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Home >> Infiniti >> 2002 >> Q45 >> Repair and Diagnosis >> External Pages >> Different car >> Section 216 (Engine Control System) >> Power Supply And Ground Circuit >> Diagnostic Procedure >> 5. Check ECM Ground Circuit For Open And Short-I

5. Check ECM Ground Circuit For Open And Short-I

WARNING: This page is about a different car, the 2004 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect ECM harness connector.
  2. Check harness continuity between ECM terminals 156, 159, 165, 168 and ground.

    Refer to Wiring Diagram.

    1. Continuity should exist. 
  3. Also check harness for short to power.

OK or NG 

OK: GO TO 7. CHECK POWER SUPPLY-II .

NG: GO TO 6.