The Hall sender and coil power stage should be tested if there is no spark at the spark plugs when tested. These tests also check the Digifant control unit response to the Hall sender signal. For these tests, the spark plug wires and ignition coil should be in good condition. See 3.3 Testing Coil and Spark Plug Wires. The Hall sender connector is on the side of the distributor. The coil power stage is located atop the coil.

These tests require the use of a high-impedance voltmeter or low-current LED test light. For more information, see 3.1 Basic Troubleshooting Principles. The sequence of the tests below is important. Follow the test sequence as it is presented in order to logically isolate the faulty component.