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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 1524 (Body, Lock & Security System) >> NVIS(NISSAN Vehicle Immobilizer System-NATS) >> Diagnostic Procedure 6 >> "Security Indicator Lamp Does Not Light Up"

"Security Indicator Lamp Does Not Light Up"

WARNING: This page is about a different car, the 2005 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUSE 

    Check 10A fuse [No. 19, located in the fuse block (J/B)]

    OK or NG

    • OK: GO TO 2.
    • NG: If fuse is blown, be sure to eliminate cause of problem before installing new fuse. Refer to "POWER SUPPLY ROUTING CIRCUIT ".
  2. CHECK SECURITY INDICATOR LAMP 
    1. Start engine and turn ignition switch OFF.
    2. Check the security indicator lamp lights up.
      • Security indicator lamp should light up. 

    OK or NG

    • OK: Inspection End.
    • NG: GO TO 3.
  3. CHECK SECURITY INDICATOR LAMP POWER SUPPLY CIRCUIT 
    1. Disconnect combination meter (security indicator lamp).
    2. Check voltage between security indicator lamp connector M23 terminal 31 and ground.
      Fig 1: Checking Voltage Between Security Indicator Lamp Connector M23 Terminal 31 & Ground
      G02448608Courtesy of NISSAN MOTOR CO., U.S.A.
      • 31 (Y/R) - Ground: Battery voltage 

    OK or NG

    • OK: GO TO 4
    • NG: Repair or replace harness.
  4. CHECK BCM (NATS CONTROL UNIT) FUNCTION 
    1. Connect security indicator lamp.
    2. Disconnect BCM.
    3. Check voltage between BCM connector M18 terminal 23 and ground.
      Fig 2: Checking Voltage Between BCM Connector M18 Terminal 23 & Ground
      G02448609Courtesy of NISSAN MOTOR CO., U.S.A.
      • 23 (G/O) - Ground: Battery voltage 

    OK or NG

    • OK: BCM is malfunctioning.
      • Replace BCM.
        • Ref. part No. A 
      • Perform initialization with CONSULT-II.
      • For initialization, refer to "CONSULT-II Operation Manual NATS-IVIS/NVIS".
    • NG: Check the following.
      • Harness for open or short between security indicator lamp and BCM (NATS control unit).
      • Indicator lamp condition