair Procedure.

Parts Required:

1    04669020 Label,   Authorized Software Update
1    04275086 Label,   Authorized Modification

Equipment Required:

1   CH6000              Scan Tool   (DRB III)
1   CH7035             General Purpose Interface Bus Cable (GPIB)
1   CH7000/7001    J1962 Cable
1                             MDS2

NOTE. THE MDS2 AND DRB III ARE REQUIRED TO PERFORM PART OF THIS REPAIR. WHEN USING THE MDS2 AND THE DRB III, THE SYSTEM MUST BE OPERATING AT CIS CD 2073 OR HIGHER.

Repair: 

1.    Log onto the MDS2 (Mopar Diagnostic System).

2.    Connect the MDS2 and DRB III (Scan Tool) to the vehicle and switch the ignition key to "ON".

NOTE: AUTO CONNECTION WILL OCCUR ONCE THE DRB III, MDS2, AND VEHICLE ESTABLISH COMMUNICATION. THE "CANNOT READ VIN FROM DRB III 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.

3.   Select the FLASH tab on the MDS2.

4.   Select READ PART NUMBERS FROM VEHICLE and click SHOW UPDATES on the MDS2. Press the "OK" button.

NOTE: IN ABOVE STEPS #3 OR #4, 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.

5.   Select the new software part number with the light pen and click UPDATE CONTROLLER SOFTWARE.

6.   The MDS2 and DRB III will prompt for any operator action needed during the remainder of the reprogramming process.

NOTE: DUE TO THE PCM REPROGRAMMING PROCEDURE, A DTC MAY BE SET IN OTHER MODULES (TCM, 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.
7.    Type the necessary information on the "Authorized Software Update Label" p/n 04669020 (Figure 1). Attach the label to the CUMMINS CM551 ECM and cover the label with the clear plastic overlay. Do not attach the label to the JTEC PCM.

8.  Type or print the following information on the Authorized Modification Label and attach the label near the VECI label (Fig 2).

 

Notes: 

Policy:    Reimbursable within the provisions of the warranty.

Time Allowance:
Labor Operation No:  08-19-45-90 ................................... 0.5 Hrs.

Failure Code:  FM - Flash Module


Thanks to Bob Bergevin for supplying this TSB information

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This page was edited on: May 3, 2004