Power Seat System

POWER SEATS
The power seat system on this model allows the driver to electrically adjust their seating positions in eight directions for optimum control and comfort, using the power seat switch located on the outboard seat cushion side shield. The power seat system receives battery current through a 40 amp fuse in the Power Distribution Center (PDC) and a 20 amp circuit breaker in the junction block so that the power seats remain operational, regardless of the ignition switch position.

WARNING: SOME VEHICLES ARE EQUIPPED WITH SIDE AIRBAGS. BEFORE ATTEMPTING TO DIAGNOSE OR SERVICE ANY SEAT OR POWER SEAT SYSTEM COMPONENT YOU MUST FIRST DISCONNECT AND ISOLATE THE BATTERY NEGATIVE CABLE. THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACITOR TO DISCHARGE BEFORE FURTHER SYSTEM SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO DO SO COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

A eight-way power seat is standard on premium models and optional on others. This option includes a six-way adjustable seat cushion track and a two-way power seat back.

The eight-way power seat is also available with the heated seat system (Export Only). Refer to Heated Seat System for more information on the heated seat option.

The power seat system includes the following components:
- Power seat switch
- Power seat system fuse and circuit breaker
- Power seat track and motor assembly.

Refer to Wiring Diagrams for complete circuit diagrams. Following are general descriptions and operations for the major components in the power seat system.

When a power seat switch control knob or knobs are actuated, a battery feed and a ground path are applied through the switch contacts to the power seat track or recliner adjuster motor. The selected adjuster motor operates to move the seat track or recliner through its drive unit in the selected direction until the switch is released, or until the travel limit of the adjuster is reached. When the switch is moved in the opposite direction, the battery feed and ground path to the motor are reversed through the switch contacts. This causes the adjuster motor to run in the opposite direction.

See the owner's manual in the vehicle glove box for more information on the features, use and operation of the power seat system.

SEAT SWITCH
Vehicles equipped with power seats utilize a eight-way power seat switch. This eight-way power seat switch features two knobs ganged together on the outboard seat cushion side shield.

The switch is secured to the back of the seat cushion side shield with two screws. However, the control knobs for the eight-way power seat switch unit must be removed before the seat switch can be removed from the side shield.

The power seat switch cannot be repaired. If one switch is damaged or faulty, the entire power seat switch unit must be replaced.

The power seat tracks can be adjusted in eight different ways using the power seat switches. See the owners manual in the vehicle glove box for more information on the power seat switch functions and the seat adjusting procedures.

When a power seat switch control knob or knobs are actuated, a battery feed and a ground path are applied through the switch contacts to the power seat track or recliner adjuster motor. The selected adjuster motor operates to move the seat track or recliner through its drive unit in the selected direction until the switch is released, or until the travel limit of the adjuster is reached. When the switch is moved in the opposite direction, the battery feed and ground path to the motor are reversed through the switch contacts. This causes the adjuster motor to run in the opposite direction.

No power seat switch should be held applied in any direction after the adjuster has reached its travel limit. The power seat adjuster motors each contain a self-resetting circuit breaker to protect them from overload. However, consecutive or frequent resetting of the circuit breaker must not be allowed to continue, or the motor may be damaged.

RECLINER MOTOR
The eight-way power seat option includes an electrically operated seat back recliner mechanism. The only visible evidence of this option is the separate power seat recliner switch control knob that is located on the outboard seat cushion side shield, just behind the other power seat switch control knob.

Power Seat Recliner And Track:

The power seat recliner unit is mounted in the place of a seat hinge on the outboard side of the seat. The upper hinge plate of the power seat recliner mechanism is secured with screws to the seat back frame and is concealed beneath the seat back trim cover and padding. The lower hinge plate and the motor and drive unit of the power seat recliner mechanism is secured with screws to the seat cushion frame, and is concealed by the outboard seat cushion side shield.

The power seat recliner cannot be repaired. If the unit is faulty or damaged, it must be replaced. Refer to Bucket Seat Recliner in the Body for the service procedure.

The power seat recliner includes a reversible electric motor that is secured to the lower hinge plate of the recliner unit. The motor is connected to a gearbox that moves the upper hinge plate of the power seat recliner through a screw-type drive unit. The driver side power seat recliner motor also has a position potentiometer integral to the motor assembly, which electronically monitors the motor position.

SEAT TRACK
The eight-way power seat options include a single electrically operated power seat track unit located under the drivers seat. The power seat track unit replaces the standard equipment manual seat track. The lower half of the power seat track is secured at the front with two bolts to the floor panel seat cross member, and at the rear with two bolts to the floor panel. Four fasteners secure the bottom of the seat cushion frame to four studs on the upper half of the power seat track unit.

The power seat track unit cannot be repaired, and is serviced only as a complete unit. If any component in this unit is faulty or damaged, the entire power seat track unit must be replaced. Refer to Bucket Seat Track Adjuster in the Body for the procedure.

The power seat track unit includes three reversible electric motors that are secured to the upper half of the track unit. Each motor moves the seat adjuster through a combination of worm-drive gearboxes and screw-type drive units.

The front and rear of the seat are operated by two separate vertical adjustment motors. These motors can be operated independently of each other, tilting the entire seat assembly forward or rearward; or, they can be operated in unison by selecting the proper power seat switch functions, which will raise or lower the entire seat assembly. The third motor is the horizontal adjustment motor, which moves the seat track in the forward and rearward directions.