Grand Cherokee 2WD Limited V8-4.7L (2002)
Body Control Module: Customer Interest
Alarm System - False Alarms When Disarming
NUMBER: 08-020-03
GROUP: 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.
