Seat Track: Description and Operation

DRIVER POWER SEAT TRACK
The eight-way power seat option includes a electrically operated power seat track located under each front seat. The left side power seat track also provides the mounting location for the body control module on this vehicle. The power seat circuit breakers are mounted on the rear of each power seat track, just behind the seat rear trim panel. The lower half of the power seat track is secured to the floor panel via four studs and nuts that must be accessed from the underside of the vehicle. Four bolts secure the bottom of the seat cushion pan to the upper half of the power seat track unit. Four additional bolts secure the seat back frame to the power seat track unit.

The power seat track unit includes four 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. Each of the four power seat track motors used on models equipped with the optional memory system incorporates a position potentiometer integral to the motor assembly which electronically monitors the motor position. This enables the memory system to function by referencing the motor positions programmed into the memory seat/mirror module.

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. A third motor is the horizontal adjustment motor, which moves the seat track in the forward and rearward directions. The forth motor is the recliner adjustment motor, which moves the seat back in the forward and rearward directions.

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.

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.

See the owner's manual in the vehicle glove box for more information on the power seat switch functions and the seat adjusting procedures.

PASSENGER POWER SEAT TRACK
The eight-way power seat option includes a electrically operated power seat track unit located under each front seat. The power seat circuit breaker is mounted on the rear of the power seat track, just behind the seat rear trim panel. The lower half of the power seat track is secured to the floor panel via four studs and nuts that must be accessed from the underside of the vehicle. Four bolts secure the bottom of the seat cushion frame to the upper half of the power seat track unit. Four additional bolts secure the seat back frame to the power seat track unit.

The power seat track unit includes four 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. A third motor is the horizontal adjustment motor, which moves the seat track in the forward and rearward directions. The forth motor is the recliner adjustment motor, which moves the seat back in the forward and rearward directions.

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.

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.

See the owner's manual in the vehicle glove box for more information on the power seat switch functions and the seat adjusting procedures.