Circuit/System Description

Battery voltage is supplied at all times to the memory seat module (MSM) from the 10A DPM fuse located in the left rear fuse block. This voltage is used by the MSM for logic power and to supply battery reference voltage to the seat and lumbar switches. Battery voltage is supplied at all times to the MSM from the SEATS 30A circuit breaker located in the left rear fuse block. This voltage is used by the MSM to drive the driver seat adjuster motors, recline motor and the lumbar motors.

Both lumbar motors are reversible. For example, when the lumbar switch is pressed to move the lumbar support forward, battery positive voltage is applied through the switch contacts and the lumbar forward switch signal circuit to the MSM. In response to this signal, the MSM applies battery voltage through the lumbar motor forward control circuit and ground through the lumbar motor rearward control circuit to the motor. The motor runs to drive the lumbar support forward toward the occupants back until the switch is released. Moving the lumbar support rearward works similarly to moving the lumbar support forward, except that battery positive voltage and ground are applied on the opposite circuits causing the motor to run in the opposite direction.