Power Seats - Description
DESCRIPTION
POWER SEAT SYSTEM
The power seat system allows the driver and front seat passenger to electrically adjust their seating positions using the power seat switches located on the outboard seat cushion side shield of each front seat.
A driver side ten-way power seat includes a six-way adjustable seat cushion track, a two-way power seat back and two-way power lumbar. The driver power seat can be adjusted up, down, front up, front down, forward, rearward, recliner forward, and recliner rearward. A passenger side four-way power seat includes a two-way adjustable seat cushion track and a two-way power seat back. The passenger power front seat can be adjusted forward, rearward, recliner forward and recliner rearward. The power seat system is also available with the heated seat option and memory seat option that automatically positions the power seat for two different drivers Heated Seats - Description and Memory Seat System.
The driver power seat adjuster fore/aft contains a reversible motor (2) that are connected to worm-drive gearbox that move the seat adjuster through a combination of screw-type drive units. On vehicles equipped with non-memory power seats, each motor contains a self-resetting circuit breaker to protect it from overload. On vehicles equipped with memory power seats the motor overload protection is a function of the Memory Seat Module (MSM). Consecutive or frequent resetting of the circuit breakers may damaged the motors. There are no motors on the passenger upper power seat adjuster.
The power seat system for this vehicle includes the following major components:
The Front Tilt Motor (1). Located on the left front of the seat bottom.
The Rear Tilt Motor (3). Located on the right front of the seat bottom.
The Power Seat Adjuster Motor (2) (driver and passenger seat). Located on the left rear of the seat bottom. The reversible motor is connected to a worm-drive gearbox that moves the seat adjuster through a screw-type drive unit. On vehicles equipped with non-memory power seats, the motor will contain a self-resetting circuit breaker to protect it from overload. On vehicles equipped with memory power seats, the motor overload protection is a function of the Memory Seat Module (MSM). Consecutive or frequent resetting of the circuit breakers may damaged the motors. The motor is part of the lower power seat track unit and must be replaced as an assembly.
NOTE: The power seat recliner motor cannot be repaired. If the unit is inoperative or damaged, the seat back frame must be replaced, Power Seat Recliner Motor - Removal .
Power Lumbar Motor (1). Located on the inboard side of the seat back with a black wire cable.
Power Seat Recliner Motor (2). Located on the inboard side of the seat back. The power seat recliner replaces the manual seat recliner. The power seat option includes an electrically operated power seat back recliner mechanism. The power seat recliner switch is integral to the power seat switch assembly, but is actuated with a separate switch knob.
NOTE: Left front power seat switch shown. Right front power seat switch doesn't include lumbar and memory.
Power Seat Switch (1). Located on the outboard side of the seat cushion. Vehicles may be equipped with driver only, or driver and passenger power seat switches. One seat switch is used for each front seat. The power seat switches are paddle-type levers. Movement of the seat cushions and backs mimics the action of the switch paddles. The driver power seat switch type (memory or non-memory) can be identified by the color of the switch electrical connector receptacle. Memory switches have a light gray connector receptacle and non-memory have a black receptacle. for additional information.
Power Lumbar Switch (3). When equipped, this switch is located at the bottom rear of the seat switch panel.
Memory Seat Switch (2) (driver seat only). When equipped, this switch is located at the upper rear of the seat switch panel. Refer to Memory Seat System.
MEMORY SEAT SYSTEM
An electronic memory seat system is available on certain models. The memory system is able to store and recall all driver side power seat positions, and the drivers side view mirror positions. The system can be set for two different drivers. On vehicles with a factory installed radio connected to the Controller Area Network (CAN) data bus network, the memory system is also able to store and recall up to twenty radio station presets (ten AM and ten FM), also for two drivers. The memory system also will store and recall the last station listened to for each driver, even if it is not one of the twenty preset stations.
The memory system will automatically recall all of these settings when a button of the memory switch is depressed, or when the doors are unlocked using the FOBIK transmitter (if enabled). If the vehicle has more than two drivers the FOBIK transmitter recall of memory features can be disabled. This is a customer programmable feature of the EVIC.
The memory system also has a easy exit feature that will move the driver seat rearward 55 millimeters or to the end of its travel, whichever occurs first, when the key is removed from the ignition switch lock cylinder. This is a customer programmable feature of the overhead console.
The memory system includes the following components:
- Memory Selector Switch - located in the driver seat trim panel.
- Driver Door Module (DMM) - located in the driver door, behind the trim panel.
- Passenger Door Module (PDM) - located in the passenger door, behind the trim panel.
- Hall Effect Sensors - Drivers Mirror - The hall effect sensor is permanently installed on the drivers side view mirror motor. This hall effect sensor is used to provide a reference signal to the memory heated seat mirror module, letting the module know the exact position of the mirror.
- Wireless Integration Node (WIN) - located at ignition key cylinder.
- FOBIK Transmitter - located with ignition key.
- Memory Seat Module (MSM) - located underneath the driver seat, also controls the Adjustable Pedals and Mirrors.
- Hall Effect Sensors - Seat Track - These hall effect sensors are permanently installed in each of the power seat track motors. They are used to provide a reference signal to the memory heated seat mirror module, letting the module know the exact position of the seat cushion and recliner.
- Radio - located in the instrument panel center stack.
- Automatic Temperature Control (ATC) - located in the instrument panel center stack.
Certain functions and features of the memory system rely upon resources shared with other electronic modules in the vehicle over the Controller Area Network (CAN) bus. The CAN bus allows the sharing of sensor information. This helps to reduce wire harness complexity, internal controller hardware, and component sensor current loads. At the same time, this system provides increased reliability, enhanced diagnostics, and allows the addition of many new feature capabilities. For diagnosis of these electronic modules or of the CAN bus, the use of a scan tool and the proper diagnostic information are needed.