Toyota Sequoia (2005). Manual - part 462

I28569

C5–26

Combination Meter:

I28570

C6–12

Combination Meter:

C6–11

I28575

Fuel Sender Gauge
Connector Front View:

F19

–

DIAGNOSTICS

COMBINATION METER SYSTEM

DI–1643

1837

4

Check harness and connector (Fuel sender gauge – combination meter).

PREPARATION:
Disconnect the combination meter connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:

Tester connection

Condition

Specified condition

C5–26 – F19–2

Always

Below 1 

Ω

C6–11 – F19–3

Always

Below 1 

Ω

C6–12 – Body ground

Always

Below 1 

Ω

C5–26 – Body ground

Always

10 k

Ω 

or higher

C6–11 – Body ground

Always

10 k

Ω 

or higher

NG

Repair or replace harness or connector.

OK

Replace combination meter
(See page 

IN–35

).

DI–1644

–

DIAGNOSTICS

COMBINATION METER SYSTEM

1838

Malfunction in engine coolant temperature receiver gauge

CIRCUIT DESCRIPTION

The ECM receives an engine coolant temperature signal from the engine coolant temperature sensor and
sends it to the A/C ECU.
The combination meter receives the signal from the A/C ECU through multiplex communication. Therefore,
if a malfunction occurs in the engine coolant temperature receiver gauge, there may be a malfunction in the
multiplex communication system, air conditioning system, or engine system.
(Multiplex communication system: See page 

DI–1892

)

(Air conditioning system: See page 

DI–2301

)

(Engine system: See page 

DI–9

)

INSPECTION PROCEDURE

1

Perform active test by 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:
From the display on the tester, perform the ”ACTIVE TEST”.
METER:

Item

Test Details

Diagnostic Note

COOLANT TEMP

HIGH / NORMAL / LOW (OFF)

Confirm that the vehicle is stopped and engine is

idling.

OK:

Engine coolant temperature receiver gauge readings change according to hand–held tester op-
eration.

OK

Go to engine system or air conditioning system
(See page 

DI–9

 or 

DI–2301

).

NG

Replace combination meter
(See page 

IN–35

).

DID92–01

–

DIAGNOSTICS

COMBINATION METER SYSTEM

DI–1645

1839

Operating light control rheostat does not change light brightness

CIRCUIT DESCRIPTION

Illumination intensity of the meter is increased by turning the knob of the light control rheostat switch clock-
wise, and it is decreased by turning the knob counterclockwise.

DID93–01

I28561

R6
Rheostat

To Each
Illumination Parts

To Each
Illumination Parts

Instrument Panel J/B

Combination Meter

I18
Ignition SW

J8
J/C

Sub J/B No. 3

F10
Fusible Link Block

Engine Room J/B

Battery

IE

T

ILL–

E

TR

IG

C5

C6

12

22

24

C6

Illumination

1F

1J

1C

1D

1H

1C

1C

8

2

11

9

3

4

13

6

IGN1

AM1

1H

1E

1C

4

1

1F

1L

6

7

5

6

1

2

2D

ECU–IG

2

1

8

8

3A

3E

8

4

5

1

3

4

5

6

ALT

AM2

IG2

AM2

1

1

2C

A

A

AM1

IG1

G

W–G

W–B

BR

W–G

W–G

W–B

W–G

B–R

B–Y

B–O

B–R

W

W–L

W–R

B–R

B

W–R

B

DI–1646

–

DIAGNOSTICS

COMBINATION METER SYSTEM

1840

WIRING DIAGRAM