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TSB 18-006-01 REV A

2001 Model Year Engine Spark Knock

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Date: Mar. 02, 2001

Models: 2001 BR/BE Ram Truck with gas engine

2001 (BR/BE) Ram Truck
2001 (DN) Durango

NOTE: THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH PCM SOFTWARE THAT IS EARILER (LESS OR LOWER) THAN THE CALIBRATIONS LISTED IN THE TABLE BELOW. REFER TO THE TWO TABLES BELOW FOR SPECIFIC APPLICATIONS.

VEHICLE ENGINE TRANSMISSION EMISSIONS CD BUILT BEFORE CAL
AB 5.2L A4 Fed and Calif 2077 12/23/00 14
BR/BE 3.9L A4 / M5 Fed and Calif 2072 8/01/00 1ED
BR/BE 5.2L A4 Fed and Calif 2077 12/23/00 1ED or 14
BR/BE 5.9L A4 / M5 Fed and Calif 2078 8/01/00 1ED
DN R/T 5.9L A4 Fed and Calif 2072 10/27/00 13
      
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
BR/BE All 3500 5.9L Lt Duty / A4 or M5 / Fed
BR/BE ALL 5.9L Heavy Duty (EMM)
BR/BE ALL 8.0L (EWA)

Discussion:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software (calibration level 01Cal1ED, 01Cal13, or 01Cal14)

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 understood.

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 and the PCM calibration is earlier (less or lower) than the calibrations listed in the table above, then perform the Repair Procedure.

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

Parts Required:

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

Equipment Required:

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

NOTE. THE MDS2 SYSTEM MUST BE OPERATING AT THE RESPECTIVE CIS CD LEVEL LISTED IN THE FIRST TABLE.

Repair: 

1.    Reprogram the PCM using the MDS2 (Mopar Diagnostic System) and DRB III (Scan Tool).

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.
2.    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.

3.  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