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Home >> Infiniti >> 2012 >> M35h >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Component Testing >> Sensor Power Supply2 Circuit >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK GROUND CONNECTION
    1. Turn ignition switch OFF.
    2. Check ground connection M95. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair or replace ground connection.

  2. CHECK SENSOR POWER SUPPLY 2 CIRCUIT
    1. Disconnect following sensors harness connector.
    2. Check harness for short to power and short to ground, between the following terminals.
      ECM Sensor
      Connector Terminal Name Connector Terminal
      F101 46 CKP sensor F2 1
      45 Battery current sensor B10 1
      F102 64 EVT control position sensor (bank 2) F19 1
      CMP sensor (bank 2) F18 1
      74 Mass air flow sensor (bank 1) F31 1
      Mass air flow sensor (bank 2) F42 1
      M107 107 Refrigerant pressure sensor E77 3

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair short to ground or short to power in harness or connectors.

  3. CHECK COMPONENTS

    Check the following.