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Home >> Porsche >> 1988 >> 924 Automatic >> Repair and Diagnosis >> Engine Performance >> System >> DME Digital Engine Control >> Diagnosis & Testing >> Reference Mark Sensor Check

Reference Mark Sensor Check

  1. Using same LED tester as used for testing speed sensor, connect positive lead to CU harness connector terminal No. 25 and negative lead to terminal No. 26.
  2. Disconnect and ground coil wire. Crank engine over. If sensor is sending a signal, LED should flicker dimly.
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