0-36
REXTON 2007.09
8010-01
CIRCUIT
▶Standard Version C. WARNING LIGHTS AND INDICATORS
▶Engine Tachometer
The tachometer indicates engine speed in revolutions per minute. Multiply 1,000 to the
current number, then it will be the current number of engine revolutions.
Under the normal engine operating temperature, the proper idling speed is 750 ±
50 rpm for D27DT engine. The red zone (danger rpm range) starts from 4,500 rpm.
Connect the tachometer for tune-up test and start the engine.
Eliminate the hysteresis by tapping the tachometer.
Compare the values on the tester and tachometer and replace the tachometer if the
tolerance is excessive.
1)
2)
3)
▶Speedometer Gauge
The speedometer indicates the vehicle speed by calculating the signals from the rea
wheel speed sensors through ABS or ESP unit (speed signal cycle: 21 ms). If the
speedometer gauge vibrates, stops at a certain range or makes an abnormal noise, there
could be defectives in speedometer. However, these symptoms also could be occured
when the tire has uneven wear, different tire inflation pressures or different tire
specifications. Perform the speedometer test regarding the tolerance as described.
However, it is not similar simple work in field due to lack of measuring conditions such as
test equipment and preciseness.
Check the allowable tolerance of the speedometer and operations of the trip odometer
by using atester.
Check if the speedometer gauge is shaking and the abnormal noise sounds.
Eliminate the hysteresis by tapping the speedometer.
1)
2)
3)
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