Heated Seat System: Description

Vehicles with the heated seat option can be visually identified by the two heated seat switches located in the front door trim panels. A second set of heated seat switches are located in the rear seat center console. The front door trim panel mounted switches control the front seats, while the rear console mounted switches control the second row seats. The heated seat system allows the driver, front seat passenger and 2nd row seat passengers 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 in this section:

• Heated Seat Elements  - Eight heated seat elements are used per vehicle, two for each heated seat. Two heated seat elements are integral to each seat, one in the seat back and the other in the seat cushion. All heated seat cushion elements contain integral heated seat sensors. See HEATED SEAT ELEMENTS .
• Heated Seat Modules  - Two heated seat modules are used per vehicle. A Memory Heated Seat Adjustable Pedal Module (MHSAPM) is mounted under the drivers seat cushion pan. This module controls the two front heated seats as well as other vehicle functions. A second heated seat module is located in the 2nd row seat center console and it is used to control the 2nd row heated seats. Refer to Memory Heated Seat Adjustable Pedal Module in ELECTRONIC CONTROL MODULES for additional information.
• Heated Seat Sensors  - Four heated seat sensors are used per vehicle, one for each heated seat. The heated seat sensors are integral to each of the heated seat cushion elements. Refer to HEATED SEAT ELEMENTS  for additional information.
• Heated Seat Switches  - Four heated seat switches are used per vehicle, one for each heated seat. One switch assembly is mounted in each of the front door trim panels. The driver side switch assembly is used to control the heated seat, power/memory seat and adjustable foot pedal systems. The passenger side switch assembly is used to control the heated seat and power seat systems. The 2nd row heated seat switches are mounted in the 2nd row seat center console. The 2nd row switches are used to control the 2nd row heated seat system only. Refer to HEATED SEAT SWITCHES  for additional information. Refer to driver and passenger seat switches in POWER SEAT SYSTEM for additional information.
• Door Modules  - A door module is concealed behind the trim panel of each front door. The module on the driver side is referred to as the Driver Door Module (DDM), while the module on the passenger side is the Passenger Door Module (PDM). The DDM and PDM each utilize integrated circuitry and information carried on the Programmable Communications Interface (PCI) data bus network. In regards to the front seat heated seat system, the door modules communicate between the front seat heated seat switch assemblies and the memory heated seat adjustable pedal module. The door modules are not used in the 2nd row heated seat system. Refer to ELECTRONIC CONTROL MODULES for additional information.

Refer to SYSTEM WIRING DIAGRAMS for complete heated seat system wiring schematics. The wiring information also includes the proper wire and connector repair procedures, further details on wire harness routing and retention, as well as electrical connector pin-out and location views.