Toyota Sequoia (2005). Manual - part 518

I28431

Back Door ECU

ILE

B11

8

2

1

R–L

S8
Step Light

LGLP

B11

7

BF1

8

BD2

9

W

W

W

W

W

R

R

R

R

R

R

R

B

B

A

A

1G

6

1G

13

1G

14

1E

8

1J

5

2C

3

2D

1

SHORT PIN DOME

4

5

F10
FL Block

Battery

3C

3A

J21
J/C

BD2

1

1

2

R–L

BF1

3

L2
Luggage Room Light

Instrument Panel J/B

Engine Room J/B

Instrument Panel J/B

DOOR

ON

OFF

J29
J/C

M

F

J29

J30

6

16

Sub J/B No.

 

3

2

IN1

–

DIAGNOSTICS

BACK DOOR CONTROL SYSTEM

DI–1867

2061

Luggage Room Light Circuit

CIRCUIT DESCRIPTION

When the luggage room light and the rear room light are turned to the DOOR position, and any door is
opened, voltage is applied to the LGLP terminal of the back door ECU, and voltage is output from the ILE
terminal.

WIRING DIAGRAM

DI57L–11

DI–1868

–

DIAGNOSTICS

BACK DOOR CONTROL SYSTEM

2062

INSPECTION PROCEDURE

1

Check luggage room light (See page 

BE–40

).

NG

Replace the luggage room light.

OK

2

Check wire harness and connector between luggage room light and back door
ECU (See page 

IN–35

).

NG

Repair or replace wire harness or connector.

OK

3

Check wire harness and connector between luggage room light and battery 
(See page 

IN–35

).

NG

Repair or replace wire harness or connector.

OK

Proceed to next circuit inspection shown in
problem symptoms table
(See page 

DI–1854

).

I18724

Back Door ECU

LSWB

B10

6

2

1

R–Y

B13
Back Door Unlock
Detection Switch

R–L

B10

22

LSWE

–

DIAGNOSTICS

BACK DOOR CONTROL SYSTEM

DI–1869

2063

Back door unlock detection switch circuit

CIRCUIT DESCRIPTION

The door unlock detection switch is built in the door lock motor. This switch is ON when the door lock is in
the unlock position and OFF when the door lock is in the lock position. The ECU detects the door lock condi-
tions in this circuit. It is used as one of the operating conditions for the theft deterrent system.

WIRING DIAGRAM

DI57L–12

DI–1870

–

DIAGNOSTICS

BACK DOOR CONTROL SYSTEM

2064

INSPECTION PROCEDURE

HINT:
When using the hand–held tester, start the inspection from step 1 and when not using the hand–held tester,
start from step 2.

1

Check the back door unlock detection switch using hand–held tester.

PREPARATION:
(a)

Connect the hand–held tester to the DLC3.

(b)

Turn the ignition switch ON.

CHECK:
According to the display on the tester, read the DATA LIST.
BACK–DOOR:

Item

Measurement Item/

Display (Range)

Normal Condition

Diagnostic Note

LOCK POS SW

Back door lock posi-

tion SW signal/ON or

OFF

ON: Back door lock is in unlock position

OFF: Back door lock is in lock position

–

OK:

Indication on the tester switches between ON and OFF in accordance with the back door unlock
detection switch status.

OK

Proceed to next circuit inspection shown in
problem symptoms table (See page 

DI–1854

).

NG

2

Check back door unlock detection switch (See page 

BE–79

).

NG

Replace the back door unlock detection switch.

OK