Heated Seats

WARNING: THE FRONT PASSENGER SEAT ASSEMBLY CONTAINS CRITICAL COMPONENTS THAT AFFECT THE FRONT PASSENGER AIRBAG DEPLOYMENT. CORRECTLY FUNCTIONING FRONT PASSENGER SEAT COMPONENTS ARE CRITICAL FOR THE OCCUPANT CLASSIFICATION SYSTEM (OCS) TO PROPERLY CLASSIFY THE FRONT PASSENGER AND CALCULATE THE PROPER AIRBAG DEPLOYMENT. UNAPPROVED MODIFICATIONS OR SERVICE PROCEDURES TO THE FRONT PASSENGER SEAT ASSEMBLY, ITS RELATED COMPONENTS, OR TRIM COVER MAY INADVERTENTLY CHANGE THE AIRBAG DEPLOYMENT IN CASE OF A FRONTAL CRASH. THIS COULD RESULT IN DEATH OR SERIOUS INJURY TO THE FRONT SEAT PASSENGER IF THE VEHICLE IS INVOLVED IN AN ACCIDENT.

The following requirements must be strictly adhered to:
- Do not modify the front passenger seat assembly or components in any way.
- Do not modify the front seat center console or center position seat in any way.
- Do not use prior or future model year seat trim covers not designated for the specific model being repaired. always use the correct seat trim cover specified for the vehicle.
- Do not replace the seat trim cover with an aftermarket trim cover.
- Do not add a secondary trim cover other than those approved by daimlerchrysler mopar.
- At no time should any supplemental restraint system (srs) component or srs related component or fastener be modified or replaced with any part except those which are approved by daimlerchrysler/mopar.

Vehicles with the heated seat option can be visually identified by the two heated seat switches located in the center stack of the instrument panel. The heated seat system allows the driver and front seat passenger to select from two different levels of electrical seat heating (HI/LO). The heated seat system for this vehicle includes the following major components, which are described in further detail later :
- Heated Seat Switches - Two heated seat switches are used per vehicle. One switch is used for each front seat. The switches are mounted in the instrument panel, below the radio. Each switch also includes two Light-Emitting Diode (LED) indicator lamps and an incandescent back lighting bulb.
- Heated Seat Module - This module contains the solid state electronic control and diagnostic logic circuitry for the heated seat system. One heated seat module is used per vehicle and is mounted under the drivers front seat cushion.
- Heated Seat Elements - Four heated seat elements are used per vehicle. One element is used for each front seat back and one element and sensor assembly is used for each front seat cushion. The heating elements are integral to the individual front seat and seat back cushions and cannot be removed once installed at the factory. Replacement seat heating elements are available, without having to replace the entire seat cushion or trim cover.
- Heated Seat Sensors - Two heated seat sensors are used per vehicle. One heated seat temperature sensor is used for each front seat cushion. The sensors are integral to the individual front seat cushion heating elements and cannot be removed once installed at the factory. Replacement seat heating elements with the sensors are available, without having to replace the entire seat cushion or trim cover.

The heated seat module receives fused battery current through the Integrated Power Module. The heated seat switches receive battery current from the Cab Compartment Node (CCN) only when the ignition switch is in the On position and the engine is running. The heated seat module shares a common ground circuit with each of the heated seat elements. The heated seat system will control the surface temperature of the seat cushion to within the designed temperature set points of the system.

The heated seat system will also automatically turn off whenever the ignition switch is turned to any position except On, or if the engine quits running. If the ignition switch is turned to the Off position or if the engine quits running while a heated seat is ON, the heated seat will remain Off after the engine is restarted until a heated seat switch is depressed again. This helps prevent the vehicles battery from being drained by the heated seat system.

The heated seat module monitors inputs from the heated seat sensors and the heated seat switches. In response to these inputs the heated seat module uses its internal programming to control 12v to the heated seat elements in both front seats and to control the heated seat LED indicator lamps located in both of the heated seat switches. The heated seat module is also programmed to provide self-diagnostics, if a problem with the heated seat system is detected. If the module detects certain failures within the heated seat system, it will provide a visual indication of the failure by flashing the indicator lamps in the appropriate heated seat switch. The heated seat module will automatically turn off the heated seat elements if it detects a short or open in the heated seat element circuit or a heated seat sensor value that is out of range.