Toyota Sequoia (2005). Manual - part 463

I28577

Wire Harness Connector
Front View:

R6

IG

T

E

–

DIAGNOSTICS

COMBINATION METER SYSTEM

DI–1647

1841

INSPECTION PROCEDURE

1

Read value of hand–held tester.

PREPARATION:
(a)

Connect the hand–held tester to the DLC3.

(b)

Turn the ignition switch ON, and push the hand–held tester main switch ON.

CHECK:
Operate the hand–held tester according to the steps on the display and select ”DATA LIST”.
METER:

Item

Measurement Item /

Range (Display)

Normal Condition

Diagnostic Note

LIGHT RHEOSTAT

Light Control Rheostat /

Min.: 0 Max.: 255

Light control rheostat switch is

Dark (0) 

→

 Bright (255)

OK:

Light brightness can be changed within the specified range by manual operation.

OK

Replace combination meter.
(See page 

IN–35

)

NG

2

Check harness and connector (Power source circuit).

PREPARATION:
Disconnect the R6 light control rheostat switch connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Terminal No. (Symbol)

Condition

Specified condition

R6–5 (E) – Body ground

Always

Below 1 

Ω

CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:

Terminal No. (Symbol)

Condition

Specified condition

R6–4 (T) – Body ground

Light control switch 

TAIL or HEAD

10 to 14 V

R6–1 (IG) – Body ground

Ignition switch ON

10 to 14 V

NG

Repair or replace harness or connector.

OK

I28569

Combination Meter:

C5–22

I28577

Light Control Rheostat Switch
Wire Harness Front View:

R6

TR

I28571

Combination Meter :

C5–22

DI–1648

–

DIAGNOSTICS

COMBINATION METER SYSTEM

1842

3

Check harness and connector (Light control rheostat switch – combination me-
ter).

PREPARATION:
Disconnect the C5 and E4 connectors of the combination me-
ter.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester Connection (Symbol)

Specified Condition

C5–22 – R6–3 (TR)

Below 1 

Ω

C5–22 – Body ground

10 k

Ω

 or higher

NG

Repair or replace harness or connector.

OK

4

Inspect combination meter.

PREPARATION:
Reconnect the combination meter connector.
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:

Tester connection

Condition

Specified condition

C5–22 – Body ground

Ignition switch ON, light

control switch OFF 

→

 ON

Below 1 V 

→

 10 to 14 V

NG

Replace combination meter
(See page 

IN–35

).

OK

I28576

270

°

 

Bright

0

°

 

Dark

R6

TR

ILL–

–

DIAGNOSTICS

COMBINATION METER SYSTEM

DI–1649

1843

5

Inspect light control rheostat switch.

PREPARATION:
(a)

Reconnect the light control rheostat switch connector.

(b)

Turn the ignition switch ON.

(c)

Turn the light control switch to the TAIL or HEAD position.

CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:

Tester connection 

(Symbol)

Condition

Specified condition

R6–3 (TR) – Body ground

Rheostat knob turned fully

counterclockwise 

→

 

fully clockwise

Below 1 V 

→

 10 to 14 V

R6–6 (ILL–) – Body

ground

Rheostat knob turned fully

counterclockwise 

→

 

fully clockwise

Below 1 V 

→

 10 to 14 V

NG

Replace light control rheostat switch.

OK

Replace combination meter
(See page 

IN–35

).

I28562

Combination Meter

Instrument Panel J/B

Engine Room J/B

I18
Ignition SW

Front Seat 
Inner Belt 
(Buckle
SW LH)

*1: w/ Power Seat
*2: w/o Power Seat

Battery

BH

IE

J8
J/C

F10
FLB

BI2

J24
J/C

4

5

B

B

B

B

A

C5

C6

12

24

C6

4

Seat
Belt

Buzzer

2D

2C

1

1

AM2

1F

1C

1D

1H

1C

1J

2

11

9

3

7

6

IGN1

5

6

AM2

IG2

W–B

B–O

BR

W–R

W–B

(*1)

(*2)

W–B

(*1)

W–B

(*1)

(*1)

(*2) (*1)

(*1)

(*1)

G–Y

G–Y

G–Y

(*2)

1

3

3

2

13

B16 B16

B16 B16

W–R

G–Y

B–R

W–R

BI2

IN1

3

13

W–B

(*2)

DI–1650

–

DIAGNOSTICS

COMBINATION METER SYSTEM

1844

Seat belt warning for driver’s seat does not operate

CIRCUIT DESCRIPTION

A buzzer and indicator are included in the seat belt warning system. When the ignition switch is ON and the
seat belt on the driver side is not fastened, both the buzzer and indicator operate.
The buzzer and indicator are built into the combination meter.

WIRING DIAGRAM

DID94–01