TSB 21-14-99

47RE Transmission - Harsh Or Early Shifts

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Date: Nov. 5,1999

Models: 2000 (BR/BE) Ram Truck

NOTE:    THIS INFORMATION APPLIES TO VEHICLES EQUIPPED WITH A 5.9L - 24V DIESEL ENGINE AND 47RE AUTOMATIC TRANSMISSION BUILT BEFORE ENGINE SERIAL NUMBER 56624822 WITH A DATE OF MANUFACTURE OF AUGUST 28,1999. THIS INFORMATION IS AVAILABLE ON THE ENGINE DATA PLATE, WHICH IS LOCATED ON THE LEFT SIDE OF THE ENGINE, AFFIXED TO THE GEAR HOUSING.

Overview:

This bulletin involves selectively erasing and reprogramming the Cummins CM551 Engine Control Module (ECM) with new software (calibration change 00Cal57T9A). There is no change to the JTEC PCM software.

Symptom/Condition:

Some early built 2000 model year Ram Trucks may experience a harsh 3-4 shift. This condition may occur during any throttle position situation when transmission sump temperatures are 150C (60"F) or higher. The harsh 3-4 shift may be more pronounced during heavy vehicle loading, e.g. trailer towing.

Some 2000 M.Y vehicles may also experience an early 1-2 or 2-3 shift condition during wide open throttle (WOT) situations. This condition may have an impact on vehicle performance (acceleration). This condition may occur when transmission sump temperatures are OOC (32"F) or higher.

Changes to the Cummins CM551 engine control module (ECM) software/calibration corrects the above two conditions.

NOTE:    ALL APPLICABLE VEHICLES BROUGHT IN FOR ANY MAINTENANCE MUST HAVE THIS FLASH PROCEDURE PERFORMED.

Diagnosis:

Drive the vehicle in a safe area and manner. With the Diagnostic Scan Tool (DRB 111") connected to the vehicle, perform five (5) vehicle accelerations at wide open throttle. Determine the engine rpm when the 1-2 and 2-3 shifts occur.

NOTE:    DO NOT USE THE VEHICLE TACHOMETER TO DETERMINE ENGINE RPM AT TIME OF SHIFT.

If the engine speed is less than 3,000 rpm during the 1-2 or 2-3 shift, or if there is a complaint of a harsh 3-4 shift, then continue with the following Diagnosis.

Verify that the transmission throttle valve cable is adjusted properly.

Using the Mopar Diagnostic System (MDS2) and/or the Diagnostic Scan Tool (DRS 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 other DTC's are present, and 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 CONTROLLER MUST BE VERIFIED FOR THE LATEST REVISION LEVEL. USE THE FLASH PROCEDURE TO UPDATE REPLACED CONTROLLERS AS NECESSARY.

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 DRBIII ARE REQUIRED TO PERFORM PART OF THIS REPAIR. WHEN USING THE MDS2 AND THE DRB III THE SYSTEM MUST BE OPERATING AT CIS CD 2045 OR HIGHER.

Repair:

1.    Log onto the MDS2 system.

2.    Connect the MDS2 (Mopar Diagnostic System) and DRB 1110 (Scan Tool) to the vehicle and switch the ignition key to "ON".

3.    Use the arrow keys and select #2 CONNECT TO MDS1 OR MDS2 on the DRB III MAIN MENU SCREEN.

4.    Use the arrow keys and select #2 RUN MDS2 APPLICATION on the DRB III MAIN MENU SCREEN.  

NOTE:    ONCE MDS2, DFIB III, AND VEHICLE COMMUNICATION HAS BEEN ESTABLISHED, THE "CANNOT READ VIN FROM DRB III" MESSAGE (ON THE MDS) 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.    Push the FLASH tab on the MDS2.

NOTE:    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.

6.    Select READ PART NUMBERS FROM VEHICLE and click SHOW UPDATES on the MDS2.

NOTE:    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.    DRB III will prompt for any operator action needed during the remainder of the reprogramming process.

NOTE:    DUE TO THE PCM FLASH PROCEDURE, A DTC MAY BE SET IN OTHER MODULES (EATX, BCM, MIC, SKIM) WITHIN THE VEHICLE IF SO EQUIPPED. SOME MAY CAUSE THE MIL TO ILLUMINATE. ALL DTC'S RELATE TO A LOSS OF COMMUNICATIONS WITH THE MODULE THAT IS BEING FLASHED. 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" 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.

10.   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.

TIMEALLOWANCE:
Labor Operation No: 08-19-43-93 ........................................... 0.5 Hrs.

FAILURE CODE: FM - Flash Module  

This page was edited on: May 3, 2004