Toyota Sequoia (2005). Manual - part 460

I28569

Combination Meter:

C5–24

I28570

Combination Meter:

C6–12

C6–10

I28573

Vehicle Speed Sensor 
Wire Harness Side:

V1

–

DIAGNOSTICS

COMBINATION METER SYSTEM

DI–1635

1829

4

Check harness and connector (Vehicle speed sensor – combination meter and
vehicle speed sensor –  battery).

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

C5–24 – V1–3

Always

Below 1 

Ω

C6–10 – V1–2

Always

Below 1 

Ω

C6–12 – Body ground

Always

Below 1 

Ω

C5–24 – Body ground

Always

10 k

Ω 

or higher

C6–10 – Body ground

Always

10 k

Ω 

or higher

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

Tester connection

Condition

Specified condition

V1–1 – Body ground

Ignition switch OFF

Below 1 V

V1–1 – Body ground

Ignition switch ON

10 to 14 V

NG

Repair or replace harness or connector.

OK

Replace combination meter
(See page 

IN–35

).

I28559

E5

C5

ECU

TACH

Combination Meter

23

J/C

J14

D

J15

F

Y–G

Y–G

1

DI–1636

–

DIAGNOSTICS

COMBINATION METER SYSTEM

1830

Malfunction in tachometer

CIRCUIT DESCRIPTION

The indication on the tachometer is based on information that the ECM receives from the crankshaft position
sensor.

WIRING DIAGRAM

DID90–01

–

DIAGNOSTICS

COMBINATION METER SYSTEM

DI–1637

1831

INSPECTION PROCEDURE

HINT:
Start the inspection from step 1 when using the hand–held tester and start from step 3 when not using the
hand–held tester.

1

Perform active test by hand–held tester.

PREPARATION:
(a)

Connect the hand–held tester to the DLC3.

(b)

Turn the ignition switch to the 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

TACHOMETER

0 rpm / 1,000 rpm / 2,000 rpm / 3,000 rpm / 4,000

rpm / 5,000 rpm / 6,000 rpm / 7,000 rpm

Confirm that the vehicle is stopped and engine is

idling.

OK:

Tachometer readings change according to hand–held tester operation.

NG

Replace combination meter
(See page 

IN–35

).

OK

2

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

TACHO METER

Engine RPM /

Min.: 0 rpm Max.: 12,750 rpm

Almost the same as actual engine

speed (When engine is running)

OK:

Engine speed displayed on the tester is almost the same as the actual engine speed.

OK

Replace combination meter
(See page 

IN–35

).

NG

I28571

C5–23

Combination Meter:

I28567

GND

DI–1638

–

DIAGNOSTICS

COMBINATION METER SYSTEM

1832

3

Inspect combination meter.

PREPARATION:
(a)

Check the input signal waveform.
(1)

Remove the combination meter with the connectors
connected.

(2)

Connect the oscilloscope to terminal C5–23 and
body ground.

(3)

Start the engine.

CHECK:
Check signal waveform according to the condition(s) in the
table below.

Item

Condition

Tool setting

5 V/DIV, 10 ms/DIV

Vehicle condition

Engine idle speed

OK:

Waveform appears as shown in the illustration.

HINT:
As engine speed increases, the cycle of the signal waveform
narrows.

OK

Replace combination meter
(See page 

IN–35

).

NG