Toyota Sequoia (2005). Manual - part 488

I28519

W–B

BA1

P8
Power Window 
Motor Rear LH

P3
Power Window Control 
Switch Rear LH

G–R

B7

B7

RLU

RLD

BA1

B5

B5

BC1

BC1

G–R

G–R

G–Y

G–Y

G–Y

RRU

RRD

L

W–B

UP

BH

DWN

L

L

BK

W–B

D

U

E

25

13

BA1

BC1

13

W–B

D

U

E

UP

DWN

P4
Power Window Control 
Switch Rear RH

P9
Power Window 
Motor Rear RH

L

L

L

26

1

4

1

19

20

4

6

1

2

G

2

1

5

R

2

G

2

1

3

1

6

3

Body ECU

J/C

B

J

C

I

J30

J29

J/C

D

J45

J44

K

E

L

J45

J44

J30

J29

5

R

B

B

4

4

From PWR No. 4 Fuse

From PWR No. 3 Fuse

–

DIAGNOSTICS

BODY CONTROL SYSTEM

DI–1747

1941

Rear power window switch circuit

CIRCUIT DESCRIPTION

The rear power window switch controls the UP/DOWN function of the rear power window motor.
The driver door ECU (power window master switch) operates the remote control of each window UP/DOWN
function via BEAN.

WIRING DIAGRAM

DI6LS–11

DI–1748

–

DIAGNOSTICS

BODY CONTROL SYSTEM

1942

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 rear power window motor 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, perform the ”ACTIVE TEST”.
BODY ECU:

Item

Test Details

Diagnostic Note

RL P/W UP/DOWN

Rear left passenger power window DOWN/UP

Caution: This test causes vehicle parts to move.

Watch your hands and feet.

RR P/W UP/DOWN

Rear right passenger power window DOWN/UP

Caution: This test causes vehicle parts to move.

Watch your hands and feet.

OK:

The rear power windows go up or down correctly when operating them through the hand–held
tester.

OK

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

DI–1686

).

NG

2

Check power window control switch rear (See page 

BE–69

).

NG

Replace power window switch rear.

OK

3

Check wire harness and connector between power window control switch rear
and body ECU (See page 

IN–35

).

NG

Repair or replace wire harness or connector.

OK

–

DIAGNOSTICS

BODY CONTROL SYSTEM

DI–1749

1943

4

Check power window motor rear (See page 

BE–69

).

NG

Replace power window motor rear.

OK

5

Check voltage between power window control switch rear and battery, power
window control switch rear and body ground.

PREPARATION:
Disconnect the power window control switch rear connector.
CHECK:
Measure the voltage between terminals P3–4 (B) and P3–3 (E), and terminals P4–4 (B) and P4–3 (E) of the
power window control switch rear.
OK:

Voltage: 10 to 14 V

NG

Repair or replace harness or connector.

OK

6

Check wire harness and connector between power window motor rear and pow-
er window control switch rear (See page 

IN–35

).

NG

Repair or replace harness or connector.

OK

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

DI–1686

).

I18747

Body ECU

Instrument Panel J/B

HEAD

TAIL

A

G–Y

G

L–R (*1)

B6

13

7

9

H

T EL A

OFF

TAIL

HEAD

AUTO

Light
Control
Switch

16

W–B

1B

7

9

1F

J8
J/C

W–B

A

IE

10

14

12

(*1): w/ Automatic Light Control

B6

B6

C8 
Combination Switch

DI–1750

–

DIAGNOSTICS

BODY CONTROL SYSTEM

1944

Light control switch circuit

CIRCUIT DESCRIPTION

The body ECU detects the light control switch position and drives the DRL No. 4 and HEAD relays.
If the vehicle is equipped with an automatic light control system, the light control switch includes the AUTO
position.
The body ECU turns the headlights ON and OFF based on the ambient light level outside the vehicle, which
is detected by the automatic light control sensor.

WIRING DIAGRAM

DI1OL–27