LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2007 >> Sentra SE-R >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Body, Lock & Security System >> Remote Keyless Entry System >> Key Switch Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Key Switch Check

  1. CHECK KEY SWITCH INPUT SIGNAL 

    With CONSULT-III 

    Check key switch "KEY ON SW" in DATA MONITOR mode with CONSULT-III. Refer to "DATA MONITOR ".

    • When key is inserted into ignition key cylinder:

      KEY ON SW : ON 

    • When key is removed from ignition key cylinder:

      KEY ON SW : OFF 

    Without CONSULT-III 

    Check voltage between BCM connector and ground.

    CONNECTOR TERMINAL VOLTAGE SPECIFICATION

    Connector Terminals Condition Voltage (V) (Approx.)
    ( + ) ( - )
    M18 37 Ground Key is inserted. Battery voltage
    Key is removed. 0
    Fig 1: Checking Voltage Between BCM Connector And Ground
    G04902460

    OK or NG 

    OK: Key switch circuit is OK.

    NG: GO TO 2.

  2. CHECK KEY SWITCH 
    1. Turn ignition switch OFF.
    2. Disconnect key switch connector.
    3. Check key switch.
      CONNECTOR TERMINAL CONTINUITY SPECIFICATION

      Terminals Condition Continuity
      1 - 2 Key is inserted. Yes
      Key is removed. No

    OK or NG 

    OK: Check the following.

    • 10A fuse [No. 19, located in fuse block (J/B)]
    • Harness for open or short between key switch and fuse
    • Harness for open or short between BCM and key switch
      Fig 2: Checking Key Switch
      G04927563

    NG: Replace key switch.

scientia non olet · About LEMON Manuals