Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 1397

ELECTRICAL-BODY AND CHASSIS  8-153

Meter connector pin arrangement
W/ Tachometer

Connector

Ter-

No.

minal No.

B-24

1

Ground

2

Ignition

3

Tachometer

4

-

5

-

6

Engine coolant temperature gauge

7

-

8

-

9

Check engine warning light

10

Diff. lock indicator light (South Africa only)

11

-

12

-

13

Illumination light (+)

14

Illumination light (-)

15

4WD indicator light

16

Turn signal indicator light (left)

Connector

Ter-

No.

minal No.

B-23

1

Turn signal indicator light (right)

2

-

3

High-beam indicator light (+)

4

High-beam indicator light (-)

5

Ground

6

-

7

-

8

Speedometer

9

Speedometer

10

Oil pressure warning light

11

Fuel gauge

12

Brake warning light

13

Charge warning light

14

Illumination light (+)

15

Illumination light (-)

16

Fuel warning light (Except Chile)

8-154  ELECTRICAL-BODY AND CHASSIS

SPEEDOMETER AND TACHOMETER

Speedometer On-Vehicle Inspection

Check the speedometer accuracy with a speedometer tester.
Carefully follow the tester manufacturer’s instructions.

km/h meter (Except Gulf, South Arfrica)

km/h

Indication

Permissible Range

20

17.2-22.8

40

37.2-42.8

60

57.2-62.8

80

77.2-82.8

100

97.3-103.7

120

117.3-123.7

140

137.3-143.7

160

156.9-164.1

km/h meter (For Gulf, South Arfrica)

km/h

Indication

Permissible Range

20

20-25.6

40

40-45.6

60

60-65.6

80

80-85.6

100

99.5-105.9

120

119.5-125.9

140

139.5-145.9

160

159.1-166.3

km/h meter

km/h

Indication

Permissible Range

20

17.5-22.5

40

37.5-42.5

60

57.5-62.5

80

77.5-82.5

100

97.6-103.4

120

117.6-123.4

140

137.6-143.4

160

157.2-163.8

km/h meter  (Except Gulf, South Arfrica)

km/h

Indication

Permissible Range

20

20-25

40

40-45

60

60-65

80

80-85

100

99.8-105.6

120

119.8-125.6

140

139.8-145.6

160

159.4-166

ELECTRICAL-BODY AND CHASSIS  8-155

Speedometer Off-Vehicle Inspection

Remove the speedometer from the meter assembly and
measure the resistance and the current consumption between
each terminal.
Speedometer Resistance

Tester

Terminal

terminal

symbol

Red (+)

Black (-) Black (-)

Red (+)

IGN

GND

IGN

GND

∞

30.6 - 37.4k

SEN

GND

SEN

GND

28.8 - 35.2k

∞

4P

GND

4P

GND

13.5 - 16.5k

∞

4P - GND

SEN - GND

IGN - GND

Note: Use the analog type circuit tester (range: 

× 1k).

Speedometer Current Consumption

Terminal

symbol

Current

consumption

Remarks

IGN - GND

+

-

85 

± 15mA

(when 12 

± 1V

applied)

No signal input

Note: 1. Use the analog type circuit tester.

2. Since the current consumption fluctuates when the

source voltage varies, check to be sure that the
voltage applied is 12V 

± 1V.

Tachometer On-Vehicle Inspection

1. Attach a tune-up tester to the engine.

2. Start the engine.

3. Compare the tachometer reading and the tester reading.

If  the  tachometer  indication  is  outside  the  permissible

range, the tachometer must be replaced.

4. Gradually increase and decrease the engine speed.

Note the movement of the tachometer needle.

If the needle movement is sluggish, the tachometer must be

replaced.

rpm

Indication

Permissible Range

1,000

940-1060

2,000

1875-2125

3,000

2850-3150

4,000

3820-4180

5,000

4820-5180

6,000

5820-6180

8-156  ELECTRICAL-BODY AND CHASSIS

Tachometer Off-Vehicle Inspection

Remove the tachometer from the meter assembly and
measure the resistance value and the current consumption
between each terminal.

Tachometer Resistance

Tester

Terminal

terminal

symbol

Red (+)

Black (-) Black (-)

Red (+)

IGN

GND

IGN

GND

∞

23 - 31k

P

GND

P

GND

28.8 - 35.2k

∞

P - GND

IGN - GND

Note: Use the analog type circuit tester (range: 

× 1k).

Tachometer Current Consumption

Terminal

symbol

Current

consumption

Remarks

IGN - GND

+

-

90 

± 15mA

(12 

± 1V when

voltage applied)

No signal input

Note: 1. Use the analog type circuit tester.

2.

Since the current consumption fluctuates as the
source voltage varies, check to be sure that the
voltage applied is 12V 

± 1V.