Tachometer: Testing and Inspection
TACHOMETER INSPECTIONUsing NGS hand-held scan tool
1. Connect the SST (NGS set) to the data link connector-2 and battery.
2. Referring to the NGS operation manual, select the "PID DATA MONITOR" function.
3. Using the "PID DATA MONITOR" function, measure the engine speed.
4. Compare the values of the vehicle tachometer and the SST (NGS set).
5. If not as specified, inspect the wiring harness (PCM-instrument cluster).
6. If the wiring harness is normal, replace the tachometer.