Inspection 11 Brake Fluid Level Sensor System

INSPECTION PROCEDURE

1. CHECK SELF-DIAGNOSIS RESULT 
   1. Check the brake reservoir tank fluid level. If the level is low, add brake fluid.
   2. Erase self-diagnosis results and check self-diagnosis results.
   Fig 1: Self-Diagnosis Result Check Table

   Courtesy of NISSAN MOTOR CO., U.S.A.

   Is Above Displayed In Self-Diagnosis Display Items? 

   1. YES: GO TO 2.
   2. NO: Inspection END

2. CHECK CONNECTOR 
   1. Disconnect the brake fluid level sensor connector E21 and ABS actuator and electric unit (control unit) connector E24 and check terminal for deformation, disconnection, looseness, and so on. If there is any malfunction condition, repair or replace terminal.
   2. Securely reconnect connectors and Re-conduct self-diagnosis.

   OK or NG 

   1. OK: Connector terminal contact is loose, damaged, open or shorted.
   2. NG: GO TO 3.

3. CHECK HARNESS BETWEEN THE BRAKE FLUID LEVEL SENSOR AND ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) 
   1. Turn ignition switch OFF and disconnect the brake fluid level sensor connector E21, ABS actuator and electric unit (control unit) connectors E24.
   2. Check continuity between the brake fluid level sensor connector E21 and ABS actuator and electric unit (control unit) connector E24 and ground.

Fig 2: ABS Actuator And Electric Unit And Break Fluid Level Sensor Continuity

Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Checking Continuity Between Brake Fluid Level Sensor And ABS

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

1. OK: Connect connectors and conduct a ABS actuator and electric unit (control unit) self-diagnosis.
2. NG: If the open or short in harness, repair or replace harness.