LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2003 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1581 (Body, Lock & Security System) >> Remote Keyless Entry System >> Key Switch (Insert) Check (Floor Shift)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Key Switch (Insert) Check (Floor Shift)

WARNING: This page is about a different car, the 2005 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK KEY SWITCH AND KEY LOCK SOLENOID INPUT SIGNAL 

    With CONSULT-II

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

    • When key is inserted to ignition key cylinder:

      KEY ON SW : ON 

    • When key is removed from ignition key cylinder:

      KEY ON SW : OFF 

      Fig 1: Checking Key Switch With CONSULT-II (Floor Shift)
      G03599952Courtesy of NISSAN MOTOR CO., U.S.A.

    Without CONSULT-II

    Check Voltage Between BCM Connector M18 Terminal 37 And Ground.

    Fig 2: Checking Voltage Between BCM Connector M18 Terminal 37 And Ground
    G03599953Courtesy of NISSAN MOTOR CO., U.S.A.
    VOLTAGE BETWEEN BCM CONNECTOR M18 TERMINAL 37 AND GROUND REFERENCE

    Connector Terminal (Wire color) Condition Voltage (V)
    (+) (-)
    M18 37 (B/R) Ground Key is inserted. Battery voltage
    Key is removed. 0

    OK or NG

    • OK : System is OK.
    • NG : GO TO 2.
  2. CHECK KEY SWITCH (INSERT) 
    1. Turn ignition switch OFF.
    2. Disconnect key switch and key lock solenoid connector.
    3. Check continuity between key switch and key lock solenoid terminals 3 and 4.
      Fig 3: Checking Continuity Between Key Switch And Key Lock Solenoid Terminals 3 And 4
      G03599954Courtesy of NISSAN MOTOR CO., U.S.A.
      KEY SWITCH CONTINUITY BETWEEN KEY SWITCH AND KEY LOCK SOLENOID TERMINALS 3 AND 4 REFERENCE

      Terminals Condition Continuity
      3 - 4 Key is inserted. Yes
      Key is removed. No

    OK or NG

    • OK : GO TO 3.
    • NG : Replace key switch and key lock solenoid.
  3. CHECK KEY SWITCH AND KEY LOCK SOLENOID CIRCUIT 
    1. Disconnect BCM connector.
    2. Check continuity between the BCM harness connector M18 terminal 37 (B/R) and key switch and key lock solenoid harness connector M27 terminal 4 (B/R).
    3. Check continuity between BCM harness connector M18 terminal 37 (B/R) and ground.

      37 (B/R) - 4 (B/R) : Continuity should exist 

      37 (B/R) - Ground : Continuity should not exist 

    4. Fig 4: Checking Continuity Between BCM Harness Connector M18 Terminal 37 And Key Switch And Key Lock Solenoid Harness Connector M27 Terminal 4 And Ground
      G03599955Courtesy of NISSAN MOTOR CO., U.S.A.

    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 key lock solenoid and fuse
    • NG : Repair or replace harness.