Grand Cherokee 2WD V8-4.7L VIN J (2004)
Seat Heater Control Module: Service and Repair
REMOVAL
1. Disconnect and isolate the battery negative cable.
2. Remove the driver side front bucket seat from the power seat track unit. Refer to Bucket Seat Track Adjuster in Body for the procedure.
Heated Seat Module Remove/Install
3. Lift the heated seat module off of the power seat track and disconnect the power seat wire harness connectors.
4. Remove the module from the bracket.
INSTALLATION
1. Install the MHSM,HSM into the bracket.
2. Position the heated seat module and mounting bracket onto the power seat track.
3. Reconnect the power seat wiring harness connectors to the heated seat module.
4. Install the driver side front bucket seat onto the power seat track unit.
5. Reconnect the battery negative cable.
NOTE: If the vehicle is equipped with the optional Memory System, following installation, it will be necessary to initialize the Memory Heated Seat
Module (MHSM). In order to function properly, the MHSM must "learn" the sensor values of each of the power seat motor position transducers in
each of the adjuster hard stop positions. This is done by performing the "Reset Guard Band" procedure using a DRB III scan tool and the proper
Diagnostic Procedures.
WARNING: THE "RESET GUARD BAND" PROCEDURE WILL CAUSE THE DRIVER SIDE FRONT SEAT TO AUTOMATICALLY
ADJUST TO EACH OF ITS TRAVEL LIMITS. BE CERTAIN THAT NO ONE IS SEATED IN THE VEHICLE AND THAT THERE IS
NOTHING IN THE VEHICLE THAT WILL OBSTRUCT SEAT MOVEMENT. FAILURE TO OBSERVE THIS WARNING COULD
RESULT IN PERSONAL INJURIES AND/OR VEHICLE DAMAGE.
