Toyota 4Runner: Front Power Seat does not Operate with Front Power Seat Switch

Toyota 4Runner Service Manual / Vehicle Interior / Seat / Front Power Seat Control System(w/ Memory) / Front Power Seat does not Operate with Front Power Seat Switch

DESCRIPTION

When a signal is input into the front power seat switch LH (position control ECU), the ECU manages the signals received from the front power seat switch LH and operates each motor. When 2 or more signals are input, the motors only operate when the signals are from the slide switch and reclining switch.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - BATTERY AND BODY GROUND)

(a) Disconnect the b18 and b19 front power seat switch LH connectors.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
b18-7 (+B1) - Body ground	Always	11 to 14 V
b19-12 (SYSB) - Body ground	Always	11 to 14 V

Standard Resistance:

Tester Connection	Condition	Specified Condition
b18-2 (GND1) - Body ground	Always	Below 1 Ω

Text in Illustration

*a	Front view of wire harness connector (to Front Power Seat Switch LH)

REPLACE FRONT POWER SEAT SWITCH LH

REPAIR OR REPLACE HARNESS OR CONNECTOR

Slide Sensor Malfunction (B2650)

DESCRIPTION When the front power seat switch LH does not receive a sensor signal despite forward or backward movement of the seat by power seat motor operation, this DTC is stored. DT ...

Power Seat Position is not Memorized

DESCRIPTION When the seat memory SET switch and a memory switch (M1 or M2) are pressed simultaneously, the main body ECU commands the position control ECU through CAN communication to record the ...

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