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Home >> Infiniti >> 2012 >> G25 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 17 (Security Control System) >> DTC/Circuit Diagnosis >> DTC B261A: Power Switch >> Diagnosis Procedure
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Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan Leaf. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK POWER SWITCH POWER SUPPLY CIRCUIT
    1. Turn power switch OFF.
    2. Disconnect power switch connector.
    3. Disconnect IPDM E/R connector.
    4. Check voltage between power switch harness connector and ground.
      VOLTAGE REFERENCE CHART

      (+) (-) Voltage (V) (Approx.)
      Power switch
      Connector Terminal
      M25 8 Ground 9 - 16

      Is the inspection result normal? 

      YES: Go to 2.

      NO: Go to  3.

  2. CHECK POWER SWITCH CIRCUIT 1
    1. Check continuity between power switch harness connector and IPDM E/R harness connector.
      CONTINUITY REFERENCE CHART

      Power switch IPDM E/R Continuity
      Connector Terminal Connector Terminal
      M25 8 E17 66 Existed
    2. Check continuity between power switch harness connector and ground.
      CONTINUITY REFERENCE CHART

      Power switch Ground Continuity
      Connector Terminal
      M25 8 Not existed

      Is the inspection result normal? 

      YES: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair harness or connector.

  3. CHECK POWER SWITCH CIRCUIT 2
    1. Disconnect BCM connector.
    2. Check continuity between power switch harness connector and BCM harness connector.
      CONTINUITY REFERENCE CHART

      Power switch BCM Continuity
      Connector Terminal Connector Terminal
      M25 8 M70 76 Existed
    3. Check continuity between power switch harness connector and ground.
      CONTINUITY REFERENCE CHART

      Power switch Ground Continuity
      Connector Terminal
      M25 8 Not existed

      Is the inspection result normal? 

      YES: Go to 4.

      NO: Repair harness or connector.

  4. REPLACE BCM
    1. Replace BCM. Refer to "REMOVAL AND INSTALLATION ".
    2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT.

      INSPECTION END