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)
On-vehicle inspection
Driving Position Memory Switch Circuit (w/ Memory)Diagnosis system
1. DESCRIPTION
(a) When troubleshooting OBD II vehicles, the only
difference from the usual troubleshooting procedure
is to connect an OBD II scan tool complying with
SAE J1987 or a intelligent tester to the vehicle, and
read off various data output from the vehicle's ECM.
(b) OBD II reg ...
Short to B+ in Rear Curtain Shield Squib RH
Circuit
DTC B1633/82 Short to B+ in Rear Curtain Shield Squib RH
Circuit
DESCRIPTION
The rear curtain shield squib RH circuit consists of the center airbag sensor
assembly and the curtain
shield airbag assembly RH.
The circuit instructs the SRS to deploy when deployment conditions are met.
DTC B ...
Open in One Side of CAN Branch Line
DESCRIPTION
If 2 or more ECUs and/or sensors do not appear on the intelligent tester
"Communication Bus Check"
screen, one side of the CAN branch wire may be open. (One side of the CAN-H
[branch wire] / CAN-L
[branch wire] of the ECU and/or sensor is open.)
Symptom
...