DESCRIPTION
When the power seat control switch is operated, a command signal is sent to the position control ECU and switch assembly (power seat control switch and ECU). The front power seat switch 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 position control ECU and switch assembly (power seat control switch and ECU) is designed so that any malfunction of the seat memory system will not interfere with manual seat control.
If the position control ECU and switch assembly (power seat control switch and 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
1 CHECK FRONT POWER SEAT OPERATION
Result
2 READ VALUE OF INTELLIGENT TESTER (FRONT POWER SEAT SWITCH)
Position control ECU & switch assembly LH, RH
OK: On tester screen, each item changes between ON and OFF according to above chart.
3 PERFORM ACTIVE TEST BY ACTIVE TEST USING INTELLIGENT TESTER (POWER SEAT MOTOR)
Position control ECU & switch assembly (driver, passenger side)
OK: The power seat motors operate normally.
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
4 INSPECT FRONT SEAT ADJUSTER SUB-ASSEMBLY (POWER SEAT MOTOR)
OK: The power seat motor operates.
5 CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - POWER SEAT MOTOR)
Standard resistance
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
6 CHECK WIRE HARNESS (POWER SEAT CONTROL SWITCH - BATTERY AND BODY GROUND)
Standard voltage (Driver side)
Standard resistance (Driver side)
7 INSPECT POWER SEAT CONTROL SWITCH (LUMBER SUPPORT CONTROL)
8 INSPECT FRONT SEAT ADJUSTER SUB-ASSEMBLY (POWER SEAT MOTOR)
OK: The power seat motor operates
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SEAT CONTROL SWITCH - POWER SEAT MOTOR)
Disassembly
HINT:
Overhaul the RH side by the same procedures as these of
the LH side.
1. REMOVE REAR WHEEL
2. SEPARATE REAR DISC BRAKE CALIPER
ASSEMBLY LH
HINT:
Do not disconnect the flexible hose from the brake
caliper.
3. REMOVE REAR DISC
(a) Release the parking brake, and remove the rear
disc.
H ...
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Installation
HINT:
Install the RH side by the same procedure as the LH side.
1. INSTALL FRONT DISC BRAKE CYLINDER SLIDE BUSH
(a) Apply the lithium soap base glycol grease to a new
front disc brake cylinder slide bush.
(b) Install the cylinder slide bush to the bottom side of
the front disc brake cyli ...