Heated Seat System

Individually controlled, electrically heated front seats are available as factory-installed equipment on this model. Vehicles with this option can be visually identified by the two separate heated seat switches mounted on each of the seat cushion side shields. The heated seat system allows the front seat driver and passenger to select from two different levels of supplemental electrical seat heating, or no seat heating to suit their individual comfort requirements.

Front Seats Equipped With Airbag:

WARNING: SOME VEHICLES ARE EQUIPPED WITH SEATBACK MOUNTED AIRBAGS. BEFORE ATTEMPTING TO DIAGNOSE OR SERVICE ANY SEAT OR POWER SEAT SYSTEM COMPONENT YOU MUST FIRST DISCONNECT AND ISOLATE THE BATTERY NEGATIVE CABLE. THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACITOR TO DISCHARGE BEFORE FURTHER SYSTEM SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO DO SO COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

The heated seat system for this vehicle includes the following major components, which are described in further detail later :
- Heated Seat Elements - Four heated seat elements are used per vehicle, two for each front seat. One heating element in the seat back and one in the seat cushion. The heated seat sensor is integral to the seat cushion heating element. The heated seat elements are integral to the front seat and seat back cushions. Refer to heated seat elements later for additional information.
- Heated Seat Module - One heated seat module is used per vehicle. The module is mounted under the driver seat cushion pan, near the forward edge of the seat. Refer to heated seat module in the electronic control modules for additional information.
- Heated Seat Relay - One heated seat relay is used per vehicle. The relay is located in the junction block and is responsible for distributing the voltage (B+) to the heated seat system.
- Heated Seat Sensors - Two heated seat sensors are used per vehicle, one for each front seat. The heated seat sensors are integral to each of the heated seat element assemblies. Refer to heated seat sensor later for additional information.
- Heated Seat Switches - Two heated seat switches are used per vehicle, one for each front seat. The switches are mounted to each of the outboard front seat cushion side shields.

Hard wired circuitry connects the heated seat system components to each other through the electrical system of the vehicle. These hard wired circuits are integral to wire harnesses, which are routed throughout the vehicle and retained by many different methods. These circuits may be connected to each other, to the vehicle electrical system and to the heated seat system components through the use of a combination of soldered splices, splice block connectors and different types of wire harness terminal connectors. The wiring information includes wiring diagrams, proper wire and connector repair procedures, further details on wire harness routing and retention, as well as pin-out and location views for the various wire harness connectors, splices and grounds.

The heated seat system is designed to provide individually controlled, supplemental heat to the seat cushion and seat back surfaces of both front seats. Because this system converts electrical current to heat, the heated seat system can provide a measure of warm comfort almost immediately upon entering a cold vehicle, rather than having to wait for the engine coolant to reach sufficient temperature to deliver heat through the conventional heater system. This system allows each front seat occupant to individually select one of two comfort levels, Hi or Lo, or to turn the heater for their seat off.

The heated seat system components operate on battery current received through a fuse in the Junction Block (JB) on a fused ignition switch output (run-acc) circuit so that the system will only operate when the ignition switch is in the On or Accessory positions. The heated seat system will be turned Off automatically whenever the ignition switch is turned to any position except On or Accessory. Also, the heated seat system will not operate when the surface temperature of the seat cushion cover at either heated seat sensor is above the designed temperature set points of the system. The heated seat system has a self-diagnostic capability. When certain failures are detected within the heated seat system, the system will provide a visual indication of the failure by flashing the Light Emitting Diode (LED) indicator lamps located in the heated seat switches. See the owner's manual in the vehicle glove box for more information on the features, use and operation of the heated seat system.