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TSB 18-12-99

DRB III Leak Detection Pump (LDP) Monitor Test

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Date: June 18, 1999

THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-17-97, DATED MAY 2,1997, WHICH SHOULD BE REMOVED FROM YOUR FILES AND NOTED IN THE 1997 TECHNICAL SERVICE BULLETIN MANUAL

Models: 1997-1999 BR/BE

1997 -1999 (AB) Ram Van
1997 -1999 (AN) Dakota
1997 - 1999 (BR/BE) Ram Truck
1998 - 1999 (DN) Durango
1997 - 1999 (FJ) Avenger/Sebring
1997 - 1999 (JA) Cirrus/Stratus/Breeze
1997 - 1999 (JX) Sebring Convertible
1997 - 1999 (LH) lntrepid/Concorde/Vision/LHS/300M
1996 - 1999 (NS) Town & Country/Caravan/Voyager
1997 - 1999 (PL) Neon
1997 - 1999 (PR) Prowler
1997 - 1999 (SR) Viper/Viper Coupe
1997 - 1999 (TJ) Wrangler 1999 (WJ) Grand Cherokee
1997 - 1999 (XJ) Cherokee

NOTE: THIS INFORMATION APPLIES TO VEHICLES EQUIPPED WITH A LEAK DETECTION PUMP (LDP).

Overview:

This bulletin explains the operation and application of the LDP - MONITOR TEST. The LDP is now incorporated in the 1999 PCM and older models can be flashed to be updated.

Discussion:

The original test (LDP Dealer Test Mode) functionality was eliminated in the DRB III. A new test has been released (LDP-MONITOR TEST) and is now incorporated into the Powertrain Control Module (PCM) software. The DRB III" can actuate this test by sending simple commands to the PCM.

Most new model (1997) vehicles were released with this test capability. Older models may require a flash update to make this test available. Most of the older model software has been released.

The best way to determine if the test is available is to connect the DRB III and attempt to run the LDP Monitor Test found under ENGINE SYSTEM TESTS.

If the DRB III" does not show the test on the screen, or if a message appears - LDP Monitor Test NOT Supported by PCM, it means the vehicle will require a flash update to make the test available. As mentioned earlier, most of the software with this feature has been released. If a flash update is not available and the vehicle is LDP equipped, standard LDP leak test procedures as listed in the applicable diagnostic publications will have to be performed until the software becomes available.

As a reminder, the LDP MONITOR TEST should only be used to reproduce leak faults and verify repairs that have been made to the evaporative system.

EQUIPMENT REQUIRED:

1     CH6000            Scan Tool (DRB III)
1     CH7035            General Purpose Interface Bus Cable (GPIB)

1     CH7000/7001   J1962 Cable

1     CH7010            J1962 MMC Cable

1 (AR) CH8361       Super Card 2

TEST PROCEDURE:

1.    Connect the DRB III (scan tool) to the vehicle and power it up.

2.    From the MAIN MENU, select DRB III standalone.

3.    From the STAND-ALONE MAIN MENU, select 1998 - 2000 Diagnostics.

NOTE: FOR EARLIER MODELS, SUPERCARD 2 MUST BE USED FOR DIAGNOSIS.

4.    From the SELECT SYSTEM screen, select ENGINE.

5.    Press enter twice to go to the SELECT FUNCTION screen.

6.    From the SELECT FUNCTION screen, select Engine System Test.

7.    From the ENGINE SYSTEM TEST screen, select LDP Monitor Test.

8.    Once in the LDP Monitor Test, the DRB III"' will prompt the operator for the remaining test sequence.

notes:

Policy: Information only


Thanks to Bob Bergevin for supplying this TSB information

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This page was edited on: May 3, 2004