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Check Key Switch Circuit (Without Intelligent Key)

  1. CHECK KEY SWITCH (WITH CONSULT-II) 

    With CONSULT-II 

    Touch "BCM". With "IGN KEY SW" on the DATA MONITOR, Check ON/OFF operation.

    *: Refer to "DATA MONITOR "

    MONITOR ITEM CHART

    Monitor item [OPERATION or UNIT] Contents
    IGN KEY SW* "ON/OFF" Key inserted (ON)/key removed (OFF) status judged from the key-in detection switch is displayed.

    OK or NG 

    OK : Key switch circuit is OK.

    NG : GO TO 2.

    Fig 1: CONSULT-II Function Display - DATA MONITOR
    G04077741Courtesy of NISSAN MOTOR CO., U.S.A.
  2. CHECK KEY SWITCH AND KEY LOCK SOLENOID POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect key switch connector.
    3. Check voltage between key switch connector M23 terminal 2 and ground.

      2 (L/R) - Ground : Battery voltage. 

    OK or NG 

    OK : GO TO 3.

    NG : Check harness between key switch and fuse.

    Fig 2: Identifying Voltage Between Key Switch Connector M23 Terminal 2 And Ground
    G04077742Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK KEY SWITCH 

    Check continuity between key switch connector M23 terminal 1 and 2.

    TERMINAL CONTINUITY CHART

    Connector Terminal Condition Continuity
    M23 1 2 Key is inserted in ignition key cylinder. Yes
    Key is removed from ignition key cylinder. No

    OK or NG 

    OK : GO TO 4.

    NG : Replace key switch.

    Fig 3: Identifying Continuity Between Key Switch Connector M23 Terminal 1 And 2
    G04077743Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK HARNESS CONTINUITY 
    1. Disconnect key switch connector and BCM connector.
    2. Check continuity between key switch connector M23 terminal 1 and BCM connector M3 terminal 37.

      1 (B/W) - 37 (B/W) : Continuity should exist. 

    3. Check continuity between key switch connector M23 terminal 1 and ground.

      1 (B/W) - Ground : Continuity should not exist. 

      Fig 4: Identifying Continuity Between Key Switch Connector M23 Terminal 1 And Ground
      G04077744Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK : Key switch circuit is OK.

    NG : Repair or replace harness between key switch and BCM.

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