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Check Key Switch Circuit (Without Intelligent Key)

WARNING: This page is about a different car, the 2006 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK KEY SWITCH 

    With CONSULT-II 

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

    *: Refer to "DATA MONITOR ".

    MONITOR ITEM

    Monitor item [OPERATION or UNIT] Contents
    KEY ON SW* "ON/ OFF" Key inserted (ON)/key removed (OFF) status judged from the key-in detection switch is displayed.
    Fig 1: CONSULT-II Display - Data Monitor
    G04123134Courtesy of NISSAN MOTOR CO., U.S.A.

    Without CONSULT-II 

    GO TO 2.

    OK or NG

    • OK : Key switch circuit is OK.
    • NG : GO TO 2.
  2. CHECK KEY SWITCH POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect key switch connector.
    3. Check voltage between key switch connector M307 terminal 2 and ground.

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

    Fig 2: Identifying Voltage Between Key Switch Connector M307 Terminal 2 And Ground
    G04123135Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    • OK : GO TO 3.
    • NG : Check harness between key switch and fuse.
  3. CHECK KEY SWITCH 

    Check continuity between key switch connector M307 terminal 1 and 2.

    CONTINUITY SPECIFICATIONS

    Connector Terminal Condition Continuity
    M307 1 2 Key is inserted in ignition key cylinder. Yes
    Key is removed from ignition key cylinder. No
    Fig 3: Identifying Continuity Between Key Switch Connector M307 Terminal 1 And 2
    G04123136Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    • OK : GO TO 4.
    • NG : Replace key switch.
  4. CHECK HARNESS CONTINUITY 
    1. Disconnect key switch and connector and BCM connector.
    2. Check continuity between key switch connector M307 terminal 1 and BCM connector M1 terminal 37.

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

    3. Check continuity between key switch connector M307 terminal 1 and ground.

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

    Fig 4: Identifying Continuity Between Key Switch Connector M307 Terminal 1 And Ground
    G04123137Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    • OK : Key switch and circuit is OK.
    • NG : Repair or replace harness between key switch and BCM.
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