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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 1195 (Vehicle Security (Theft Warning) System) >> Vehicle Security (Theft Warning) System >> Trouble Diagnoses >> Horn And Headlamp Alarm Check

Horn And Headlamp Alarm Check

WARNING: This page is about a different car, the 2004 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK BASE HORN SYSTEM OPERATION 

    Operate vehicle horn.

    OK or NG 

    1. OK: GO TO 2.
    2. NG: Check base horn system. Refer to HORN .
  2. CHECK HORN AND HEADLAMP ALARM OPERATION 

    With CONSULT-II 

    1. Select "ACTIVE TEST" in "THEFT WAR ALM" with CONSULT-II.
    2. Select "THEFT WAR ALM" and touch "ON".
    Fig 1: Identifying Horn And Headlamp Alarm Operation
    G00851730Courtesy of NISSAN MOTOR CO., U.S.A.

    Without CONSULT-II 

    1. Disconnect smart entrance control unit harness connector.
    2. Apply ground to smart entrance control unit harness connector terminal 4.
    Fig 2: Disconnecting Smart Entrance Control Unit Harness Connector
    G00851731Courtesy of NISSAN MOTOR CO., U.S.A.

    Refer to "SMART ENTRANCE CONTROL UNIT TERMINALS AND REFERENCE VALUE MEASURED BETWEEN EACH TERMINAL AND GROUND  ".

    OK or NG 

    1. OK: Horn and headlamp alarm is OK.
    2. NG: GO TO 3.
  3. CHECK VEHICLE SECURITY LAMP RELAY 

    Check vehicle security lamp relay. Refer to "VEHICLE SECURITY LAMP RELAY  ".

    OK or NG 

    1. OK: GO TO 4.
    2. NG: Replace relay.
  4. CHECK POWER SUPPLY FOR VEHICLE SECURITY LAMP RELAY 
    1. Disconnect vehicle security lamp relay connector.
    2. Check voltage between vehicle security lamp relay connector E43 terminal 1 (G/R) and ground.
    Fig 3: Identifying Lamp Relay Connector E43 Terminal (G/R) And Ground
    G00851732Courtesy of NISSAN MOTOR CO., U.S.A.

    Does battery voltage exist? 

    1. Yes: GO TO 5.
    2. No: Check the following.
      • 10A fuse (No. 35 located in the fuse and fusible link box)
      • Harness for open or short between relay and fuse
  5. CHECK VEHICLE SECURITY LAMP RELAY CIRCUIT 
    1. Check voltage between terminals of vehicle security lamp relay connector E43.
      Fig 4: Identifying Security Lamp Relay Connector
      G00851733Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: Check the following.
      • Harness for open between smart entrance control unit terminal 4 and relay
      • Harness for open or short between smart entrance control unit terminal 4 and horn relay
      • Diode-4 for open
      • Replace smart entrance control unit
    2. NG: Check the following.
      • Harness for open or short between vehicle security lamp relay and fuses
      • Harness for open or short between vehicle security lamp relay and headlamp system
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