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Home >> Nissan-Datsun >> 2011 >> Sentra SE-R >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control System >> VDC/TCS/Abs >> Service Information >> Trouble Diagnosis For Self-Diagnostic Items >> Brake Fluid Level Switch System Inspection >> Inspection Procedure

Inspection Procedure

  1. SELF-DIAGNOSIS RESULT CHECK
    1. Check the brake reservoir tank fluid level. If the level is low, add brake fluid.
    2. Erase the self-diagnosis results and check the self-diagnosis results.
      SELF-DIAGNOSIS RESULTS

      Self-diagnosis results
      BR FLUID LEVEL LOW

      Is the above displayed in the self-diagnosis display items? 

      YES: GO TO 2.

      NO: Inspection End.

  2. CONNECTOR INSPECTION
    1. Disconnect the ABS actuator and electric unit (control unit) and brake fluid level switch connectors.
    2. Check the terminals for deformation, disconnection, looseness or damage.

      OK or NG 

      OK: GO TO 3.

      NG: Repair or replace as necessary.

  3. CHECK BRAKE FLUID LEVEL SWITCH
    1. Turn ignition switch OFF.
    2. Check continuity between brake fluid level switch terminals 1 and 2.
      VOLTAGE AND CONTINUITY SPECIFICATIONS

      Brake fluid level switch terminals Condition Continuity
      1- 2 Brake fluid reservoir full No
      Brake fluid reservoir empty Yes
      Fig 1: Checking Continuity Between Brake Fluid Level Switch Terminals 1 And 2
      G04887283Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      YES: GO TO 4

      NO: Replace brake fluid level switch.

  4. CHECK BRAKE FLUID LEVEL SWITCH HARNESS
    1. Disconnect combination meter connector.
    2. Check continuity between combination meter connector M24 (A) terminal 25 and brake fluid level switch connector E40 (B) terminal 1.

      25 - 1 : Continuity should exist. 

    3. Check continuity between combination meter connector M24 (A) terminal 25 and ground.

      25 - Ground : Continuity should not exist. 

      Is the inspection result normal? 

      YES: GO TO 5

      NO: Repair or replace malfunctioning components.

      Fig 2: Checking Continuity Between Combination Meter Connector M24 (A) Terminal 25 And Ground
      G06552608Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK BRAKE FLUID LEVEL SWITCH GROUND CIRCUIT

    Check continuity between brake fluid level switch connector E40 (B) terminal 2 and ground.

    2 - Ground : Continuity should exist. 

    Is the inspection result normal? 

    YES: Inspection End.

    NO:

    • Repair or replace malfunctioning components.
    • Perform the self-diagnosis, and make sure that the result shows "NO DTC IS DETECTED".
      Fig 3: Checking Continuity Between Brake Fluid Level Switch Connector E40 (B) Terminal 2 And Ground
      G04887285Courtesy of NISSAN MOTOR CO., U.S.A.