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Home >> BMW >> 1983 >> 633CSi Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - BOSCH AFC >> Testing >> Electronic Control Unit

Electronic Control Unit

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Do not attempt to test ECU, as permanent damage could result. It is possible to check plug wires for continuity. The ECU should only be judged faulty after compression is checked, ignition system has been tested and found free of problems, and all other fuel injection components have been thoroughly tested (including wiring).