Toyota Sequoia (2005). Manual - part 860

BE0HV–12

I28402

Engine Room Relay Block No. 2

 DRL No. 4 Relay (*1)

 DIMMER Relay (*1)

 H–LP LL Fuse (*1)

 H–LP RL Fuse (*1)

 H–LP LH Fuse (*1)

 H–LP RH Fuse (*1)

Headlight

Combination Switch

 Light Control Switch

 Headlight Dimmer Switch

Ignition Switch

Taillight

Instrument Panel J/B

 Integration Relay 

 Taillight Relay

 Tail Fuse

Headlight

Engine Room J/B 

 HEAD Relay

 DRL Fuse (*1)

 H–LP LH Fuse (*2)

 H–LP RH Fuse (*2)

Automatic Light Control Sensor

(*1): w/ Daytime Running Light
(*2): w/o Daytime Running Light

–

BODY ELECTRICAL

HEADLIGHT AND TAILLIGHT SYSTEM

BE–25

3429

HEADLIGHT AND TAILLIGHT SYSTEM

LOCATION

BE0HW–09

F17994

Combination Switch

 Wiper and Washer Switch

Spiral Cable

Switch Body

Combination Switch

 Light Control Switch

 Headlight Dimmer Switch

Steering Angle 
Sensor

BE–26

–

BODY ELECTRICAL

HEADLIGHT AND TAILLIGHT SYSTEM

3430

COMPONENTS

I12794

13

16 1514

9

8

17

HI

AUTO

LO

OFF

Flash

TAIL

3

2 1

5 4

6

7

10

12 11

BE2MT–01

I18635

1

2

3

4

5

I05027

1

2

3

5

1

2

3

5

I18635

1

2

3

4

5

–

BODY ELECTRICAL

HEADLIGHT AND TAILLIGHT SYSTEM

BE–27

3431

INSPECTION

1.

INSPECT LIGHT CONTROL SWITCH CONTINUITY

Switch position

Tester connection

Specified condition

OFF

–

No continuity

TAIL

14 – 16

Continuity

HEAD

13 – 14 – 16

Continuity

AUTO

12 – 16

Continuity

If continuity is not as specified, replace the switch.
2.

INSPECT HEADLIGHT DIMMER SWITCH CONTINU-
ITY

Switch position

Tester connection

Specified condition

Flash

7 – 8 – 16

Continuity

Low beam

16 – 17

Continuity

High beam

7 – 16

Continuity

If continuity is not as specified, replace the switch.

3.

INSPECT HEAD RELAY CONTINUITY

Condition

Tester connection

Specified condition

Constant

1 – 2

Continuity

Constant

3 – 5

No continuity

Apply B+ between

terminals 1 and 2.

3 – 5

Continuity

If continuity is not as specified, replace the relay.

4.

INSPECT TAILLIGHT RELAY CONTINUITY

Condition

Tester connection

Specified condition

Constant

1 – 2

Continuity

Constant

3 – 5

No continuity

Apply B+ between

terminals 1 and 2.

3 – 5

Continuity

If continuity is not as specified, replace the relay.

5.

INSPECT DRL NO. 4 RELAY CONTINUITY (w/ Daytime
Running Light)

Condition

Tester connection

Specified condition

Constant

1 – 2

Continuity

Constant

3 – 5

No continuity

Apply B+ between

terminals 1 and 2.

3 – 5

Continuity

If continuity is not as specified, replace the relay.

I18559

1

2

3

4

5

I19450

I19451

BE–28

–

BODY ELECTRICAL

HEADLIGHT AND TAILLIGHT SYSTEM

3432

6.

INSPECT DIMMER RELAY CONTINUITY (w/ Daytime
Running Light)

Condition

Tester connection

Specified condition

Constant

1 – 2, 3 – 4

Continuity

Apply B+ between

terminals 1 and 2.

3 – 5

Continuity

If continuity is not as specified, replace the relay.

7.

AUTO ON:
INSPECT AUTOMATIC LIGHT CONTROL

(a)

Turn the ignition switch ON.

(b)

Turn the light control switch to AUTO.

(c)

Gradually cover the top of the sensor.

(d)

Check that the accessory lights and the headlights should
turn ON.

8.

AUTO OFF:
INSPECT AUTOMATIC LIGHT CONTROL

(a)

Gradually expose the sensor.

(b)

Check that the headlights and the accessory lights should
turn OFF.

9.

INSPECT LIGHTS–OFF CONDITION

(a)

Turn the ignition switch ON.

(b)

Lights auto ON:
Gradually cover the top of the sensor.

(c)

Check that the lights go off under the following conditions.
(1)

Light control switch is OFF.

(2)

The area surrounding the sensor gets bright.

(3)

After the ignition switch is turned OFF and after 30
sec. from when open doors are all closed.

10.

INSPECT LIGHTS–ON CONDITION

(a)

Open the driver’s door while the ignition switch is OFF.

(b)

Turn the light control switch to AUTO leaving the door
open and cover the top of the sensor. Make sure that the
lights go on when the ignition switch is turned ON.

11.

ADJUST AUTOMATIC LIGHT CONTROL SENSOR 
(See page 

DI–1684

)