Engine Speed Sensor: Testing and Inspection

- Disconnect plug from EZ control unit.

EZ Control Unit Plug:

- Connect oscilloscope according to manufacturer's specifications.
Positive - terminal 7.
Negative - terminal 31d.

Engine Speed Sensor Signal:

- Crank engine. Should display above pattern.
- If voltage and engine speed signal are present, ignition coil must be triggered. If no engine speed signal is present, check resistance between terminals 7 and 31d. Should be 540 - 660 ohms.