Alarm System - False Alarms When Disarming
NUMBER: 08-020-03GROUP: Electrical
DATE: Jun. 27, 2003
THIS BULLETIN IS BEING PROVIDED IN ADVANCE. THE DRBIII(R) MUST BE AT LEVEL 56, AND ISIS MUST BE OPERATING AT CD SERIES # 2136 OR HIGHER AVAILABLE EARLY AUGUST 2003.
SUBJECT:
The Intrusion Alarm When Disarmed Using The Key FOB May Cause A False Alarm
OVERVIEW:
This bulletin involves a special coordinated reprogramming (flash) process. The Intrusion Transceiver Module (ITM) must be reprogrammed first, then immediately followed by the reprogramming of the Body Control Module (BCM).
MODELS:
2002 - 2003 (WG) Grand Cherokee (International Markets)
NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH THE PREMIUM VEHICLE SECURITY SYSTEM (SALES CODE = LSC).
SYMPTOM/CONDITION:
A customer may experience a false alarm by the vehicle security system after the security system has been disarmed by use of the Remote Keyless Entry transmitter (key FOB). After the vehicle security system is disarmed, a false alarm of the security system may occur as a door is opened. This condition may occur intermittently.
This condition may be caused by a communication problem between the Intrusion Transceiver Module (ITM) and the Body Control Module (BCM).
DIAGNOSIS:
1. From inside the vehicle visually verify that the vehicle is equipped with a ITM. The ITM is attached to the headliner and centered between the left and right "B" pillar. Do not perform the Repair Procedure on vehicles that are not equipped with an Intrusion Transceiver Module.
2. Using the DRBIII(R), verify that the ITM software version level is less than 7.05 and that the BCM software version level is less than 4.6.
3. If the ITM and BCM software version levels stated in Step 2 are less than 7.05 and 4.6 respectively, and the customer experiences the above condition, perform the Repair Procedure.
EQUIPMENT REQUIRED
REPAIR PROCEDURE:
CAUTION:
THE REPROGRAMMING OF THE ITM AND BCM MUST BE PERFORMED IN THE CORRECT SEQUENCE. THE ITM MUST BE REPROGRAMMED FIRST. THE BCM MUST BE REPROGRAMMED IMMEDIATELY AFTER THE ITM HAS BEEN SUCCESSFULLY REPROGRAMMED. DO NOT START THE VEHICLE ENGINE OR ENABLE THE VEHICLE THEFT ALARM UNTIL THE BCM HAS BEEN SUCCESSFULLY REPROGRAMMED. FAILURE TO FOLLOW THE REPAIR PROCEDURE AND THIS CAUTION MAY CAUSE IRREPARABLE HARM TO EITHER MODULE.
1. Using the DRBIII(R), obtain and record the current ITM and BCM part numbers.
2. Use the null modem cable to connect the DRBIII(R) to the computer with the Benchtop Programmer / DRBIII(R) Winflash II application. The DRBIII(R) must be at version level 56.0 or higher.
3. Remove any PCMCIA card from the DRBIII(R).
4. From the DRBIII(R) Main Menu, select Run Memory Card Program (Option 5), and then select Attempt Serial Communications (Option 1). Take no action when the DRBIII(R) screen displays the following messages: No Memory Card Detected, Attempting Serial Communications Link, Press Page Back To Exit.
5. Using ISIS CD Series # 2136 or later series, reinstall or upgrade the existing Benchtop Programmer / DRBIII(R) Winflash II application on the computer. The installation and User's guides are located on the ISIS CD under the Software Help folder for additional assistance.
6. Launch the computer Benchtop Programmer/ DRBIII(R) Winflash II application.
7. Click on the computer Mode menu and select DRBIII(R) Winflash. The DRBIII(R) Winflash application should display the following words in green, DRB Connected.
8. Either enter the ITM part number (preferred and obtained earlier), or use the following criteria to select the flash from the drop down list:
a. Select 2002 or 2003 Model Year.
b. Select WG Body Style.
c. Select Engine.
NOTE:
THE PREFERRED METHOD TO SELECT THE CORRECT SOFTWARE IS BY ENTERING THE CURRENT ITM PART NUMBER INTO THE ISIS BENCHTOP PROGRAMMER / DRBIII(R) WINFLASH II APPLICATION.
9. Select the desired ITM Flash update (ITM02V0705 = Standalone Version of 7.05) from the table grid list on the computer.
10. Click the Download button on the computer to send the file to the DRBIII(R).
11. Connect the DRBIII(R) to the vehicle and select Vehicle Flash (Option 7) from the DRBIII(R) Main Menu.
12. Carefully follow the instructions on the DRBIII(R) screen and complete the ITM reprogramming process. Power down the ITM by turning the ignition switch to the OFF position, and disconnect the DRBIII(R) from the vehicle.
NOTE:
IF THE REPROGRAMMING SESSION FOR THE ITM HAS BEEN SUCCESSFUL, THEN IMMEDIATELY REPROGRAM THE BCM. DO NOT START THE VEHICLE ENGINE. DO NOT ENABLE OR ARM THE VEHICLE SECURITY SYSTEM/ITM.
13. Launch the computer Benchtop Programmer / DRBIII(R) Winflash II application.
14. Click on the computer Mode menu and select DRBIII(R) Winflash. The DRBIII(R) Winflash application should display the following words in green, DRB Connected.
15. Either enter the BCM part number (preferred and obtained earlier), or use the following criteria to select the flash from the drop down list:
a. Select 2002 or 2003 Model Year.
b. Select WG Body Style.
c. Select Engine.
NOTE:
THE PREFERRED METHOD TO SELECT THE CORRECT SOFTWARE IS BY ENTERING THE CURRENT BCM PART NUMBER INTO THE ISIS BENCHTOP PROGRAMMER / DRBIII(R) WINFLASH II APPLICATION.
16. Select the desired BCM Flash update (BCMWJGV046 = Standalone Version of 4.6) from the table grid list on the computer.
17. Click the Download button on the computer to send the file to the DRBIII(R).
18. Connect the DRBIII(R) to the vehicle and select Vehicle Flash (Option 7) from the DRBIII(R) Main Menu.
19. Carefully follow the instructions on the DRBIII(R) screen and complete the BCM reprogramming process. Power down the BCM by turning the ignition switch to the OFF position.
20. Cycle the ignition key at least twice, from OFF to RUN, to allow the BCM to learn.
21. Perform the following BCM tasks:
a. Reset country code setting in the BCM. Perform this operation even if the current country code is correct. This procedure will reset the BCM. The country code setting is available in the DRBIII(R) Standalone Menu / Body Menu / Miscellaneous Menu.
b. Cycle the ignition key at least twice, from OFF to RUN, to allow the BCM to learn.
c. Verify that the EU DRL (European Day Time Running Lights) feature is disabled. If necessary, this feature can be disabled with the DRBIII(R), and then verified by turning the headlamps and parking lamps to the OFF position and then turning the ignition key to the RUN position. In this mode, the headlamps and/or parking lamps should not be illuminated if the EU DRL has been disabled.
NOTE:
THE VEHICLE THEFT SECURITY SYSTEM (VTSS) AND ITM MUST BE ENABLED ONCE THE ITM AND BCM HAVE BEEN REPROGRAMMED.
22. From the DRBIII(R) Main Menu select DRBIII(R) Standalone (Option 1).
23. From the Standalone Main Menu select 1998 - 2004 Diagnostics (Option 1).
24. From the 1998 - 2004 Diagnostic Menu select ALL (Except Below) (Option 1).
25. From the Select System Menu select Theft Alarm (Option 7).
26. From the Anti-Theft Systems Menu select VTSS (Option 1). Press ENTER to by-pass transient screen displays.
27. From the Select Function Menu select Module Display (Option 3). Verify that the ITM S/W Version is 07.05. Press the Page Back key to exit the Module Display Menu.
28. From the Select Function Menu select Miscellaneous (Option 9).
29. From the Miscellaneous Function Menu select Configure ITM (Option 1). Follow the DRBIII(R) instructions for enabling the ITM.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE
FAILURE CODE