Driver Side Power Seat Motor Circuit
SEAT: FRONT POWER SEAT CONTROL 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) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Driver Seat / Active Test.
(e) Perform the Active Test by following the directions on the Techstream screen.
Driver Seat:
OK:
Each power seat motor operates.
NG -- INSPECT FRONT SEAT ASSEMBLY LH (POWER SEAT MOTOR)
OK -- REPLACE FRONT POWER SEAT SWITCH LH (POSITION CONTROL ECU) Removal
2. INSPECT FRONT SEAT ASSEMBLY LH (POWER SEAT MOTOR)
(a) Inspect the power seat motor Operation Check.
Result:
B -- REPLACE FRONT SEAT ASSEMBLY LH (POWER SEAT MOTOR) Removal
A -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (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 -- REPLACE FRONT POWER SEAT SWITCH LH (POSITION CONTROL ECU) Removal