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Home >> Infiniti >> 2012 >> M37 x >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Security Control System (With Intelligent Key System) >> DTC/Circuit Diagnosis >> Security Indicator Lamp >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK SECURITY INDICATOR LAMP POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect combination meter connector.
    3. Check voltage between combination meter harness connector and ground.
      (+) (-) Voltage (V) (Approx.)
      Combination meter
      Connector Terminal
      M53 1 Ground Battery voltage

      Is the inspection result normal? 

      YES: GO TO 2.

      NO-1: Check 15 A fuse [No. 9, located in the fuse block (J/B)].

      NO-2: Check harness for open or short between combination meter and fuse.

  2. CHECK SECURITY INDICATOR LAMP SIGNAL 
    1. Connect combination meter connector.
    2. Disconnect BCM connector.
    3. Check voltage between BCM harness connector and ground.
      (+) (-) Voltage (V) (Approx.)
      BCM
      Connector Terminal
      M120 23 Ground Battery voltage

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: GO TO  4.

  3. 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

  4. CHECK SECURITY INDICATOR LAMP CIRCUIT 
    1. Disconnect combination meter connector.
    2. Check continuity between combination meter harness connector and BCM harness connector.
      Combination meter BCM Continuity
      Connector Terminal Connector Terminal
      M53 28 M120 23 Existed
    3. Check continuity between combination meter harness connector and ground.
      Combination meter Ground Continuity
      Connector Terminal
      M53 28 Not existed

      Is the inspection result normal? 

      YES: Replace combination meter. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness.