Last Modified: 11-29-2007 1.6 U
Service Category: Vehicle Interior Section: Seat
Model Year: 2008 Model: Sequoia Doc ID: RM0000030Y7002X
Title: SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): TERMINALS OF ECU (2008 Sequoia)

TERMINALS OF ECU

1. CHECK FRONT POWER SEAT SWITCH LH



(a) Disconnect the X10 and X11 switch connectors.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

X10-1 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

X10-5 (+B) - X10-1 (GND)

L - W-B

Battery (ECU power source)

Always

11 to 14 V

X11-4 (IG) - X10-1 (GND)

BR - W-B

Ignition switch signal

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

X11-8 (SYSB) - X10-1 (GND)

R - W-B

Battery (ECU power source)

Always

11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the X10 and X11 switch connectors.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

X10-2 (SLD+) - X10-1 (GND)

P - W-B

Sliding motor signal (forward)

Seat moving forward using sliding switch

11 to 14 V

Other

Below 1 V

X10-3 (SLD-) - X10-1 (GND)

R - W-B

Sliding motor signal (rearward)

Seat moving rearward using sliding switch

11 to 14 V

Other

Below 1 V

X10-4 (FRV-) - X10-1 (GND)

W - W-B

Front vertical motor signal (downward)

Seat cushion front portion lowering using front vertical switch

11 to 14 V

Other

Below 1 V

X10-6 (FRV+) - X10-1 (GND)

LG - W-B

Front vertical motor signal (upward)

Seat cushion front portion rising using front vertical switch

11 to 14 V

Other

Below 1 V

X10-7 (LFT+) - X10-1 (GND)

G - W-B

Lifter motor signal (upward)

Seat cushion rising using lifter switch

11 to 14 V

Other

Below 1 V

X10-8 (RCL+) - X10-1 (GND)

O - W-B

Reclining motor signal (forward)

Seatback moving forward using reclining switch

11 to 14 V

Other

Below 1 V

X10-9 (LFT-) - X10-1 (GND)

Y - W-B

Lifter motor signal (downward)

Seat cushion lowering using lifter switch

11 to 14 V

Other

Below 1 V

X10-10 (RCL-) - X10-1 (GND)

B - W-B

Reclining motor signal (rearward)

Seatback moving rearward using reclining switch

11 to 14 V

Other

Below 1 V

If the result is not as specified, the ECU may have a malfunction.

2. CHECK OUTER MIRROR CONTROL ECU



(a) Disconnect the M7 and M8 ECU connectors.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

M7-3 (B) - M7-9 (GND)

R - W-B

Battery (ECU power source)

Always

11 to 14 V

M7-4 (ACC) - M7-9 (GND)

Y - W-B

Ignition power supply

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

M7-9 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

M8-10 (MSWE) - M7-9 (GND)

V - W-B

Ground for seat memory switch

Always

Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the M7 and M8 ECU connectors.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

M8-7 (M2) - M8-10 (MSWE)

O - V

Memory 2 switch signal

Memory 2 switch OFF

11 to 14 V

Memory 2 switch ON

Below 1 V

M8-8 (M1) - M8-10 (MSWE)

P - V

Memory 1 switch signal

Memory 1 switch OFF

11 to 14 V

Memory 1 switch ON

Below 1 V

M8-9 (MM) - M8-10 (MSWE)

L - V

Memory SET switch signal

Memory SET switch OFF

11 to 14 V

Memory SET switch ON

Below 1 V

If the result is not as specified, the ECU may have a malfunction.