Driver Side Power Seat Motor Circuit

SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Seat Position Memory System): Driver Side Power Seat Motor Circuit

Driver Side Power Seat Motor Circuit

DESCRIPTION

When the power seat control switch is operated, a command signal is sent to the front power seat switch LH (position control ECU). The front power seat switch LH (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 front power seat switch LH (position control ECU) is designed so that any malfunction of the seat memory system will not interfere with manual seat control.
If the front power seat switch LH (position control ECU) detects a low motor speed, abnormal activity, or sudden motor current fluctuation, the system will stop the motor. If the motor operates continuously for 120 seconds or more, the system will stop the motor until the switch is turned on again.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (FRONT POWER SEAT SWITCH LH (POSITION CONTROL ECU))
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Perform the Active Test by following the directions on the tester screen.

Driver Seat





OK:
Each power seat motor operates.
NG -- INSPECT FRONT SEAT ADJUSTER SUB-ASSEMBLY (POWER SEAT MOTOR)
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
2. INSPECT FRONT SEAT ADJUSTER SUB-ASSEMBLY (POWER SEAT MOTOR)
(a) Inspect the power seat motor Front Seat Frame With Adjuster.
OK:
The power seat motor operates.
NG -- REPLACE FRONT SEAT ADJUSTER SUB-ASSEMBLY (POWER SEAT MOTOR)
OK -- Continue to next step.
3. CHECK WIRE HARNESS (FRONT POWER SEAT SWITCH LH - POWER SEAT MOTOR)




(a) Disconnect the front power seat switch LH (position control ECU) connector and power seat motor connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE