Driver 6-Way Power Seat

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

Seat adjuster Switch and Motors

Ground is supplied at all times to the driver seat adjuster switch through the switch ground circuit and ground connection. The non-memory seat memory control module supplies a low current voltage to each signal circuit of the seat adjuster switch. When the driver seat adjuster switches are pressed, the appropriate signal circuit from the seat memory control module is pulled low through the switch contacts indicating the power seat command. The seat memory control module then commands the appropriate driver seat motor to move in response to the switch signal.

All of the seat motors operate independently of each other. Each motor contains an electronic circuit breaker (PTC) that opens in the event of a circuit overload and will reset only after voltage has been removed from the circuit. These are the horizontal motor, vertical motor, and the seat back recline motor. The seat horizontal motor moves the entire seat forward and rearward, the seat vertical motor moves the entire seat up and down, and the recline motor moves the angle of the seat back forward or rearward.

Seat Memory Control Module Power and Ground

The seat memory control module is a non-memory memory control module. The main purpose for this module is control the driver and passenger seat easy entry functions. Battery positive voltage is supplied at all times to the seat memory control module through a 30 A fuse located in the underhood fuse block. This voltage is used by the module to apply power to the driver seat motors and the passenger seat horizontal motor when commanded ON. Battery positive voltage is also applied at all times to the seat memory control module through a 10 A fuse located in the rear body fuse block. This voltage is used to power up the module and to provide a low current voltage to the seat adjuster switch signal circuits. Ground is provided to the seat memory control module through the module ground circuit and ground connection.

Seat Motors

Seat Vertical and Recline Motor Operation

These seat motors are reversible. For example, when the seat front vertical up switch is pressed to tilt the front of the seat up, battery voltage is applied through the switch contacts and the seat front vertical motor up control circuit to the motor. With the front vertical motor down switch contacts closed to the switch ground circuit, the motor runs in order to drive the front of the seat up until the switch is released. Moving the front of the seat down works similarly to moving the front of the seat up, except that battery voltage and ground are applied on opposite circuits causing the motor to run in the opposite direction. All seat motors, except the seat horizontal motor, are powered this way. Refer to the Seat Horizontal Motor Operation below.

Seat Horizontal Motor Operation

When the passenger seat horizontal switch is pressed to move the entire seat forward, battery voltage is applied through the switch signal circuit to the driver seat memory control module indicating the entire seat forward command. In response to this signal, the control module applies battery voltage through the passenger seat horizontal motor forward control circuit and ground through the passenger seat horizontal motor rearward control circuit to the motor. The motor runs to drive the entire seat forward until the switch is released. Moving the entire seat rearward works similarly to moving the entire seat forward, except that battery positive voltage and ground are applied on the opposite circuits causing the motor to run in the opposite direction.