3.4 Testing Hall Sender and Ignition Control Unit (all except CIS-E Motronic and Digifant I)The Hall sender and ignition control unit only need to be tested if there is no spark at the spark plugs when tested. For these tests, the spark plug wires and ignition coil should be in good condition as described in 3.3 Testing Coil and Spark Plug Wires. The ignition control unit is located in the driver's side cowling, above and behind the firewall, beneath the drip tray. The Hall sender connector is on the side of the distributor. These tests require the use of a high-impedence 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.
If it becomes necessary to remove or replace the ignition control unit, carefully clean the mounting surface between the control unit and the heat sink before installing. Trapping dirt or other debris beneath the control unit may damage the internal circuitry when the mounting screws are tightened. |
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