Last Modified: 11-29-2007 1.6 J
Service Category: Vehicle Interior Section: Seat
Model Year: 2008 Model: Sequoia Doc ID: RM000003GL2000X
Title: SEAT: REAR POWER SEAT CONTROL SYSTEM: DESCRIPTION (2008 Sequoia)

Rear Door Courtesy Switch Circuit

DESCRIPTION

The fold seat control ECU receives signals from the rear door courtesy switch and detects the state of the rear door (open/close). If the ECU does not detect that the rear door is open, the seat folding and return functions are not available.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

READ VALUE USING TECHSTREAM (REAR DOOR COURTESY SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream ON.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) According to the display on the Techstream, read the Data List.

Main Body

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

RL Door Courtesy SW

Rear door courtesy light switch LH signal / ON or OFF

ON: Rear door courtesy light switch LH ON

OFF: Rear door courtesy light switch LH OFF

-

RR Door Courtesy SW

Rear door courtesy light switch RH signal / ON or OFF

ON: Rear door courtesy light switch RH ON

OFF: Rear door courtesy light switch RH OFF

-

OK:

When rear door courtesy light switch operation is performed, the results are the same as above.

OK

2.

CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH - FOLD SEAT CONTROL ECU)

(a) Disconnect the O7 or P7 switch connector.



(b) Disconnect the O34 or P20 ECU connector.

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

Standard Resistance:

LH Side

Tester Connection

Condition

Specified Condition

O7-1 - O34-4 (R CL)

Always

Below 1 Ω

O7-1 - Body ground

Always

10 kΩ or higher

Standard Resistance:

RH Side

Tester Connection

Condition

Specified Condition

P7-1 - P20-4 (R CL)

Always

Below 1 Ω

P7-1 - Body ground

Always

10 kΩ or higher
OK