SSANGYONG RODIUS 2004.09 Manual page 76

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(3) DESCRIPTIONS OF INDICATOR DISPLAY
CIRCUIT
RODIUS 2004.09
A. METER CLUSTER
▶Tachometer-Engine RPM Display
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 700 ~ 800 rpm. 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.
If the tachometer pointer vibrates, stands at a certain range or sounds abnormal noise, there
could be defectives in tachometer. If there is a difference between actual engine speed (rpm)
and reading from tachometer, connect a scanner and then compare the value on tachometer
with the reading from scanner.
B. Speedometer
The speedometer indicates the vehicle speed by calculating the signals from the rear right
wheel speed sensor through ABS or ESP unit.
If the speedometer pointer vibrates, stands at a certain range or sounds abnormal noise,
there could be defectives in speedometer. However, these symptoms also could be appeared
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 a tester.
- Check if the speedometer pointer is shaking and the abnormal noise sounds.
- Eliminate the hysteresis by tapping the speedometer.
The allowable tolerance increases when the tires are worn or the tire pressure is out of
specified range.