Tachometer: Testing and Inspection

INSPECT TACHOMETER/ON-VEHICLE
a. Connect a tune-up test tachometer, and start the engine.

NOTE:
- Reversing the connection of the tachometer will damage the transistors and diodes inside.
- When removing or installing the tachometer, be careful not to drop or subject it to heavy shocks.




b. Compare the tester and tachometer indications.







INSPECT TACHOMETER RESISTANCE
Measure the resistance between terminals with fixing pointer to the stopper.
If resistance value is not as specified, replace the meter.