Heated Seats - Description

DESCRIPTION

NOTE: LHD shown. RHD similar.





The front heated seat switches (3 and 4) are momentary contact push button type switches that are mounted in the A/C-heater control (1), located in the center of the instrument panel. These switches allow the driver and front seat passenger to select from two different levels of electrical seat heating (high and low). Amber Light Emitting Diodes (LEDS) (2 and 5) in each switch indicate the level of heat in use: Two LEDs illuminate for high, one for low, and none for off. Pressing a heated seat switch once will select high-level heating. Pressing the same switch a second time will select low-level heating. Pressing the switch a third time will shut off the heating elements in the seat. The front heated seat switches send a request signal to the Cabin Compartment Node (CCN) over the Controller Area Network (CAN) bus.





Vehicles with the rear heated seat option can be visually identified by the two heated seat switches (3) located in the sliding door trim panels (6). The sliding door trim panel mounted switches control the 2nd row heated seats. These switches allow the 2nd row seat passengers to select from two different levels of electrical seat heating (high and low). The rear heated seat switches send a hardwired resistance signal to the rear door modules.

The heated seat system for this vehicle also includes the following major components:

- Heated Seat Elements - Eight carbon fiber 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.

CAUTION: On vehicles equipped with heated cloth seats the heating elements are an integral part of the seat foam and cover. If the heating element is damaged or inoperative the complete seat cushion/cover or seat back/cover assembly must be replaced. Refer to the appropriate procedures in BODY/SEATS. Procedures

- Heated Seat Module - One heated seat module is used per vehicle. The heated seat module is mounted under the driver front seat. This module contains the control logic and software for the front and 2nd row heated seat system. The module communicates on the Local Interconnect Network (LIN) data bus to the CCN.
- Rear Door Modules - A door module is concealed behind the trim panel of each sliding door. The rear door modules each utilize integrated circuitry and information carried on the CAN data bus network. In regards to the 2nd row heated seat system, the modules communicate between the hardwired heated seat switches and the instrument cluster. The cluster then transfers the information to the heated seat module.
- Cab Compartment Node (CCN) - The instrument cluster utilizes integrated software and information carried on the LIN and CAN data bus. The instrument cluster serves as the link between the heated seat switches and the heated seat module.

For complete circuit diagrams, see Wiring Information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.