Last Modified: 11-29-2007 1.6 J
Service Category: Vehicle Interior Section: Seat
Model Year: 2008 Model: Sequoia Doc ID: RM000001YWZ005X
Title: SEAT: REAR POWER SEAT CONTROL SYSTEM: DESCRIPTION (2008 Sequoia)

Rear Power Seat Switch Circuit

DESCRIPTION

When the rear power seat switch is operated, a recline signal is sent to the fold seat control ECU. The ECU activates the power seat motor based on the signal from the rear power seat switch.

WIRING DIAGRAM



INSPECTION PROCEDURE

PROCEDURE

1.

CHECK FOLD SEAT CONTROL ECU (INPUT SIGNAL)


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

Standard Voltage:

LH side

Tester Connection

Condition

Specified Condition

O34-12 (RCLF) - Body ground

Always

11 to 14 V

Rear power seat switch LH forward

Below 1 V

O34-13 (RCLR) - Body ground

Always

11 to 14 V

Rear power seat switch LH backward

Below 1 V

RH side

Tester Connection

Condition

Specified Condition

P20-12 (RCLF) - Body ground

Always

11 to 14 V

Rear power seat switch RH forward

Below 1 V

P20-13 (RCLR) - Body ground

Always

11 to 14 V

Rear power seat switch RH backward

Below 1 V

OK

2.

INSPECT REAR POWER SEAT SWITCH


(a) Remove the rear power seat switch SEAT: POWER SEAT SWITCH (for Rear No. 2 Seat): REMOVAL (2008 Sequoia) .

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

4 (FWD) - 6 (E)

Always

10 kΩ or higher

Rear power seat switch forward

Below 1 Ω

5 (BACK) - 6 (E)

Always

10 kΩ or higher

Rear power seat switch backward

Below 1 Ω

OK

3.

CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - REAR POWER SEAT SWITCH)


(a) Disconnect the O34 or P20 ECU connector.

(b) Disconnect the O29 or P13 switch connector.

(c) Disconnect the connector from the folding motor.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

LH Side

Tester Connection

Condition

Specified Condition

O34-12 (RCLF) - O29-4 (FWD)

Always

Below 1 Ω

O34-12 (RCLF) - Body ground

Always

10 kΩ or higher

O34-13 (RCLR) - O29-5 (BACK)

Always

Below 1 Ω

O34-13 (RCLR) - Body ground

Always

10 kΩ or higher

RH Side

Tester Connection

Condition

Specified Condition

P20-12 (RCLF) - P13-4 (FWD)

Always

Below 1 Ω

P20-12 (RCLF) - Body ground

Always

10 kΩ or higher

P20-13 (RCLR) - P13-5 (BACK)

Always

Below 1 Ω

P20-13 (RCLR) - Body ground

Always

10 kΩ or higher

OK