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TSB 18-36-97

Incorrect Fault Mature Time - DTC $B7 Leak Detection Pump Solenoid Circuit

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Date: Dec. 31, 1997

Models: 1998 BR/BE Ram with gasoline engines built prior to Nov 20, 1997 (MDH 1120XX)

1998 (AB) Ram Van/Wagon
1998 (AN) Dakota
1998 (BR/BE) Ram Truck
1998 (DN) Durango
1998 (SR) 1998 Viper Roadster/Coupe
1898 (TJ) Wrangler
1998 (XJ) Cherokee
1998 (ZJ) Grand Cherokee

NOTE: THIS BULLETIN APPLIES TO VEHICLES WITH 5.2L ENGINES BUILT PRIOR TO NOV. 20,1997 (MDH 112OXX) AND SALES CODE NAE (CALIFORNIA EMISSIONS)..

Symptom/Condition:

Hex code $B7 - LEAK DETECTION PUMP SOLENOID CIRCUIT is a one trip DTC. Its purpose is to detect electrical shorts or opens in the LDP solenoid circuit. The time it takes for this DTC to mature has been determined to take too long.

Diagnosis:

Using the Mopar Diagnostic System (MDS) or the Diagnostic Scan Tool (DRB 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 DTC's or those listed above are present and any of the above symptoms have been experienced, perform the Repair Procedure.

NOTE:  Whenever a PCM is replaced due to failure, the software of the replacement controller should be verified for the latest revision level.

Equipment/Parts Needed:

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 1147 OR HIGHER MUST BE INSTALLED.

Repair:

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

NOTE: FOR XJ VEHICLES EQUIPPED WITH AN AISIN WARNER TRANSMISSION, DTC $BE (CCD MESSAGE FROM JTEC FAILURE) CAN BE SET WITHIN THE EATX MODULE DUE TO THE PCM FLASH AND THE DTC GENERATED WITHIN THE EATX MAY SET DTC $89 (EATX CONTROLLER DTC PRESENT) WITHIN THE PCM. CHECK FOR AND ERASE THESE FAULTS PRIOR TO RETURNING THE VEHICLE TO THE CUSTOMER.

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: 08-19-48-97 ................. 0.5 Hrs.

FAILURE CODE: FM - Flash Module


Thanks to Bob Bergevin and Barry Drodge for supplying this TSB information

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This page was edited on: May 3, 2004