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TSB 18-05-00 Rev G

1998 Model Year Engine Spark Knock

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Date: Dec. 01, 2000

THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-05-00 REV F,

Models: 1998 BR/BE Ram Truck with gas engine

1998      (AB) Ram Van/Wagon
1998 (AN) Dakota
1998 (BR/BE)      Ram Truck
1998 (DN) Durango
1998 (XJ) Cherokee

NOTE: THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 2.5L (EPE), 3.9L (EHC), 4.0L (ERH), OR 5.9L LIGHT DUTY) EML GASOLINE ENGINE. REFER TO THE TWO TABLES BELOW FOR SPECIFIC APPLICATIONS.

VEHICLE ENGINE TRANSMISSION EMISSIONS CD RELEASE
AB 3.9L A3 Fed and Calif 2069
AB 5.2L A4 Fed and Calif 2069
AB 5.9L A4 Federal Only 2069
AB 5.9L A4 Calif Only 2072
AN 2.5L M5 Fed and Calif 2069
AN 3.9L A4 / M5 Fed and Calif 2069
AN 5.2L A4 / M5 Fed and Calif 2069
BR/BE 3.9L A4 / M5 Fed and Calif 2069
BR/BE 5.2L A4 / M5 Fed and Calif 2069
BR/BE 5.9L A4 / M5 Federal Only 2069
BR/BE 5.9L M5 Calif Only 2069
BR/BE 5.9L A4 Calif Only 2072
DN 5.2L A4 Fed and Calif 2069
DN 5.9L A4 Fed and Calif 2069
XJ 4.0L A4 Fed and Calif 2069
      
Legend: A3 = 3 spd auto A4 = 4 spd auto M5 = 5 spd manual  

NOTE: The following emission packages are not approved and are excluded from this bulletin. The PCM calibration of any excluded vehicle is not to be reprogrammed for a spark knock complaint. Before attempting a reprogramming session inspect the type of vehicle and engine for possible exclusion.

VEHICLE TYPE ENG / TRANS / EMISS
XJ ALL 2.5L / A3 or M5 / Fed or Calif
XJ ALL 4.0L / M5 / Fed or Calif
AN R/T 5.9L / A4 / Fed or Calif
BR/BE ALL 5.9L Heavy Duty (EMM)
BR/BE ALL 8.0L (EWA)
BR/BE 2500 Cab-Chassis 5.9L Lt Duty / A4 / Calif
BR/BE 3500 5.9L Lt Duty / A4 / Calif
BR/BE 3500 Cab-Chassis 5.9L Lt Duty / A4 / Calif

Discussion:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software (calibration level 98Cal12 and 98Cal12C)

Symptoms:
Some vehicle engines may exhibit a light-to-moderate spark knock condition during acceleration (under load).

Diagnosis: 

1. Verify that the following NOTE(S) have been reviewed and completed as necessary.

2. Verify that the engine coolant contains the correct mixture of a quality antifreeze to water. The coolant mixture should consist of 44% to 68% antifreeze.

3. If the only condition seen is the light-to-moderate engine spark knock, perform the Repair Procedure.

NOTE: VERIFY THAT TSB 18-48-98 FOR ENGINE IGNITION WIRE ROUTING, HAS BEEN COMPLETED.

NOTE: THIS FEATURE WILL NOT COMPENSATE FOR HEAVY SPARK KNOCK CONDITIONS. IF HEAVY KNOCK IS EXPERIENCED, FURTHER DIAGNOSIS AND TESTING WILL BE REQUIRED. REFER TO TSB 09-05-00 FOR ADDITIONAL ASSISTANCE.

NOTE: WHEN PULLING A HEAVY LOAD OR DRIVING A FULLY LOADED VEHICLE USE A PREMIUM UNLEADED FUEL TO HELP MINIMIZE SPARK KNOCK.

NOTE: WHENEVER A POWERTRAIN CONTROL MODULE 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 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 2064 OR HIGHER (SEE TABLE ON PAGE ONE).

Repair: 

1.    Log onto the MDS2 system.

2.    Connect the MDS2 (Mopar Diagnostic System) 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.

NOTE: A MESSAGE MAY APPEAR (AFTER STEP 3 OR 4) 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 JTEC PCM and cover the label with the clear plastic overlay.

 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:  08-19-44-92 (Reprogram PCM) ...................................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