Power Seat Motor Circuit

POWER SEAT MOTOR CIRCUIT

CIRCUIT DESCRIPTION

When the power seat control switch is operated, a command signal is sent to the position control ECU. The position control ECU then controls the appropriate seat motor as needed. This memory system does not use a seat position sensor. The seat position is detected by counting pulses that are output when the motor turns. If there is no pulse output from the motor, the motor will stop operating. The ECU is designed so that a malfunction of the seat memory system will not interfere with manual seat control.

HINT: The front power seat control system is part of the large-scale body multiplex system. This system features shared communication wiring that reduces the wiring complexity of the communication lines. The first step in any repair is to confirm the proper operation of the communication system. Proceed with troubleshooting after the communication has been verified (See Multiplex Communication System).

Wiring Diagram:

Step 1:

Step 1 (Continued) - 2:

Step 3:

INSPECTION PROCEDURE