Isuzu KB P190. Manual — part 1324

8A-358 ELECTRICAL-BODY AND CHASSIS

With tachometer (HFV6)

RTW78AMF000601

Without tachometer (C24SE)

RTW78AMF000701

ELECTRICAL-BODY AND CHASSIS 8A-359

SPEEDOMETER AND TACHOMETER

Speedometer On-Vehicle Inspection

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

SPEEDOMETER (km/h)

RTW780SH000301

km/h meter

Permissible Range

Indication

EUROPE,

G.EXP

AUSTRALIA

20 20.2-24.5

20.2-24.3

40 40.6-44.9

41.7-46.0

60 60.9-65.2

62.6-66.9

80 81.5-85.8

83.4-87.7

100 102.0-106.3

104.4-108.7

120 122.5-126.8

125.1-129.4

140 143.1-147.4

146.1-150.4

160 163.7-168.0

166.7-171.0

180 184.2-188.5

187.3-191.6

200 204.6-208.9

208.4-212.7

SPEEDOMETER (mPH)

RTW78ASH001201

mPH meter

Permissible Range

Indication

G.EXP, EUROPE

20 20.5-23.2

40 40.9-43.6

60 62.2-64.9

80 83.2-85.9

100 104.2-106.9

120 125.2-127.9

8A-360 ELECTRICAL-BODY AND CHASSIS

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.

4JJ1-TC/4JA1T(L)/4JH1-TC

RTW780SH000401

rpm

Indication Permissible

Range

750 700-870

2,000 1915-2085

3,000 2915-3085

4,000 3950-4120

5,000 4950-5120

4JK1-TC

RTW780SH000501

Tachometer rpm

Indication Permissible

Range

750 700-870

2,000 1915-2085

3,000 2915-3085

4,000 3950-4120

5,000 4950-5120

C24SE

RTW78ASH001301

rpm

Indication Permissible

Range

1,000 950-1150

2,000 1900-2100

3,000 2900-3100

4,000 3900-4100

5,000 4900-5100

6,000 5950-6150

ELECTRICAL-BODY AND CHASSIS 8A-361

HFV6

RTW78ASH001401

rpm

Indication Permissible

Range

750 690-910

1,000 890-1110

2,000 1890-2110

3,000 2890-3110

4,000 3890-4110

5,000 4890-5110

6,000 5940-6160

7,000 6940-7160