Ignition Control Module: Testing and Inspection

Ignition Coil With Power Stage:

- With the ignition "OFF" remove the high tension coil wire from the ignition coil output terminal (terminal 4).

- Disconnect the power stage harness connector.

Electrical Connector View:

- Connect a suitable volt/ohm meter between terminals 1 and 3 of the power stage harness connector.

CAUTION: Always turn the ignition switch "OFF" before changing meter ranges, and before disconnecting or connecting the meter probes. Doing so with the ignition switch turned "ON" risks permanent control unit damage.

- Turn ignition switch "ON".

- The correct reading should be battery voltage (approx. 12 VDC).

- If not wiring harness may be defective check and repair as necessary.

- Turn ignition switch "OFF". Disconnect the multimeter.

- Connect an LED test light between terminals 1 and 2 of the power stage harness connector.

- With the ignition switch crank the engine briefly, then turn ignition switch "OFF".

- The LED light must flicker.

- If the LED test light does not flicker, the Hall sender, the Digifant control unit, or the wiring may be defective.

- If the test light does flicker continue.

- With the ignition "OFF", reconnect the fuel injector main harness connector, coil wire, and the power stage harness connector.

Digifant I Coil Power Stage Connector:

- Connect a suitable volt/ohm meter between terminals 1 and 15 of the ignition coil.

- Turn the ignition switch "ON".

- The voltage at the ignition coil should briefly rise to at least 2 volts, then drop to zero volts after 1 to 2 seconds.

- If the correct results are not obtained replace the ignition power stage.