CHASSIS ELECTRICAL ± Combination Meters
54A-24
ON-VEHICLE SERVICE
SPEEDOMETER CHECK
1. Adjust the pressure of the tyres to the specified level.
(Refer to GROUP 31 ± Service Specifications.)
2. Set the vehicle onto a speedometer tester.
3. Use wheel chocks to hold the front wheels, and apply
the parking brake firmly.
4. To prevent the front wheels from moving from side to
side, attach tension bars to the tie-down hooks, and secure
both ends to anchor plates.
5. To prevent the vehicle from launching, attach a chain or
wire to the rear retraction hook, and make sure the end
of the chain or wire is secured firmly.
6. Check if the speedometer indicator range is within the
standard values.
Caution
Do not operate the clutch suddenly. Do not
increase/decrease speed rapidly while testing.
Standard values:
Standard indication km/h
(mph)
Allowable range km/h (mph)
40 (20) 40 ± 48 (20 ± 25)
80 (40) 80 ± 92 (40 ± 47)
120 (60) 120 ± 136 (60 ± 69)
160 (80) 160 ± 180 (80 ± 91)
± (100) ± (100 ± 114)
TACHOMETER CHECK
1. Insert a paper clip in the engine speed detection connector
from the harness side, and attach the engine speedometer.
NOTE
For tachometer check, use of a fluxmeter-type engine
speedometer is recommended. (Because a fluxmeter only
needs to be clipped to the high tension cable.)
2. Compare the readings of the engine speedometer and the
tachometer at every engine speed, and check if the
variations are within the standard values.
Standard values:
700 r/min: ±100 r/min
3,000 r/min: +150 r/min
±100 r/min
5,000 r/min: +325 r/min
±125 r/min
6,000 r/min: +375 r/min
±125 r/min
Wheel chocks
Tension bar
Front
Anchor plate
Engine tachometer
Engine
speed
detection
terminal
Paper clip
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