Component Description

Seat Control Switch 

The seat control switch contains normally closed contacts (which are grounded). When a specific adjustment position is selected, an individual circuit is switched to voltage.

Seat Track 

There are 2 front seat track bi-directional motors present on power seat tracks. The horizontal (fore/aft) front seat track motor is the only seat track motor which can be serviced separately from the seat track assembly. The other seat track motor (rear up/down) is serviced as part of the seat track assembly. The seat track motors move the power seat forward/backward and up/down depending on the polarity of voltage supplied from the seat control switch.

Seat Backrest 

The seat backrest contains a bi-directional recliner motor which is integral to the seat backrest assembly. The seat backrest motor moves the seat backrest forward/backward depending on the polarity of voltage supplied from the seat control switch.

Front Seat Power Lumbar Assembly 

The front seat power lumbar assembly is mounted to the backrest (serviced as an assembly).

HVAC Module 

The heated seat control switches are part of the HVAC module. The HVAC module supplies a voltage signal to the corresponding driver or passenger heated seat module based upon the selected heat mode (low, medium, high).

Heated Seat Module 

The heated seat module is part of the cushion heater mat assembly (includes heated seat module, cushion heater mat and associated wiring) and cannot be serviced separately. The driver/passenger heated seat module receives voltage from the accessory relay. When commanded by the heated seat control switch, the heated seat module monitors the seat cushion temperature sensor and supplies heater current to the seat cushion and backrest heater mats until the desired setpoint temperature is reached. Once the setpoint temperature is reached, the heated seat module cycles the heater circuits on/off as required to maintain the setpoint temperature.

Backrest Heater Mat 

The cushion and backrest heater mats are connected in series. New backrest foam must be installed when installing a new backrest heater mat. The backrest foam should not be reused.

Cushion Heater Mat 

The cushion heater mat assembly includes the heated seat module, cushion heater mat and associated wiring. The seat cushion heater mat is equipped with a temperature sensor (thermistor) which provides feedback to the heated seat module. The cushion and backrest heater mats are connected in series. New cushion foam must be installed when installing a new cushion heater mat. The cushion foam should not be reused. If a new cushion heater mat is needed on a front passenger seat, install a new OCS service kit with a heater mat already adhered to the cushion foam pad.