Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 1326

8–224 ELECTRICAL-BODY AND CHASSIS

CIRCUIT DIAGRAM  (W/ TACHOMETER – DIESEL ENGINE (RHD))

D08RVA02

TIMING BELT

3

F-1

P-1

P-5

30B/Y

+

_

B2

OFF

IG2

ACC

STARTER SW

B1

ST

IG1

6

3 B/R

3 B/R

CB-5
15A METER

IGN B1
40A

P-2

P-10

P-7

5B/Y

ENG.

FRAME

1

0.5 B

0.85 B

0.85 B

0.5 B

F-1

1

0.3 P

0.5 Y/R

11

THERMO UNIT

0.5 Y/B

0.5 Y/B

4

1

3

0.5 B/R

0.5 Y/B

9

12

2

3

H-4

11

H-9

5

H-8

0.85 B

1

5

11

TACHOMETER

FUEL

B-23

B-24

B-23

E-19

E-44

H-4

17

H-9

E-44

E-44

F-1

H-4

H-4

1

0.5  B/R

0.5P

H-15

VEHICLE SPEED

SENSOR

H-6

14

QOS-II

CONTROL UNIT(7)

0.3 O/L

C-41

4

H-7

0.85Y

0.85Y

SPEEDOMETER

FUEL GAUGE

ENGINE COOLANT 

TEMPERATURE GAUGE

GLOW

SEDIMENTER

0.85 Y

0.85 B

0.85 B

1.25

FENDER-LH

C-36

FENDER-RH

C-2

6

B-24

5

B-23

B-23

16

B-24

8

FUEL TANK UNIT

0.5 BR/Y

0.5 BR/Y

0.5 L/B

0.5 L/B

0.5 L/B

H-15

8

10

H-9

H-15

7

0.5 Y/R

2

3 W/B

15B/R

0.85Y

0.85Y

10

H-6

22

H-6

16

H-6

17

H-6

METER

0.3 P

0.5 Y/R

7

H-4

0.5 B/R

2

E-36

0.5  B

TACHO SENSOR

1

FUEL FILTER SW

C - 51

C - 52

0.5 B

1.25 B

E-36

B-24

9

H-8

8

1

3

C-41

2

B-24

矢崎

E-3110-8

'96/ 10/ 2

'96/ 10/ 2

D 0 8 R V A 0 2

T F A

'97 TFR/S EXP.-RHD
METER(DIE.W/ TACHO)-1

大野

資料区分

品名 又は
電装タイトル

ユニットタイプ

対象車型

いすゞ品番

Ｊ−Ｎｏ．

ｲﾗｽﾄ番号・追番

Ｂ Ｋ Ｔ Ｇ Ｓ

イラスト区分

資料番号(Pub.No.)

L D C

W O Y T S

発注者

受注番号

発注日

希望納期

ｲﾗｽﾄｻｲｽﾞ

×

ﾊﾟｰﾂｲﾗｽﾄ番号

ｲﾗｽﾄ担当

180

240

4556

作業番号

ELECTRICAL-BODY AND CHASSIS 8–225

D08RVA04

R-4

1

2

C-37

C-37

1

H-9

16

H-8

3

B-23

RELAY;CHARGE(5) OR

AC GENERATOR(L)

B-23

13

CHARGE

0.85 W/L

C-39

BRAKE FLUID LEVEL SW

H-6

H-6

H-6

20

7

2

H-6

5

4WD SW

1.25B

1

1

B-23

12

B-24

15

H-4

H-4

TURN-LH

TURN-RH

4WD

BRAKE

E-45

E-46

12

H-4

DIMMER

・PASSING  SW

ILLUMINATION

1

0.3 P/B

0.5 P/B

0.5 P/G

0.5 P/G

0.5 P/G

0.5 P/G

4

HIGH BEAM

B-24

1

C-37

B-23

15

0.5B

0.5B

1.25B

1.25B

0.85B

0. 5R/B

B-24

14

3

COMBINATION SW 

HAZARD WARNING SW

1

0.85G/W

FUSE EB-8

3

B-23

B-23

COMBINATION SW 

HAZARD WARNING SW

16

0.85G/W

B-24

RELAY;TAIL(1)

13

0.85 G/R

B-24

14

B-23

0.85 G/R

0.85B

0.85B

0.5B

0.5B

0.5P/G

1.25B

15

1

BODY-RH

C-2

B-28

FENDER-RH

VACUUM SW

PARKING BRAKE SW(4

×

2)

PARKING BRAKE SW(4

×

4)

1

C-38

OIL PRESSURE SW

1

E-1

0.5R/W

0.3L/R

B-23

10

OIL PRESSURE

0.3L

0.5L

0.5L

0.5L/R

0.5L/R

矢崎

E-3110-8

'96/ 10/ 22

'96/ 10/ 29

D 0 8 R V A 0 4

T F A

'97 TFR/S EXP.-RHD
METER(DIE.W/TACHO)-2

大野

資料区分

品名 又は
電装タイトル

ユニットタイプ

対象車型

いすゞ品番

Ｊ−Ｎｏ．

ｲﾗｽﾄ番号・追番

Ｂ Ｋ Ｔ Ｇ Ｓ

イラスト区分

資料番号(Pub.No.)

L D C

W O Y T S

発注者

受注番号

発注日

希望納期

ｲﾗｽﾄｻｲｽﾞ

×

ﾊﾟｰﾂｲﾗｽﾄ番号

ｲﾗｽﾄ担当

180

240

4556

作業番号

H-8

2

H-8

9

H-8

4

9

H-6

8–226 ELECTRICAL-BODY AND CHASSIS

TROUBLE SHOOTING

SPEEDOMETER

1.

Speedometer and odometer do not function

Checkpoint

Trouble Cause

Countermeasure

Vehicle speed sensor
malfunction

Replace the vehicle speed
sensor

Check the vehicle speed
sensor output 
(4 pulses/1 rotation)

Open circuit or poor
connector contact

Repair an open circuit in
the circuit or a poor
connection at the
connectors

Continuity between the
vehicle speed sensor and
the meter, or the fuse (LHD:
CB-7 (15A)/RHD: CB-5 (15A))
and the ground

Speedometer malfunction

Replace the speedometer

Use a meter tester to check
the speedometer function

OK

OK

NG

NG

NG

2.

Speedometer needle fluctuates
(May be wide fluctuation)

Vehicle speed sensor
malfunction, or open circuit
or poor connector contact

Replace the vehicle speed
sensor, or repair an open
circuit in the circuit or a
poor connection at the
connectors

Check the speed sensor
output by using the
oscilloscope

Speedometer malfunction

Replace the speedometer

Use a meter tester to check
the speedometer function

OK

NG

NG

ELECTRICAL-BODY AND CHASSIS 8–227

3.

Speedometer needle jumps erratically

Checkpoint

Trouble Cause

Countermeasure

4.

Trip odometer does not reset

Faulty reset mechanism or
worn gear

Replace the speedometer

Check at other mileage
figures given by meter
tester (Reset should be
made to zero kilometer)

NG

Vehicle speed sensor
malfunction, or open circuit
or poor connector contact

Replace the vehicle speed
sensor, or repair an open
circuit in the circuit or a
poor connection at the
connectors

Check the vehicle speed
sensor output by using the
oscilloscope

Speedometer malfunction

Replace the speedometer

Use a meter tester to check
the speedometer function

OK

NG

NG

Inspection of a waveform by oscilloscope

1. Connect a resistance of 1.3 to 5k ohm (1.4W or more) between the harness side connectors 2 B-24

and 9 B-23   of the meter.

2.
2.
3.

Install a speedometer tester.
Turn on the starter SW.
Check the waveform at the time when the vehicle speed is at 60km/h.

Normal waveform

0V

23.6m sec.

2V or less

Approximate battery voltage - 2V

9

8

7

6

5

4

3

2

1

16

15

14

13

12

11

10

B-24

B-23

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

825RV108