Check all system connections before inspection. If the system is disconnected, incorrect peak voltage might be measured.
Check cylinder compression and check that the spark plugs are installed correctly in the cylinder.
![](https://motoinstruction.ru/img/honda/9/116543.jpg)
Disconnect the spark plug caps from the spark plugs. Connect known-good spark plugs to the spark plug caps and ground the spark plugs to the cylinder as done in a spark test.
With the ignition coil primary wire connected, connect the peak voltage adapter to the ignition coil.
Connection:
- Front: Yellow/blue (+) - body ground (-)
- Rear: Blue/yellow (+) - body ground (-)
Turn the ignition switch to "ON" and engine stop switch to "
![](https://motoinstruction.ru/img/honda/9/116545.jpg)
Check for initial voltage at this time.
The battery voltage should be measured.
If the initial voltage cannot be measured, check the power supply circuit (refer to the troubleshooting, page 17-2).
Avoid touching the spark plug and tester probes to prevent electric shock.
Crank the engine with the starter motor and read the ignition coil primary peak voltage.
Peak voltage: 100 V minimum.
![](https://motoinstruction.ru/img/honda/9/116544.jpg)
If the peak voltage is abnormal, check for an open circuit or poor connection in the Black/white wires.
If no defects are found in the harness, refer to the troubleshooting chart on page 17-2.