Heated Seats
This system allows independent seat electrical heating of each front seat on demand.
The components of the system are:
- the seat heater mats located on the seat cushion and backrest.
- the heated seat module located on the passenger power seat track and cushion frame on manual seat track.
- the heated seat switches, located on the electronic automatic temperature control (EATC) module.
- temperature sensors, located in the seat cushion heater mats.
A new heater mat will come assembled on a new foam pad.
Climate Controlled Seats
The climate control seat system is able to heat and cool the front seats. Each climate controlled seat is operated by push-buttons on the electronic automatic temperature control (EATC) module located on the instrument panel. Each front seat temperature is then monitored and controlled by the climate control seat module (CCSM) located on the front passenger seat track.
The climate controlled seat system contains the following components:
- EATC module
- CCSM
- Thermo-electric device (TED) and blower assembly within each front seat cushion and backrest
- Air filter (attached to each TED and blower assembly)
- Cushion TED adapter attached to the cushion frame
- Cushion and backrest manifolds
- Cushion and backrest foam pads
- Cushion and backrest trim covers
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Seats
Front Seats
NOTE: The high speed controller area network (HS-CAN) circuits that pass through the passenger seat harness are part of the main HS-CAN LOOP. If the front passenger seat-to-floor connectors are disconnected, a NO START condition will result.
NOTE: The medium speed controller area network (MS-CAN) circuits that pass through the driver seat harness are part of the main MS-CAN LOOP. If the front driver seat-to-floor connectors are disconnected, various MS-CAN modules will not be able to communicate.
The front seats can be equipped with the following systems:
- Two-way manual seat track (passenger only)
- Four-way manual seat track (driver only)
- Six-way power seat track
- Manual recline
- Power recline
- Backrest, without fold flat
- Backrest with fold flat (optional, passenger only)
- Heated seats
- Heated/cooled climate controlled seats
- Memory driver seat
- Manual lumbar (driver only)
- Power lumbar
- Adjustable head restraints
- Seat side air bags (standard)
- Occupant classification sensor (OCS) system on passenger seat
Driver Seat Module - Memory Seat
The power driver seat, power outside rear view mirrors and power adjustable pedals are controlled by the driver seat module (DSM) only when the vehicle is equipped with the programmable/recall memory option. The DSM is located on the driver seat track.
This system allows automatic positioning of the driver seat to 2 programmable positions.
- A power driver seat position can be stored at any time. The driver must move the seat to the desired position using the driver seat switch assembly. The driver must then depress the memory SET switch which activates the memory SET switch light emitting diode (LED). Within 5 seconds (before the LED goes out), the driver must select a memory position. Memory 1 is selected by depressing memory switch 1. Memory 2 is selected by depressing memory switch 2.
- If no memory switch input is received within the 5-second time limit, the operation is aborted and the memory seat position switch (set switch) LED is turned OFF. This also occurs if one of the following inputs is received during the 5-second programming limit:
- Driver seat control switch
- Memory seat position switch (set switch)
- Power adjustable pedal switch
A programmed seat position can only be recalled when the transmission selector is in PARK or NEUTRAL with the ignition switch in the RUN position. A position may be programmed at any time.
- Principles of Operation
Driver and Passenger Power Seats Without Memory
The driver and front passenger power seat motors are hardwired to the seat control switches on each respective seat. The circuits are normally at ground through the seat control switch. Each individual seat track, recliner (if equipped) and lumbar (if equipped) motor circuit is switched to power when the specific adjustment position is selected.
Power Driver Seat With Memory
The driver power seat is controlled by the driver seat module (DSM), if equipped. The memory driver seat feature allows the driver to program a personalized seat position that can be recalled using the memory switch or a remote keyless entry (RKE) transmitter. There are 2 memory settings possible. The outside rear view mirror positions are also stored and recalled with the power driver seat positions.
The DSM is located underneath the driver seat cushion frame. The DSM does not require calibration to the driver seat track.
The driver seat control switch provides voltage to the DSM when activated. The NEUTRAL position of each driver seat control switch position is a ground state through the seat control switch contacts. A voltage input causes the DSM to power the appropriate motor until the input is removed. Ground is the normal state of the motor circuits through the DSM and is not switched to control the motors. The DSM internally switches the appropriate circuit from ground to power for operating the motors.
As the seat is adjusted, the DSM constantly monitors the motor position sensors to record the current seat position. The DSM will remove power from the motor upon termination of the seat control switch input or if the DSM does not see movement from the motor by monitoring the position sensor.
The DSM communicates diagnostic trouble code (DTC) and other information using the MS-CAN communication bus. It should be noted for diagnostics that because CAN bus communication is more robust and reliable than other methods, it may be possible to have limited module communication with one of the CAN bus circuits disconnected or shorted to ground. Refer to Section 418-00 for information concerning MS-CAN bus communication.
Do you have memory or not ?
Taking the vehicle to a qualified repair shop an having a diagnostic scan of the seat module's done could save time an money , by not replacing parts needlessly .
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