Component Description

Seat Control Switch - Without Memory 

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 Control Switch - With Memory 

The driver seat control switch is hard-wired to the DSM, which controls seat operation. When a specific seat adjustment position is selected, an individual circuit is switched to voltage.

Seat Control Switch - With Multi-Contour Seats 

The driver seat control switch is hard-wired to the DSM, which controls seat operation. When a specific seat adjustment position is selected, an individual circuit is switched to voltage.

The driver and passenger seat control switches each contain a 5 position momentary contact switch which provides an analog signal (stepped resistance) to the SCMG or SCMH. The resistance range for each multi-contour button is as follows:

DSM 

The driver seat control switch and power memory seat motors are hard-wired to the DSM. The DSM controls the operation of the power memory seat. The DSM communicates on the MS-CAN. PMI is required when a new DSM is installed. The DSM hard stop/soft stops must be set/reset any time a new DSM, driver seat track or driver seat backrest is installed.

Memory Set Switch 

The memory set switch contains 3 momentary contact switches. It is hard-wired to the DDM and is used to recall 1 of 3 memory positions stored in the DSM.

Driver Seat Track 

There are 3 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. All other seat track motors (front height, rear height) are serviced as part of the seat track assembly. On vehicles equipped with memory seats, each seat track motor contains a Hall-effect sensor which provides seat track position information to the DSM for setting/obtaining desired preset seat memory positions. The seat track motors move the power seat forward/backward and up/down depending on the polarity of voltage supplied from the DSM.

Passenger Seat Track 

The passenger power seat is equipped with 3 front seat track bi-directional motors. The horizontal (fore/aft) front seat track motor is the only seat track motor which can be serviced separately from the seat track assembly. All other seat track motors (front height, rear height) are 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.

Driver Seat Backrest 

The 10-way driver seat backrest contains a bi-directional motor which is integral to the seat backrest frame assembly. If equipped with memory, the seat backrest motor contains a Hall-effect sensor which provides seat backrest position information to the DSM for setting/obtaining desired preset seat memory positions. The seat backrest motor moves the seat backrest forward/backward depending on the polarity of voltage supplied from the DSM (if equipped with memory) or from the seat control switch.

Passenger Seat Backrest 

The 10-way passenger seat backrest contains a bi-directional motor which is integral to the seat backrest frame assembly. The seat backrest motor moves the seat backrest forward/backward depending on the polarity of voltage supplied from the seat control switch.

FDIM 

The FDIM (touchscreen) contains the heated seat (or climate controlled seat) buttons.

FCIM 

The FCIM contains the heated seat (or climate controlled seat) buttons.

If equipped with heated seats, the FCIM 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 FCIM cycles the heater circuits on/off as required to maintain the setpoint temperature. PMI is required when a new FCIM is installed.

Heater Mat 

If equipped with heated seats, the cushion heater mats are each equipped with a temperature sensor (thermistor) which provides feedback to the FCIM. The heater mats are serviced by installing a new backrest/cushion foam. The cushion and backrest heater mats are connected in series.

SCME 

If equipped with climate controlled seats, the SCME controls the operation of the climate controlled seat system. PMI is required when a new SCME is installed.

SCMG 

The SCMG controls the operation of the driver multi-contour seat. PMI is required when a new SCMG is installed. The SCMG communicates on the MS-CAN. The SCMG controls the air pump (part of the front seat power lumbar assembly) which supplies air pressure necessary to be diverted to the applicable air bladders/bolsters as required for the desired mode(s) of operation.

SCMH 

The SCMH controls the operation of the passenger multi-contour seat. PMI is required when a new SCMH is installed. The SCMH communicates on the MS-CAN. The SCMH controls the air pump (part of the front seat power lumbar assembly) which supplies air pressure necessary to be diverted to the applicable air bladders/bolsters as required for the desired mode(s) of operation.

Blower Motor 

If equipped with climate controlled seats, the seat cushion and backrest are each equipped with a blower motor assembly (Thermo-Electric Device (TED), fan motor, serviced as an assembly). There is also a temperature sensor (thermistor) in each blower motor which provides feedback to the SCME. The blower motor assembly is controlled by the SCME.

Front Seat Power Lumbar Assembly 

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

Front Seat Power Lumbar Assembly - Multi-Contour Seats 

The front seat power lumbar assembly includes an air pump, air hoses and bladders (serviced as an assembly).

Front Seat Cushion Adjuster - Multi-Contour Seats 

The front seat cushion adjuster includes air hoses and bladders (serviced as an assembly).