Tachometer: Testing and Inspection

Tachometer Inspection:

1. Insert a paper clip into the engine revolution speed detection terminal in the engine compartment, and connect an engine tachometer to the clip.

NOTE:
1. For tachometer inspection, use of a fluxmeter-type engine speedometer is recommended. (Because a fluxmeter only needs to be clipped to the high tension cable.)
2. Because non-turbo vehicles do not have an engine revolution speed detection terminal, it is recommended that the above engine speedometer be used for these vehicles.

2. Compare the readings of the engine speedometer and the tachometer at every engine speed, and check it the variations are within the standard values.
Standard value:
Engine speed Indicated variation
1,000 r/min: ± 1OO r/min
3,000 r/min: ± 150 r/min
5,000 r/min: ± 250 r/min
6,000 r/min: ± 300 r/min