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Home >> Infiniti >> 1990 >> M30 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> DISTRIBUTORLESS Ignition System Checks (Q45) >> Ground Circuit
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Ground Circuit

  1. Turn ignition switch off. Disconnect ignition coil sub-harness connector and ignition coil relay harness connector. Check continuity between ignition coil relay harness connector terminal No. 5 (Brown/Yellow wire) and ignition coil sub-harness connector. Continuity should be present. If continuity is not present, check harness connector to ECU and ignition coil sub-harness connector.
  2. Disconnect power transistor unit harness connector. Check continuity between Black wire on harness connector and ground. Continuity should be present. If continuity is not present, check harness connector between power transistor unit and engine ground.
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