FixVault
Home › Nissan-Datsun › 2005 › Sentra SE-R › Repair and Diagnosis › External Pages › Different car › Section 66 (Body, Lock & Security System) › Service Information › Power Door Lock System › Front Door Key Cylinder Switch LH Check

Front Door Key Cylinder Switch LH Check

WARNING: This page is about a different car, the 2009 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FRONT DOOR KEY CYLINDER SWITCH LH

    With CONSULT-III 

    Check front door key cylinder switch ("KEY CYL LK-SW") and ("KEY CYL UN-SW) in DATA MONITOR mode in CONSULT-III. Refer to "CONSULT-III FUNCTION (BCM) ".

    • When key inserted and front key cylinder is turned to LOCK:

      KEY CYL LK-SW : ON 

    • When key inserted and front key cylinder is turned to UNLOCK:

      KEY CYL UN-SW : ON 

      Without CONSULT-III 

      Check voltage between BCM connector M18 terminals 7, 8 and ground.

      VOLTAGE SPECIFICATION

      Connector Terminals Condition Voltage (V) (Approx.)
      (+) (-)
      M18 7 Ground Neutral/Lock 5
      Unlock 0
      8 Neutral/Unlock 5
      Lock 0
      Fig 1: Checking Voltage Between BCM Connector M18 Terminals 7, 8 And Ground
      G04927578Courtesy of NISSAN MOTOR CO., U.S.A.

      OK or NG 

      OK: Front door key cylinder switch LH signal is OK.

      NG: GO TO 2.

  2. CHECK FRONT DOOR KEY CYLINDER SWITCH LH GROUND HARNESS
    1. Turn ignition switch OFF.
    2. Disconnect front door key cylinder switch LH.
    3. Check continuity between front door key cylinder switch LH connector D9 terminal 4 and body ground.
      CONTINUITY CHART

      Connector Terminals Continuity
      D9 4 - Ground Yes
      Fig 2: Checking Continuity Between Front Door Key Cylinder Switch LH Connector D9 Terminal 4 And Body Ground
      G04927579Courtesy of NISSAN MOTOR CO., U.S.A.

      OK or NG 

      OK: GO TO 3.

      NG: Repair or replace harness.

  3. CHECK DOOR KEY CYLINDER SWITCH LH

    Check continuity between front door key cylinder switch LH terminals.

    CONTINUITY CHART

    Terminals Door key cylinder switch position Continuity
    4 - 6 Neutral/Unlock No
    Lock Yes
    4 - 5 Neutral/Lock No
    Unlock Yes
    Fig 3: Checking Continuity Between Front Door Key Cylinder Switch LH Terminals
    G04927580Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO 4.

    NG: Replace front door key cylinder switch LH. Refer to FRONT DOOR LOCK .

  4. CHECK DOOR KEY CYLINDER HARNESS
    1. Disconnect BCM connector M18.
    2. Check continuity between BCM connector M18 (A) terminals 7, 8 and front door key cylinder switch LH connector D9 (B) terminals 5, 6 and body ground.
      CONTINUITY CHART

      Connector Terminal Connector Terminal Continuity
      A: M18 7 B: D9 5 Yes
      8 6 Yes
      7 Ground No
      8 Ground No
      Fig 4: Checking Continuity Between BCM Connector M18 Terminals 7, 8 And Body Ground
      G04927581Courtesy of NISSAN MOTOR CO., U.S.A.

      OK or NG 

      OK: Front door key cylinder switch LH circuit is OK.

      NG: Repair or replace harness.

About FixVault