Jeep Grand Cherokee 2002 4WD Laredo V8 4.7L Workshop Manual

jeep :: Jeep Truck Grand Cherokee 4WD Laredo
V8-4.7L (2002)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Accessory Delay Module > Accessory Delay Relay > Component Information > Diagrams

Accessory Delay Relay: Diagrams

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Diagrams > Page 8

Grand Cherokee 4WD Laredo V8-4.7L (2002)

8w-12-2

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Accessory Delay Module > Accessory Delay Relay > Component Information >

Diagrams > Page 9

Grand Cherokee 4WD Laredo V8-4.7L (2002)

8w-12-3

Accessory Delay Relay

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service Bulletins > Customer Interest for Alarm Module: > 08-

020-03 > Jun > 03 > Alarm System - False Alarms When Disarming

Alarm Module: Customer InterestAlarm 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 CDSERIES # 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, thenimmediately 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 Entrytransmitter (key FOB). After the vehicle security system is disarmed, a false alarm of the security system may occur as a door is opened. This conditionmay 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 leftand 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 abovecondition, perform the Repair Procedure.

EQUIPMENT REQUIRED
REPAIR PROCEDURE:

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service

Bulletins > Customer Interest for Alarm Module: > 08-020-03 > Jun > 03 > Alarm System - False Alarms When Disarming > Page 18

Grand Cherokee 4WD Laredo V8-4.7L (2002)

CAUTION:

THE REPROGRAMMING OF THE ITM AND BCM MUST BE PERFORMED IN THE CORRECT SEQUENCE. THE ITM MUST BEREPROGRAMMED FIRST. THE BCM MUST BE REPROGRAMMED IMMEDIATELY AFTER THE ITM HAS BEENSUCCESSFULLY REPROGRAMMED. DO NOT START THE VEHICLE ENGINE OR ENABLE THE VEHICLE THEFT ALARMUNTIL THE BCM HAS BEEN SUCCESSFULLY REPROGRAMMED. FAILURE TO FOLLOW THE REPAIR PROCEDURE AND THISCAUTION 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. TheDRBIII(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). Takeno 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 thecomputer. 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 ingreen, 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 NUMBERINTO 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.

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 ingreen, 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.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service

Bulletins > Customer Interest for Alarm Module: > 08-020-03 > Jun > 03 > Alarm System - False Alarms When Disarming > Page 19

Grand Cherokee 4WD Laredo V8-4.7L (2002)

Carefully follow the instructions on the DRBIII(R) screen and complete the ITM reprogramming process. Power down the ITM by turning theignition switch to the OFF position, and disconnect the DRBIII(R) from the vehicle.

NOTE:

THE PREFERRED METHOD TO SELECT THE CORRECT SOFTWARE IS BY ENTERING THE CURRENT BCM PART NUMBERINTO 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 theignition 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 theBCM. 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 theDRBIII(R), and then verified by turning the headlamps and parking lamps to the OFF position and then turning the ignition key to the RUNposition. 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 BEENREPROGRAMMED.

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 theModule 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

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service Bulletins > Customer Interest for Alarm Module: > 08-

015-03 > Jun > 03 > Alarm System - False Alarms

Alarm Module: Customer InterestAlarm System - False Alarms

NUMBER: 08-015-03
GROUP: Electrical
DATE: Jun. 06, 2003

THIS BULLETIN IS BEING PROVIDED IN ADVANCE. DO NOT ORDER PARTS OR PERFORM ANY ACTIONS RELATED TO THISBULLETIN UNTIL JULY 11, 2003.

SUBJECT:The Intrusion Alarm When In Its Armed Mode May Cause A False Alarm
OVERVIEW:
This bulletin involves installing additional support for the intrusion alarm module by adding either blocks of foam or a support bracket.

MODELS:2002 - 2003

(WG) Grand Cherokee (International Markets)

NOTE:

THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A PREMIUM VEHICLE SECURITY SYSTEM (SALES CODE = LSC).

SYMPTOM/CONDITION:

The customer may state that when the vehicle alarm system is armed (enabled) the siren will activate for no known reason. This condition may be causedby an intrusion alarm module that is too sensitive to certain externally generated vibrations.
DIAGNOSIS:
If the customer has experienced the above condition perform the Repair Procedure.

PARTS REQUIRED

EQUIPMENT REQUIRED

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service

Bulletins > Customer Interest for Alarm Module: > 08-015-03 > Jun > 03 > Alarm System - False Alarms > Page 24

Grand Cherokee 4WD Laredo V8-4.7L (2002)

REPAIR PROCEDURE:
IF VEHICLE DOES NOT HAVE A SUNROOF:

1. Turn the ignition switch to the OFF position.

2. Disconnect the negative battery cable from the negative battery terminal.

3.
Remove the Intrusion Alarm Module (ITM) from the plastic ITM snap ring by depressing the two locking tabs. The locking tabs can be accessedwith a thin blade screw driver through the two small slots on the rear facing side of the ITM. The ITM snap ring remains attached to the headliner.

4. Remove the electrical harness connector from the ITM.

5.
While pulling down on the ITM snap ring, install two foam blocks to the top side of the ITM snap ring. The foam blocks should adhere to the ITMsnap ring and be positioned so that they are between the snap ring and the roof panel. (Fig. 1)

6. Connect the electrical harness connector to the ITM.

7. Install the ITM to the ITM snap ring.

8. Connect the negative battery cable to the battery negative terminal.

9. Set the clock to the correct time.

IF VEHICLE IS EQUIPPED WITH A SUNROOF:

1. Turn the ignition switch to the OFF position.

2. Disconnect the negative battery cable from the negative battery terminal.

3.
Remove the headliner from the vehicle. Refer to the appropriate Grand Cherokee Service Manual for headliner removal and installationprocedures.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service

Bulletins > Customer Interest for Alarm Module: > 08-015-03 > Jun > 03 > Alarm System - False Alarms > Page 25

Grand Cherokee 4WD Laredo V8-4.7L (2002)

4. Temporarily position the metal ITM support bracket, p/n 56010689AA, between the two sunroof crossmembers. (Fig. 2)

5.
Center the ITM support bracket so that it is equal distance from the left and right side of the vehicle. Make alignment marks between the ITMsupport bracket ends and each sunroof crossmember for later bracket installation.

6. Make certain that the edge of the ITM support bracket is seated to the rear sunroof crossmember.

7. Through the holes at the rear edge of the ITM support bracket, mark each location where two holes will need to be drilled for the attaching rivets.

8. Remove the ITM support bracket.

9.
Drill a 3.175 mm (0.125 inch) diameter hole at the two locations that were previously marked on the rear sunroof crossmember. Be careful that thedrill bit does not contact the roof panel.

10.
Cut two 25 mm (1 inch) long pieces from the original 127 mm (5 inch) long piece of foam tape. The two 25 mm (1 inch) pieces of foam tape willbe used to insulate the metal ITM support bracket from the front sunroof crossmember.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service

Bulletins > Customer Interest for Alarm Module: > 08-015-03 > Jun > 03 > Alarm System - False Alarms > Page 26

Grand Cherokee 4WD Laredo V8-4.7L (2002)

11.
Attach a 25 mm (1 inch) piece of foam tape to each metal tab on the ITM support bracket. Once installed the two 25 mm (1 inch) pieces of foamtape should face upward and towards the roof panel. (Fig. 3)

12.
Using the previously made alignment marks, carefully install the front edge of the ITM support bracket to the front sunroof crossmember. Makesure both 25 mm (1 inch) pieces of foam tape are adhered to both the support bracket and crossmember.

13.
Seat the rear edge of the ITM support bracket to the rear sunroof crossmember. Install both attaching rivets. Make certain the correct length rivet isused or damage to the sunroof sliding sunshade panel may occur.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service

Bulletins > Customer Interest for Alarm Module: > 08-015-03 > Jun > 03 > Alarm System - False Alarms > Page 27

Grand Cherokee 4WD Laredo V8-4.7L (2002)

14.

Adhere only one side of the remaining 76 mm (3 inch) piece of the foam tape to the center of the ITM snap ring. The tape should be on the side ofthe snap ring that will face the roof panel and ITM support bracket. Do not remove the remaining protective facing on the foam tape until theheadliner has been installed. (Fig. 4)

15. Clean the surface of the ITM support bracket to insure proper adhesion of the foam tape.

16. Install the headliner to the vehicle. Do not install the Intrusion Alarm Module to the ITM snap ring.

17.
While pulling down on the ITM snap ring, remove the remaining protective facing on the foam tape. Adhere the foam tape to the ITM supportbracket. The ITM snap ring should now be affixed to the new ITM support bracket.

18. Install the Intrusion Alarm Module to the ITM snap ring.

19. Connect the negative battery cable to the battery negative terminal.

20. Set the clock to the correct time.

POLICY:Reimbursable within the provisions of the warranty.

TIME ALLOWANCE

FAILURE CODE

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service Bulletins > All Technical Service Bulletins for Alarm

Module: > 08-020-03 > Jun > 03 > Alarm System - False Alarms When Disarming

Alarm Module: All Technical Service BulletinsAlarm 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 CDSERIES # 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, thenimmediately 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 Entrytransmitter (key FOB). After the vehicle security system is disarmed, a false alarm of the security system may occur as a door is opened. This conditionmay 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 leftand 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 abovecondition, perform the Repair Procedure.

EQUIPMENT REQUIRED
REPAIR PROCEDURE:

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service

Bulletins > All Technical Service Bulletins for Alarm Module: > 08-020-03 > Jun > 03 > Alarm System - False Alarms When Disarming > Page 33

Grand Cherokee 4WD Laredo V8-4.7L (2002)

CAUTION:

THE REPROGRAMMING OF THE ITM AND BCM MUST BE PERFORMED IN THE CORRECT SEQUENCE. THE ITM MUST BEREPROGRAMMED FIRST. THE BCM MUST BE REPROGRAMMED IMMEDIATELY AFTER THE ITM HAS BEENSUCCESSFULLY REPROGRAMMED. DO NOT START THE VEHICLE ENGINE OR ENABLE THE VEHICLE THEFT ALARMUNTIL THE BCM HAS BEEN SUCCESSFULLY REPROGRAMMED. FAILURE TO FOLLOW THE REPAIR PROCEDURE AND THISCAUTION 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. TheDRBIII(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). Takeno 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 thecomputer. 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 ingreen, 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 NUMBERINTO 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.

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 ingreen, 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.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service

Bulletins > All Technical Service Bulletins for Alarm Module: > 08-020-03 > Jun > 03 > Alarm System - False Alarms When Disarming > Page 34

Grand Cherokee 4WD Laredo V8-4.7L (2002)

Carefully follow the instructions on the DRBIII(R) screen and complete the ITM reprogramming process. Power down the ITM by turning theignition switch to the OFF position, and disconnect the DRBIII(R) from the vehicle.

NOTE:

THE PREFERRED METHOD TO SELECT THE CORRECT SOFTWARE IS BY ENTERING THE CURRENT BCM PART NUMBERINTO 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 theignition 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 theBCM. 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 theDRBIII(R), and then verified by turning the headlamps and parking lamps to the OFF position and then turning the ignition key to the RUNposition. 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 BEENREPROGRAMMED.

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 theModule 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

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service Bulletins > All Technical Service Bulletins for Alarm

Module: > 08-015-03 > Jun > 03 > Alarm System - False Alarms

Alarm Module: All Technical Service BulletinsAlarm System - False Alarms

NUMBER: 08-015-03
GROUP: Electrical
DATE: Jun. 06, 2003

THIS BULLETIN IS BEING PROVIDED IN ADVANCE. DO NOT ORDER PARTS OR PERFORM ANY ACTIONS RELATED TO THISBULLETIN UNTIL JULY 11, 2003.

SUBJECT:The Intrusion Alarm When In Its Armed Mode May Cause A False Alarm
OVERVIEW:
This bulletin involves installing additional support for the intrusion alarm module by adding either blocks of foam or a support bracket.

MODELS:2002 - 2003

(WG) Grand Cherokee (International Markets)

NOTE:

THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A PREMIUM VEHICLE SECURITY SYSTEM (SALES CODE = LSC).

SYMPTOM/CONDITION:

The customer may state that when the vehicle alarm system is armed (enabled) the siren will activate for no known reason. This condition may be causedby an intrusion alarm module that is too sensitive to certain externally generated vibrations.
DIAGNOSIS:
If the customer has experienced the above condition perform the Repair Procedure.

PARTS REQUIRED

EQUIPMENT REQUIRED

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service

Bulletins > All Technical Service Bulletins for Alarm Module: > 08-015-03 > Jun > 03 > Alarm System - False Alarms > Page 39

Grand Cherokee 4WD Laredo V8-4.7L (2002)

REPAIR PROCEDURE:
IF VEHICLE DOES NOT HAVE A SUNROOF:

1. Turn the ignition switch to the OFF position.

2. Disconnect the negative battery cable from the negative battery terminal.

3.
Remove the Intrusion Alarm Module (ITM) from the plastic ITM snap ring by depressing the two locking tabs. The locking tabs can be accessedwith a thin blade screw driver through the two small slots on the rear facing side of the ITM. The ITM snap ring remains attached to the headliner.

4. Remove the electrical harness connector from the ITM.

5.
While pulling down on the ITM snap ring, install two foam blocks to the top side of the ITM snap ring. The foam blocks should adhere to the ITMsnap ring and be positioned so that they are between the snap ring and the roof panel. (Fig. 1)

6. Connect the electrical harness connector to the ITM.

7. Install the ITM to the ITM snap ring.

8. Connect the negative battery cable to the battery negative terminal.

9. Set the clock to the correct time.

IF VEHICLE IS EQUIPPED WITH A SUNROOF:

1. Turn the ignition switch to the OFF position.

2. Disconnect the negative battery cable from the negative battery terminal.

3.
Remove the headliner from the vehicle. Refer to the appropriate Grand Cherokee Service Manual for headliner removal and installationprocedures.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service

Bulletins > All Technical Service Bulletins for Alarm Module: > 08-015-03 > Jun > 03 > Alarm System - False Alarms > Page 40

Grand Cherokee 4WD Laredo V8-4.7L (2002)

4. Temporarily position the metal ITM support bracket, p/n 56010689AA, between the two sunroof crossmembers. (Fig. 2)

5.
Center the ITM support bracket so that it is equal distance from the left and right side of the vehicle. Make alignment marks between the ITMsupport bracket ends and each sunroof crossmember for later bracket installation.

6. Make certain that the edge of the ITM support bracket is seated to the rear sunroof crossmember.

7. Through the holes at the rear edge of the ITM support bracket, mark each location where two holes will need to be drilled for the attaching rivets.

8. Remove the ITM support bracket.

9.
Drill a 3.175 mm (0.125 inch) diameter hole at the two locations that were previously marked on the rear sunroof crossmember. Be careful that thedrill bit does not contact the roof panel.

10.
Cut two 25 mm (1 inch) long pieces from the original 127 mm (5 inch) long piece of foam tape. The two 25 mm (1 inch) pieces of foam tape willbe used to insulate the metal ITM support bracket from the front sunroof crossmember.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Technical Service

Bulletins > All Technical Service Bulletins for Alarm Module: > 08-015-03 > Jun > 03 > Alarm System - False Alarms > Page 41

Grand Cherokee 4WD Laredo V8-4.7L (2002)

11.
Attach a 25 mm (1 inch) piece of foam tape to each metal tab on the ITM support bracket. Once installed the two 25 mm (1 inch) pieces of foamtape should face upward and towards the roof panel. (Fig. 3)

12.
Using the previously made alignment marks, carefully install the front edge of the ITM support bracket to the front sunroof crossmember. Makesure both 25 mm (1 inch) pieces of foam tape are adhered to both the support bracket and crossmember.

13.
Seat the rear edge of the ITM support bracket to the rear sunroof crossmember. Install both attaching rivets. Make certain the correct length rivet isused or damage to the sunroof sliding sunshade panel may occur.

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14.

Adhere only one side of the remaining 76 mm (3 inch) piece of the foam tape to the center of the ITM snap ring. The tape should be on the side ofthe snap ring that will face the roof panel and ITM support bracket. Do not remove the remaining protective facing on the foam tape until theheadliner has been installed. (Fig. 4)

15. Clean the surface of the ITM support bracket to insure proper adhesion of the foam tape.

16. Install the headliner to the vehicle. Do not install the Intrusion Alarm Module to the ITM snap ring.

17.
While pulling down on the ITM snap ring, remove the remaining protective facing on the foam tape. Adhere the foam tape to the ITM supportbracket. The ITM snap ring should now be affixed to the new ITM support bracket.

18. Install the Intrusion Alarm Module to the ITM snap ring.

19. Connect the negative battery cable to the battery negative terminal.

20. Set the clock to the correct time.

POLICY:Reimbursable within the provisions of the warranty.

TIME ALLOWANCE

FAILURE CODE

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Alarm Module: Locations

Fig.5 Intrusion Transceiver Module

The Intrusion Transceiver Module is located in the passenger compartment.(ITM)

Fig.9 Siren Remove/Install

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The alarm siren module is located in the right front frame rail.

The SKIM is located in the steering column, below the ignition lock cylinder housing.

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Alarm Module: Diagram Information and Instructions

How to Use Wiring Diagrams

DaimlerChrysler Corporation wiring diagrams are designed to provide information regarding the vehicles wiring content. In order to effectively use thewiring diagrams to diagnose and repair DaimlerChrysler Corporation vehicles, it is important to understand all of their features and characteristics.

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General Information (Part 1 of 2)

Diagrams are arranged such that the power (B+) side of the circuit is placed near the top of the page, and the ground (B-) side of the circuit is placednear the bottom of the page (Fig. 1).

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General Information (Part 2 of 2)

All switches, components, and modules are shown in the at rest position with the doors closed and the key removed from the ignition (Fig. 2).

Components are shown two ways. A solid line around a component indicates that the component is complete. A dashed line around the componentindicates that the component is being shown is not complete. Incomplete components have a reference number to indicate the page where the componentis shown complete.
It is important to realize that no attempt is made on the diagrams to represent components and wiring as they appear on the vehicle. For example, a short

piece of wire is treated the same as a long one. In addition, switches and other components are shown as simply as possible, with regard to function only.

Circuit Functions

Circuit Identification Code Chart

All circuits in the diagrams use an alpha/numeric code to identify the wire and its function. To identify which circuit code applies to a system, refer to theCircuit Identification Code Chart. This chart shows the main circuits only and does not show the secondary codes that may apply to some models.

Circuit Information

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Wire Code Identification

Wire Color Code Chart

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Each wire shown in the diagrams contains a code which identifies the main circuit, part of the main circuit, gauge of wire, and color.

Connector, Ground and Splice Information

CAUTION:

Not all connectors are serviced. Some connectors are serviced only with a harness. A typical example might be the Supplemental RestraintSystem connectors. Always check parts availability before attempting a repair.

IDENTIFICATION

Connectors, grounds, and splices are identified as follows:-

In-line connectors located in the engine compartment are series numbersC100

-

In-line connectors located in the Instrument Panel area are series numbers.C200

-

In-line connectors located in the body are series numbers.C300

-

Jumper harness connectors are series numbers.C400

-

Grounds and ground connectors are identified with a "" and follow the same series numbering as the in-line connectors.G

-

Splices are identified with an "" and follow the same series numbering as the in-line connectors.S

­Component connectors are identified by the component name instead of a number. Multiple connectors on a component use a C1, C2, etc.identifier.

Electrostatic Discharge (ESD) Sensitive Devices

Electrostatic Discharge Symbol

All ESD sensitive components are solid state and a symbol is used to indicate this. When handling any component with this symbol comply with thefollowing procedures to reduce the possibility of electrostatic charge build up on the body and inadvertent discharge into the component. If it is notknown whether the part is ESD sensitive, assume that it is.

1. Always touch a known good ground before handling the part. This should be repeated while handling the part and more frequently after sliding
across a seat, sitting down from a standing position, or walking a distance.

2. Avoid touching electrical terminals of the part, unless instructed to do so by a written procedure.3. When using a voltmeter, be sure to connect the ground lead first.4. Do not remove the part from its protective packing until it is time to install the part.5. Before removing the part from its package, ground the package to a known good ground on the vehicle.

Notes, Cautions and Warnings

Additional important information is presented in three ways: Notes, Cautions, and Warnings.

NOTES

are used to help describe how switches or components operate to complete a particular circuit. They are also used to indicate differentconditions that may appear on the vehicle. For example, an up-to and after condition.

are used to indicate information that could prevent making an error that may damage the vehicle.CAUTIONS

WARNINGS

provide information to prevent personal injury and vehicle damage. Below is a list of general warnings that should be followed any time avehicle is being serviced.

WARNING:

- ALWAYS WEAR SAFETY GLASSES FOR EYE PROTECTION.

- USE SAFETY STANDS ANYTIME A PROCEDURE REQUIRES BEING UNDER A VEHICLE.

­BE SURE THAT THE IGNITION SWITCH ALWAYS IS IN THE OFF POSITION, UNLESS THE PROCEDURE REQUIRES IT TOBE ON.

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­SET THE PARKING BRAKE WHEN WORKING ON ANY VEHICLE. AN AUTOMATIC TRANSMISSION SHOULD BE IN PARK.A MANUAL TRANSMISSION SHOULD BE IN NEUTRAL.

- OPERATE THE ENGINE ONLY IN A WELL-VENTILATED AREA.

- KEEP AWAY FROM MOVING PARTS WHEN THE ENGINE IS RUNNING, ESPECIALLY THE FAN AND BELTS.

­TO PREVENT SERIOUS BURNS, AVOID CONTACT WITH HOT PARTS SUCH AS THE RADIATOR, EXHAUST MANIFOLD(S),TAIL PIPE, CATALYTIC CONVERTER, AND MUFFLER.

­DO NOT ALLOW FLAME OR SPARKS NEAR THE BATTERY. GASES ARE ALWAYS PRESENT IN AND AROUND THEBATTERY.

- ALWAYS REMOVE RINGS, WATCHES, LOOSE HANGING JEWELRY, AND LOOSE CLOTHING.

Symbols

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Wiring Diagram Symbols

International symbols are used throughout the wiring diagrams. These symbols are consistent with those being used around the world (Fig. 3).

Take Outs

The abbreviation is used in the component location section to indicate a point in which the wiring harness branches out to a component.T/O

Terminology

This is a list of terms and definitions used in the wiring diagrams.

LHD ............................................................................................................................................................................................... Left Hand Drive VehiclesRHD ............................................................................................................................................................................................. Right Hand Drive VehiclesATX ................................................................................................................................................................. Automatic Transmissions-Front Wheel DriveMTX ..................................................................................................................................................................... Manual Transmissions-Front Wheel DriveAT ..................................................................................................................................................................... Automatic Transmissions-Rear Wheel DriveMT ........................................................................................................................................................................ Manual Transmissions-Rear Wheel DriveSOHC ..................................................................................................................................................................................... Single Over Head Cam EngineDOHC ................................................................................................................................................................................... Double Over Head Cam EngineBUX ............................................................................................................................................................................................................. Built-Up-ExportBuilt-Up-Export .................................................................................................................. Vehicles Built For Sale In Markets Other Than North America Except Built-Up-Export ........................................................................................................................................ Vehicles Built For Sale In North America

Section Identification and Information

Section Identification

The wiring diagrams are grouped into individual sections. If a component is most likely found in a particular group, it will be shown complete (all wires,connectors, and pins) within that group. For example, the Auto Shutdown Relay is most likely to be found in Group 30, so it is shown there complete. Itcan, however, be shown partially in another group if it contains some associated wiring.

Connector Replacement
REMOVAL

1. Disconnect battery

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Fig. 10 Removal Of Dress Cover

2. Release Connector Lock (Fig. 10).3. Disconnect the connector being repaired from its mating half/component.4. Remove the dress cover (if applicable) (Fig. 10).

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Fig. 11 Examples Of Connector Secondary Terminal Locks

5. Release the Secondary Terminal Lock, if required (Fig. 11).

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Fig. 12 Terminal Removal

6. Position the connector locking finger away from the terminal using the proper special tool. Pull on the wire to remove the terminal from the

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connector (Fig. 12).

INSTALLATION

1. Insert the removed terminal in the same cavity on the repair connector.2. Repeat steps for each terminal in the connector, being sure that all wires are inserted into the proper cavities. For additional connector pin-out
identification, refer to the wiring diagrams.

3. When the connector is re-assembled, the secondary terminal lock must be placed in the locked position to prevent terminal push out.4. Replace dress cover (if applicable).5. Connect connector to its mating half/component.6. Connect battery and test all affected systems.

Diode Replacement
REMOVAL

1. Disconnect the battery.2. Locate the diode in the harness, and remove the protective covering.

Diode Identification

3. Remove the diode from the harness, pay attention to the current flow direction.

INSTALLATION

1. Remove the insulation from the wires in the harness. Only remove enough insulation to solder in the new diode.2. Install the new diode in the harness, making sure current flow is correct. If necessary, refer to the appropriate wiring diagram for current flow (Fig.

13).

3. Solder the connection together using rosin core type solder only Do not use acid core solder.4. Tape the diode to the harness using electrical tape. Make sure the diode is completely sealed from the elements.5. Re-connect the battery and test affected systems.

Terminal Replacement
REMOVAL

1. Follow steps for removing terminals described in Connector Replacement.2. Cut the wire from the back of the connector.6 inches

INSTALLATION

one-half (1/2) inch

1-1/2 inches 2 inches

1. Select a wire from the terminal repair kit that best matches the color and gage of the wire being repaired.2. Cut the repair wire to the proper length and remove of insulation.3. Splice the repair wire to the wire harness (see wire splicing procedure).4. Insert the repaired wire into the connector.5. Install the connector locking wedge, if required, and reconnect the connector to its mating half/component.6. Re-tape the wire harness starting at behind the connector and past the repair.7. Connect battery and test all affected systems.

Wire Splicing
STANDARD PROCEDURE - WIRE SPLICING

When splicing a wire, it is important that the correct gage be used as shown in the wiring diagrams.

one-half (1/2) inch

1. Remove of insulation from each wire that needs to be spliced.2. Place a piece of adhesive lined heat shrink tubing on one side of the wire. Make sure the tubing will be long enough to cover and seal the entire

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repair area.

Fig. 14 Splice Band

3. Place the strands of wire overlapping each other inside of the splice clip (Fig. 14).

Fig. 15 Crimping Tool

4. Using crimping tool, Mopar P/N 05019912AA, crimp the splice clip and wires together (Fig. 15).

Fig. 16 Solder Splice

5. Solder the connection together using rosin core type solder only (Fig. 16).

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DO NOT USE ACID CORE SOLDER.CAUTION:

Fig. 17 Heat Shrink Tube

6. Center the heat shrink tubing over the joint and heat using a heat gun. Heat the joint until the tubing is tightly sealed and sealant comes out of both
ends of the tubing (Fig. 17).

Special Tools

Probing Tool Package 6807

Terminal Pick Tool Set 6680

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Terminal Removing Tools 6932 And 8638

Terminal Removing Tool 6934

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Alarm Module: Diagnostic Aids

Intermittent and Poor Connections
INTERMITTENT AND POOR CONNECTIONS

Most intermittent electrical problems are caused by faulty electrical connections or wiring. It is also possible for a sticking component or relay tocause a problem. Before condemning a component or wiring assembly, check the following items.-

Connectors are fully seated

- Spread terminals, or terminal push out

- Terminals in the wiring assembly are fully seated into the connector/component and locked into position

- Dirt or corrosion on the terminals. Any amount of corrosion or dirt could cause an intermittent problem

- Damaged connector/component casing exposing the item to dirt or moisture

- Wire insulation that has rubbed through causing a short to ground

- Some or all of the wiring strands broken inside of the insulation

- Wiring broken inside of the insulation

Troubleshooting Tests

Fig.6 Electrostatic Discharge Symbol

STANDARD PROCEDURE - ELECTROSTATIC DISCHARGE (ESD) SENSITIVE DEVICES

All ESD sensitive components are solid state and a symbol (Fig. 6) is used to indicate this. When handling any component with this symbol, complywith the following procedures to reduce the possibility of electrostatic charge build up on the body and inadvertent discharge into the component. If itis not known whether the part is ESD sensitive, assume that it is.

1. Always touch a known good ground before handling the part. This should be repeated while handling the part and more frequently after sliding
across a seat, sitting down from a standing position, or walking a distance.

2. Avoid touching electrical terminals of the part, unless instructed to do so by a written procedure.3. When using a voltmeter, be sure to connect the ground lead first.4. Do not remove the part form it's protective packing until it is time to install the part.5. Before removing the part from it's package, ground the package to a known good ground on the vehicle.

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Fig.7 Testing For Voltage Potential

STANDARD PROCEDURE - TESTING FOR VOLTAGE POTENTIAL

1. Connect the ground lead of a voltmeter to a known good ground (Fig. 7).2. Connect the other lead of the voltmeter to the selected test point. The vehicle ignition may need to be turned ON to check voltage. Refer to the
appropriate test procedure.

STANDARD PROCEDURE - TESTING FOR CONTINUITY

1. Remove the fuse for the circuit being checked or, disconnect the battery.

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Fig.8 Testing For Continuity

2. Connect one lead of the ohmmeter to one side of the circuit being tested (Fig. 8).3. Connect the other lead to the other end of the circuit being tested. Low or no resistance means good continuity.

STANDARD PROCEDURE - TESTING FOR A SHORT TO GROUND

1. Remove the fuse and disconnect all items involved with the fuse.2. Connect a test light or a voltmeter across the terminals of the fuse.3. Starting at the fuse block, wiggle the wiring harness about apart and watch the voltmeter/test lamp.6 - 8 inches

4. If the voltmeter registers voltage or the test lamp glows, there is a short to ground in that general area of the wiring harness.

STANDARD PROCEDURE - TESTING FOR A SHORT TO GROUND ON FUSES POWERING SEVERAL LOADS

1. Refer to the wiring diagrams and disconnect or isolate all items on the suspected fused circuits.2. Replace the blown fuse.3. Supply power to the fuse by turning ON the ignition switch or re-connecting the battery.4. Start connecting or energizing the items in the fuse circuit one at a time. When the fuse blows the circuit with the short to ground has been isolated.

Fig.9 Testing For Voltage Drop

STANDARD PROCEDURE - TESTING FOR A VOLTAGE DROP

Troubleshooting Tools

When diagnosing a problem in an electrical circuit there are several common tools necessary. These tools are listed and explained below.

Jumper Wire

This is a test wire used to connect two points of a circuit. It can be used to bypass an open in a circuit.

WARNING: NEVER USE A JUMPER WIRE ACROSS A LOAD, SUCH AS A MOTOR, CONNECTED BETWEEN A BATTERYFEED AND GROUND.

Voltmeter

Used to check for voltage on a circuit. Always connect the black lead to a known good ground and the red lead to the positive side of the circuit.

CAUTION:

Most of the electrical components used in today's vehicles are Solid State. When checking voltages in these circuits, use a meter witha or greater impedance rating.10 mega-ohm

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1. Connect the positive lead of the voltmeter to the side of the circuit closest to the battery (Fig. 9).2. Connect the other lead of the voltmeter to the other side of the switch, component or circuit.3. Operate the item.4. The voltmeter will show the difference in voltage between the two points.

Ohmmeter

Used to check the resistance between two points of a circuit. Low or no resistance in a circuit means good continuity.

CAUTION:

10 mega-ohm

Most of the electrical components used in today's vehicles are Solid State. When checking resistance in these circuits use a meterwith a or greater impedance rating. In addition, make sure the power is disconnected from the circuit. Circuits that are powered upby the vehicle's electrical system can cause damage to the equipment and provide false readings.

Fig. 4 Probing Tool

Probing Tools

These tools are used for probing terminals in connectors (Fig. 4). Select the proper size tool from Special Tool Package 6807, and insert it into theterminal being tested. Use the other end of the tool to insert the meter probe.

Troubleshooting Wiring Problems

When troubleshooting wiring problems, there are six steps which can aid in the procedure. The steps are listed and explained below. Always check fornonfactory items added to the vehicle before doing any diagnosis. If the vehicle is equipped with these items, disconnect them to verify these add-onitems are not the cause of the problem.

1. Verify the problem.2. Verify any related symptoms. Do this by performing operational checks on components that are in the same circuit. Refer to the wiring diagrams. 3. Analyze the symptoms. Use the wiring diagrams to determine what the circuit is doing, where the problem most likely is occurring, and where the
diagnosis will continue.

4. Isolate the problem area.5. Repair the problem.6. Verify proper operation. For this step, check for proper operation of all items on the repaired circuit.

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Intrusion Transceiver Module (Export Only)

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Alarm Module: Service Precautions

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERINGWHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATETHE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TODISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THEAIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENTAND POSSIBLE PERSONAL INJURY.

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Alarm Module: Description and Operation
INTRUSION TRANSCEIVER MODULE

Fig.5 Intrusion Transceiver Module

(ITM) (VTA)

(VTSS)

An Intrusion Transceiver Module is part of the premium version of the Vehicle Theft Alarm in the Vehicle Theft Security System . The premium version of the VTA is only available in vehicles built for certain markets, where the additional features offered by thissystem are required. The ITM is located in the passenger compartment. This unit is designed to provide interior motion detection, and serve as aninterface between the Body Control Module and the alarm siren module.(BCM)

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Fig.6 Intrusion Transceiver Module

The ITM is concealed beneath a dedicated molded plastic trim cover that approximates the size and shape of a typical dome lamp housing.However, rather than a lens, the ITM features three sets of louvered openings. One set of louvered openings is located at each outboard end of thecenter rib, while the third set is centered. Each of the louvered openings is covered on the inside by a sight shield that extends the length of thecenter rib. The module is secured to a mounting bracket above the headliner.

Concealed within the housing is the circuitry of the ITM which includes a microprocessor, and an ultrasonic receive transducer. Both the transmittransducer on the right side of the module and the receive transducer on the ITM circuit board are aimed through two small round holes in the sightshield of the trim cover. The ITM is connected to the vehicle electrical system by a take out and connector of the overhead wire harness that isintegral to the headliner.
The ITM unit cannot be adjusted or repaired and, if faulty or damaged, it must be replaced. The ITM is serviced as a unit with the trim cover.

(OBD)

(PCI)

The microprocessor in the Intrusion Transceiver Module (ITM) contains the motion sensor logic circuits and controls all of the features of thepremium version of the Vehicle Theft Alarm (VTA). The ITM uses On-Board Diagnostics and can communicate with other modules in thevehicle as well as with the DRB III scan tool using the Programmable Communications Interface data bus network. This method ofcommunication is used by the ITM to communicate with the Body Control Module (BCM) and for diagnosis and testing. The ITM alsocommunicates with the alarm siren over a dedicated serial bus circuit.

(RKE) fifteen seconds

The ITM microprocessor continuously monitors inputs from its on-board motion sensor as well as inputs from the BCM and the alarm sirenmodule. The ITM motion sensor transmits ultrasonic signals into the vehicle cabin through a transmit transducer, then listens to the returningsignals as the bounce OFF of objects in the vehicle interior. If an object is moving in the interior, a detection circuit in the ITM senses thismovement through the modulation of the returning ultrasonic signals that occurs due to the Doppler effect. The motion detect function of the ITMcan be disabled by depressing the "Lock" button on the Remote Keyless Entry transmitter three times within , while thesecurity indicator is still flashing rapidly or by cycling the key in the driver door cylinder from the center to the lock position. The ITM will signalthe alarm siren module to provide a single siren "chirp" as an audible confirmation that the motion sensor function has been disabled.

If movement is detected, the ITM sends an message to the BCM over the PCI data bus to flash the exterior lighting and send a message to the alarm siren module over a dedicated serial bus line to sound the siren. When the BCM detects a breach in the perimeter protection through a door,tailgate, flip-up glass, or hood ajar switch input, it sends an message to the ITM and the ITM sends an message to the BCM over the PCI data busto flash the exterior lighting and send a message to the alarm siren module over a dedicated serial bus line to sound the siren. The ITM alsomonitors inputs from the alarm siren module for siren battery or siren input/output circuit tamper alerts, and siren battery condition alerts, then setsactive and stored Diagnostic Trouble Codes (DTC) for any monitored system faults it detects. An active fault only remains for the current ignitionswitch cycle, while a stored fault causes a DTC to be stored in memory by the ITM. If a fault does not reoccur for fifty ignition cycles, the ITMwill automatically erase the stored DTC.

The ITM is connected to the vehicle electrical system through the overhead wire harness. The ITM receives battery voltage on a B(+) circuitthrough a fuse in the Junction Block (JB), and is grounded to the chassis at G303. These connections allow the ITM to remain operational,regardless of the ignition switch position. The hard wired inputs and outputs for the ITM may be diagnosed and tested using conventionaldiagnostic tools and procedures. However, conventional diagnostic methods will not prove conclusive in the diagnosis of the ITM, the PCI databus network, or the electronic message inputs to and outputs from the ITM. The most reliable, efficient, and accurate means to diagnose the ITM,the PCI data bus network, and the message inputs to and outputs from the ITM requires the use of a DRB III scan tool. Refer to the appropriatediagnostic information.

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Fig.9 Siren Remove/Install

SIREN

An alarm siren module is part of the premium version of the Vehicle Theft Alarm (VTA) in the Vehicle Theft Security System (VTSS). Thepremium version of the VTA is only available in vehicles built for certain markets, where the additional features offered by this system arerequired. The alarm siren module is located in the right front frame rail. This unit is designed to provide the audible alert requirements for thepremium VTA.

The alarm siren module consists of microprocessor, the siren, and a nickel metal hydride backup battery. All of the alarm module components areprotected and sealed within the housing.
The alarm siren module cannot be repaired or adjusted and, if faulty or damaged, it must be replaced.

The microprocessor within the alarm siren module provides the siren unit features and functions based upon internal programming and arm anddisarm messages received from the Intrusion Transceiver Module (ITM) over a dedicated serial bus communication circuit. The alarm sirenmodule will self-detect problems with its internal and external power supply and communication circuits, then send messages indicating theproblem to the ITM upon receiving a request from the ITM. The ITM will store a Diagnostic Trouble Code (DTC) for a detected alarm sirenmodule fault that can be retrieved with the DRB III scan tool over the Programmable Communications Interface (PCI) data bus.

When the premium version of the Vehicle Theft Alarm (VTA) is armed, the alarm siren module continuously monitors inputs from the ITM formessages to sound its siren and enters its auto-detect mode. While in the auto-detect mode, if the alarm siren module detects that its power supplyor communication circuits are being tampered with or have been sabotaged, it will sound an alarm and continue to operate through its on-boardbackup battery If the arm siren module is in its disarmed mode when its power supply or communication circuits are interrupted, the siren will notsound. The alarm module will also notify the ITM when the backup battery requires charging, and the ITM will send a message that will allow thebackup battery to be charged through the battery voltage and ground circuits to the alarm module only when the ignition switch is in the ONposition and the engine is running. This will prevent the charging of the alarm backup battery from depleting the charge in the main vehicle batterywhile the vehicle is not being operated.

(PDC)

The alarm siren module receives battery voltage through a fuse in the Power Distribution Center , and is grounded to the chassis. Theseconnections allow the alarm siren module to remain operational, regardless of the ignition switch position. The hard wired inputs and outputs forthe alarm siren module may be diagnosed and tested using conventional diagnostic tools and procedures. However, conventional diagnosticmethods will not prove conclusive in the diagnosis of the internal circuitry or the backup battery of the alarm siren module, the ITM, the serial buscommunication line, or the message inputs to and outputs from the alarm siren module. The most reliable, efficient, and accurate means todiagnose the alarm siren module, the ITM, the serial bus communication line, and the electronic message inputs to and outputs from the alarmsiren module requires the use of a DRB III scan tool. Refer to the appropriate diagnostic information.

SENTRY KEY IMMOBILIZER MODULE

(SKIM) (SKIS)

The Sentry Key Immobilizer Module is the primary component of the Sentry Key Immobilizer System . The SKIM is located inthe steering column, below the ignition lock cylinder housing. The SKIM has an integral halo-like antenna ring that extends from one side.
The SKIM cannot be adjusted or repaired. If faulty or damaged, the entire SKIM unit must be replaced.

(RF)

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Grand Cherokee 4WD Laredo V8-4.7L (2002)

(PCM) (EMIC)

The Sentry Key Immobilizer Module (SKIM) contains a Radio Frequency transceiver and a microprocessor. The SKIM transmits RF signalsto, and receives RF signals from the Sentry Key transponder through a tuned antenna ring integral to the SKIM housing. If this antenna ring is notmounted properly around the ignition lock cylinder housing, communication problems between the SKIM and the transponder may arise. Thesecommunication problems will result in Sentry Key transponder-related faults. The SKIM also communicates over the ProgrammableCommunications Interface (PCI) data bus with the Powertrain Control Module , the ElectroMechanical Instrument Cluster , the Body Control Module , and/or the DRB III scan tool.(BCM)

(VIN)

The SKIM retains in memory the ID numbers of any Sentry Key transponder that is programmed into it. A maximum of eight transponders can beprogrammed into the SKIM. For added system security, each SKIM is programmed with a unique Secret Key code. This code is stored in memory,sent over the PCI data bus to the PCM, and is encoded to the transponder of every Sentry Key that is programmed into the SKIM. Another securitycode, called a PIN, is used to gain access to the SKIM Secured Access Mode. The Secured Access Mode is required during service to perform theSKIS initialization and Sentry Key transponder programming procedures. The SKIM also stores the Vehicle Identification Number in itsmemory which it learns through a PCI data bus message from the PCM during SKIS initialization.

In the event that a SKIM replacement is required, the Secret Key code can be transferred to the new SKIM from the PCM using the DRB III scantool and the SKIS replacement procedure. Proper completion of the SKIS initialization will allow the existing Sentry Keys to be programmed intothe new SKIM so that new keys will not be required. In the event that the original Secret Key code cannot be recovered, SKIM replacement willalso require new Sentry Keys. The DRB III scan tool will alert the technician during the SKIS replacement procedure if new Sentry Keys arerequired.

When the ignition switch is turned to the ON position, the SKIM transmits an RF signal to the transponder in the ignition key. The SKIM thenwaits for an RF signal response from the transponder. If the response received identifies the key as valid, the SKIM sends a valid key message tothe PCM over the PCI data bus. If the response received identifies the key as invalid, or if no response is received from the key transponder, theSKIM sends an invalid key message to the PCM. The PCM will enable or disable engine operation based upon the status of the SKIM messages. Itis important to note that the default condition in the PCM is an invalid key; therefore, if no message is received from the SKIM by the PCM, theengine will be disabled and the vehicle immobilized after of running.two seconds

three seconds

The SKIM also sends indicator light status messages to the EMIC over the PCI data bus to tell the EMIC how to operate the SKIS indicator. Thisindicator light status message tells the EMIC to turn the indicator ON for about each time the ignition switch is turned to the ONposition as a bulb test. After completion of the bulb test, the SKIM sends indicator light status messages to the EMIC to turn the indicator OFF,turn the indicator ON, or to flash the indicator ON and OFF. If the SKIS indicator lamp flashes or stays ON solid after the bulb test, it signifies aSKIS fault. If the SKIM detects a system malfunction and/or the SKIS has become inoperative, the SKIS indicator will stay ON solid. If the SKIMdetects an invalid key or if a key transponder-related fault exists, the SKIS indicator will flash. If the vehicle is equipped with the Customer Learntransponder programming feature, the SKIM will also send messages to the EMIC to flash the SKIS indicator lamp, and to the BCM to generate asingle audible chime tone whenever the Customer Learn programming mode is being utilized. (Refer to ELECTRICAL/VEHICLE THEFTSECURITY - STANDARD PROCEDURE - SENTRY KEY TRANSPONDER PROGRAMMING).

(DTC's)

The SKIS performs a self-test each time the ignition switch is turned to the ON position, and will store fault information in the form of DiagnosticTrouble Codes in SKIM memory if a system malfunction is detected. The SKIM can be diagnosed, and any stored DTC's can be retrievedusing a DRB III scan tool. Refer to the appropriate diagnostic information.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Service and Repair > Intrusion Transceiver Module Replacement

Alarm Module: Service and RepairIntrusion Transceiver Module Replacement
REMOVAL

1. Disconnect and isolate the battery negative cable.

Fig.7 Intrusion Transceiver Module Remove

2. While pulling downward lightly on the rear corner of the Intrusion Transceiver Module trim cover, insert a small thin-bladed screwdriver(ITM)

through each of the service holes on the rear edge of the trim cover to release the two integral rear latch features of the module from the mountingbracket above the headliner.

3. Pull the ITM trim cover rearward far enough to disengage the two front latch features of the module from the mounting bracket above the
headliner.

4. Pull the ITM and trim cover down from the headliner far enough to access and disconnect the overhead wire harness connector for the ITM from
the module connector.

5. Remove the ITM from the headliner.

INSTALLATION

1. Position the Intrusion Transceiver Module (ITM) to the headliner.2. Reconnect the overhead wire harness connector for the ITM to the module connector.

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Intrusion Transceiver Module Replacement > Page 72

Grand Cherokee 4WD Laredo V8-4.7L (2002)

Fig.8 Intrusion Transceiver Module Retainer Ring

3. Align the two front latch features of the ITM with the two front latch receptacles of the mounting bracket above the headliner.4. Push the ITM trim cover forward far enough to insert the two rear latch features of the module into the two rear latch receptacles of the mounting
bracket above the headliner.

5. Push upward firmly and evenly on the rear edge of the ITM trim cover until the two rear latch features of the module are engaged and latched in
the mounting bracket above the headliner.

6. Reconnect the battery negative cable.

NOTE:

If the Intrusion Transceiver Module (ITM) has been replaced with a new unit, the new ITM MUST be initialized before the Vehicle TheftSecurity System can operate as designed. The use of a DRB III scan tool is required to initialize the ITM. Refer to the appropriate diagnosticinformation.

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Alarm Module: Service and RepairSiren Replacement
REMOVAL

1. Disconnect and isolate the battery negative cable.

Fig.9 Siren Remove/Install

2. Disconnect the alarm siren module wiring harness connector..3. Remove the screws that secure the alarm siren module to the left frame rail.4. Remove the alarm siren module.

INSTALLATION

NOTE:

(ITM)

If the alarm siren module has been replaced with a new unit, the new unit MUST be configured in the Intrusion Transceiver Module before the Vehicle Theft Security System can operate as designed. The use of a DRB III scan tool is required to configure the alarm siren modulesettings in the ITM. Refer to the appropriate diagnostic information.

6 Nm (50 in. lbs.)

1. Position the alarm siren module on to the left frame rail..2. Install and tighten the screws that secure the alarm siren module to the frame rail. Tighten the screws to .3. Reconnect the alarm siren module wiring harness connector.4. Reconnect the battery negative cable.

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Alarm Module: Service and RepairSentry Key Immobilizer Module Replacement
REMOVAL

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANYSTEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECTAND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEMCAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TODISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAGDEPLOYMENT AND POSSIBLE PERSONAL INJURY.

1. Disconnect and isolate the battery negative cable.2. Remove the steering column opening cover from the instrument panel.3. Disconnect the instrument panel wire harness connector from the SKIM connector.

Fig.16

4. Remove the screw that secures the SKIM to the bottom of the steering column housing.5. Disengage the antenna ring of the SKIM from around the ignition lock cylinder housing.6. Remove the SKIM from the steering column.

INSTALLATION

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANYSTEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECTAND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEMCAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TODISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAGDEPLOYMENT AND POSSIBLE PERSONAL INJURY.

3.4 Nm (30 in lbs.)

1. Position the SKIM to the underside of the steering column.2. Engage the antenna ring of the SKIM around the ignition lock cylinder housing.3. Install and tighten the screw that secures the SKIM to the bottom of the steering column housing. Tighten the screw to .4. Reconnect the instrument panel wire harness connector to the SKIM connector.5. Reinstall the steering column opening cover onto the instrument panel.6. Reconnect the battery negative cable.7. Perform the SKIS Replacement procedure using the DRB III.8. Perform the SKIS Initialization Procedure using the DRB III.

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Antenna Module (Built-Up-Export)