Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 1223

8-232  ELECTRICAL-BODY AND CHASSIS 

 

 

ELECTRICAL-BODY AND CHASSIS  8-233 

CIRCUIT DIAGRAM (W/ TACHOMETER-UK) 

8

B-23

QOS/EGR/QWS

CONTROL UNIT(16)

QOS/EGR/QWS

CONTROL UNIT(5)

0.3W

20

H-8

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

F-1

1

0.5 Y/R

11

THERMO UNIT

0.5 Y/B

0.5 Y/B

0.85 B

0.85 B

4

1

3

0.5 B/R

0.5 Y/B

9

1

2

3

H-5

12

H-4

5

H-8

0.85 B

1

2

3

TACHOMETER

FUEL

B-23

B-24

B-23

E-19

E-44

H-4

E-44

E-44

F-1

H-5

H-5

1

0.5  B/R

0.5P

H-15

VEHICLE SPEED

SENSOR

H-8

11

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 B

FENDER-LH

C-36

BODY-RR

B-34

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

H-15

7

2

3 W/B

8B/R

0.85Y

0.85Y

10

H-6

22

H-6

12

H-8

16

H-8

METER

0.3 P

0.5 Y/R

7

H-4

0.5 B/R

2

E-36

0.5  B

0.5  B

TACHO SENSOR

2

FUEL FILTER SW C-30

C-30

0.5 B

1.25 B

E-36

B-24

9

H-8

8

1

3

C-41

2

B-24

 

 

8-234  ELECTRICAL-BODY AND CHASSIS 

SDM(7)

B-37

2

0.5G

FUSE CB-24

1

0.5 Y/G

B-37

AIR BAG

R-4

1

2

C-37

C-37

1

H-9

14

H-8

3

B-23

RELAY;CHARGE(5)

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

1

H-5

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

15

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

11

BODY-LH

C-2

B-9

BODY-RH

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

0.85L

0.5L/R

0.5L/R

H-8

2

H-8

4

H-8

14

9

H-6

RR FOG

SEAT BELT

LIGHTING
SWITCH

(W/O POWER WINDOW)

(W/O POWER WINDOW)

B-24

10

0.5P/W

0.5G/Y

0.5G/Y

B-24

7

H-9

5

0.5B

2B

2B

0.85B

0.85B

SEAT BELT SW

1

R-3

4

H-9

5

H-19

2

R-3

H-19

8

 

 

ELECTRICAL-BODY AND CHASSIS  8-235 

TROUBLES HOOTING 

SPEEDOMETER 

1.  Speedometer and odometer do not function 
 

Checkpoint  

Trouble 

Cause 

 

Countermeasure 

 

Replace the vehicle speed
sensor

Vehicle speed sensor
malfunction

NG

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

Open circuit or poor connector
contact

Replace the speedometer

Use a meter tester to check
the speedometer function

Speedometer malfunction

NG

NG

OK

OK

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

 

 
 
2.  Speedometer needle fluctuates 
 

(May be wide fluctuation) 

 

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

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

NG

Replace the speedometer

Use a meter tester to check
the speedometer function

Speedometer malfunction

NG

OK

Check the speed sensor
output by using the
oscilloscope