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TSB 18-10-98

OBD 11 Misfire Indicator

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Date: Feb 27, 1998

NOTE:    THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-26-97, DATED AUG. 15,1997 WHICH SHOULD BE REMOVED FROM YOUR FILES.

Models: 1998 BR/BE Ram Truck

1997-1998    AN   Dakota
1998              BE Ram Truck (Quad and Club Cab)
1998              BR Ram Truck

NOTE: THIS BULLETIN APPLIES TO TRUCKS BUILT BEFORE AND INCLUDING THE FOLLOWING DATES: 11TH POSITION OF VIN G (SALTILLO), J (ST LOUIS), M (LAGO) AUG. 20,1997 (MDH 0820XX) - S (DODGE CITY) AUG. 19,1997 (MDH 0819xx) AND ALL 1997 AN MODELS

This information applies to all gasoline equipped models except heavy duty emission 5.9L federal and heavy duty emission 5.0L federal packages. The VECI label can be inspected to see if the 5.9L or 8.0L applies to this action. The VECI label can be inspected to see if the 5.9L or 8.0L applies to this action. The VECI code sequence for these heavy duty emission models will be WCRXH08*0BAl for 8.0L and WCRXH05*9BAl for 5.9L. The highlighted H designates heavy duty. The location of the label for 5.9L is on the air cleaner and 8.0L on the air pump bracket. No diesel vehicles apply to this action.

Discussion:

The above model trucks with gasoline engines will not illuminate the MIL properly when misfire is detected. The software within the powertrain control module has been revised to correct an OBD II system monitor that is noncompliant based on misfire requirements set forth by the Federal Government and C.A.R.B..

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

Parts:

NOTE: THE MDS AND DRB III ARE REQUIRED TO PERFORM PART OF THIS REPAIR AND THE SYSTEM MUST BE OPERATING WITH RELEASE 21 OR HIGHER AND TIL CD RELEASE 1152 OR HIGHER MUST BE INSTALLED.

Repair:

This Procedure involves selectively erasing and reprogramming the PCM with new software (calibration change).

1.    Connect the MDS (Mopar Diagnostic System) and DRS III (Scan Tool) to the vehicle and power them up.

2.    Use the arrow keys and select #2 MDS DIAGNOSTICS on the DRB III MAIN MENU Screen.

3.    Use the arrow keys and select DIAGNOSTIC MENU on the MDS, then press NEXT MENU.

4.    Use the arrow keys and select VEHICLE CONTROLLER PROGRAMMING on the MDS, then press NEXT MENU.

5.    Use the arrow keys and select PROGRAMMING OF ALL OTHER CONTROLLERS USING MDS & DRB III on the MDS, then press NEXT MENU,

6.    Follow the steps presented on the MDS and DRS III which will allow the DRB III to obtain the current part number of the PCM

7.    The MDS will display the part number of the PCM on the vehicle and the appropriate replacement part number, then press NEXT MENU to begin programming.

If the PCM on the vehicle has already been updated or programmed, a NO UPDATES AVAILABLE message will be displayed. Check the part number of the PCM on the vehicle and compare it to the part number displayed. If the PCM has already been updated, then another condition exists that will require further diagnosis and repair

8.    The MDS and DRB III will prompt for any operator action needed during the remainder of the programming process.

NOTE: THE FOLLOWING STEPS ARE REQUIRED BY LAW

9.    Type or print necessary info on the "Authorized Software Update" label (Fig 1) and attach it to the ECM. Cover the label with clear tape.

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.

TIME ALLOWANCE:
Labor Operation No: 08-19-49-98 ................. 0.5 Hrs.

FAILURE CODE: FM - Flash Module


 

Thanks to Bob Bergevin for providing this TSB information

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This page was edited on: May 3, 2004