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Home › Nissan-Datsun › 2003 › Sentra SE-R, Automatic › Repair and Diagnosis › External Pages › Different car › Section 1430 (Brake Control System) › Trouble Diagnosis › Inspection 1: Wheel Sensor Circuit › Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK TIRE 

    Check air pressure, wear and size.

    Are air pressure, wear, and size within the standard values? 

    1. YES: GO TO 2.
    2. NO: Adjust air pressure, or replace tire.
  2. CHECK SENSOR AND SENSOR ROTOR 
    • Check the condition of the sensor mount (for looseness, etc.).
    • Check the surface of front sensor rotor rubber for damage.
    • Check rear sensor rotor for damage.

    OK or NG 

    1. OK: GO TO 3.
    2. NG: Repair sensor mount or replace sensor rotor.
  3. CHECK SELF-DIAGNOSTIC RESULTS 

    Check the self-diagnostic results.

    Self-diagnostic results

    FR RH SENSOR-1,-2

    FR LH SENSOR-1,-2

    RR RH SENSOR-1,-2

    RR LH SENSOR-1,-2

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

    1. YES: GO TO 4.
    2. NO: INSPECTION END
  4. CHECK CONNECTOR 
    1. Disconnect ABS actuator and electric unit (control unit) connector and malfunctioning wheel sensor connector E46 (FR-LH), E33 (FR-RH) or B69 (RR). Check terminal for deformation, open circuit, poor contact, etc., and repair or replace if any malfunctioning condition is found.
    2. Reconnect connectors, drive at a speed of approximately 30 km/h (19 MPH) or more for approximately 1 minute, and perform self-diagnosis.

    OK or NG 

    1. OK: Connector terminal contact is loose, damaged, open or shorted.
    2. NG: GO TO 5.
  5. CHECK WHEEL SENSOR HARNESS 
    1. Turn ignition switch OFF and disconnect malfunctioning wheel sensor connector E46 (FR-LH), E33 (FR-RH) or B69 (RR) and ABS actuator and electric unit (control unit) connector.
    2. Check continuity between terminals. (Also check the continuity when steering wheel is turned right and left and when sensor harness inside wheel well is moved.)
      Fig 1: Checking Wheel Sensor Harness
      G02368371Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 2: Wheel Sensor Harness Continuity Chart
      G02368372Courtesy of NISSAN MOTOR CO., U.S.A.
    1. Power supply circuit: Continuity should exist. 
    2. Signal circuit: Continuity should exist. 
    3. Ground circuit: Continuity should not exist. 

    OK or NG 

    1. OK: GO TO 6.
    2. NG: Repair harness and connector between ABS actuator and electric unit (control unit) and wheel sensor.
  6. CHECK WHEEL SENSOR POWER SUPPLY CIRCUIT 
    1. Connect malfunctioning wheel sensor connector E46 (FR-LH), E33 (FR-RH) or B69 (RR) and ABS actuator and electric unit (control unit) connector.
    2. Turn ignition switch ON and check voltage between malfunctioning wheel sensor harness connector power terminal and ground.
    Fig 3: Checking Wheel Sensor Power Supply Circuit
    G02368373Courtesy of NISSAN MOTOR CO., U.S.A.
    VOLTAGE SPECIFICATION

    Voltage
    Front RH wheel sensor (Harness connector E33)  1 (W) - Ground  8 V or more 
    Front LH wheel sensor (Harness connector E46)  1 (R) - Ground  8 V or more 
    Rear RH wheel sensor (Harness connector B69)  1 (Y) - Ground  8 V or more 
    Rear LH wheel sensor (Harness connector B69)  3 (L) - Ground  8 V or more 

OK or NG 

  1. OK: Replace wheel sensor.
  2. NG: Replace ABS actuator and electric unit (control unit).
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