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Home >> Porsche >> 1986 >> 944 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - BOSCH AFC >> Testing >> Cu Power Supply

Cu Power Supply

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  1. Disconnect CU connector. Connect positive voltmeter lead to terminal No. 35 of CU harness connector. Connect negative test lead to terminal No. 5 of CU harness connector. Turn ignition switch to "RUN" position. Voltmeter should read battery voltage.
  2. Connect voltmeter positive test lead to terminal No. 18 of CU harness connector. Connect negative test lead to terminal No. 5 of CU harness connector. Turn ignition on. Voltmeter should read battery voltage.
  3. If no voltage is available, remove DME power relay. Using a jumper wire, connect terminals No. 30 and 87. Repeat voltage checks in step 1) and 2). On 944 series, connect voltmeter between terminals No. 3 of 9-pin connector and ground. If no voltage, check battery and related circuits.
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