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Home >> Infiniti >> 2006 >> Q45 >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control System >> VDC/TCS/Abs >> Trouble Diagnosis For System >> Wheel Sensor >> Inspection Procedure
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Inspection Procedure

  1. CHECK SELF-DIAGNOSTIC RESULTS 

    With CONSULT-II 

    • Turn ignition switch "ON". (Do not start engine.)
    • Select "SELF-DIAG RESULTS" mode for "VDC" with CONSULT-II.
    • Touch "ERASE".
    • Turn ignition switch "OFF" and wait at least 10 seconds.
    • Check the self-diagnostic results.
      SELF-DIAGNOSTIC RESULTS

      Self-diagnosis results
      FR RH SENSOR -1, -2
      FR LH SENSOR -1, -2
      RR RH SENSOR -1, -2
      RR LH SENSOR -1, -2

    Is above displayed in the self-diagnosis display? 

    1. YES : GO TO 2.
    2. NO : INSPECTION END
  2. CHECK TIRE 

    Check air pressure, wear and size.

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

    1. YES : GO TO 3.
    2. NO : Adjust air pressure, or replace tire.
  3. CHECK SENSOR AND SENSOR ROTOR 
    • Check the condition of the sensor mount (for looseness, etc.).
    • Check the surface of front sensor rotor for damage.
    • Check rear sensor rotor for damage.

    OK or NG 

    1. OK : GO TO 4.
    2. NG : Repair sensor mount or replace sensor rotor. Refer to "SENSOR ROTOR ".
  4. CHECK CONNECTOR 
    • Turn ignition switch "OFF".
    • Disconnect VDC/TCS/ABS control unit connector E218 and malfunctioning wheel sensor connector E20 (FR-RH), E70 (FR-LH), B35 (RR-RH, RR-LH). Check terminal to see if it is deformed, disconnected, loose, etc., Repair or replace it if any malfunction condition is found.
    • Reconnect connectors and then perform the self-diagnosis. Refer to "SELF-DIAG RESULT MODE ".

    OK or NG 

    1. OK : INSPECTION END
    2. NG : GO TO 5.
  5. CHECK WHEEL SENSOR HARNESS 
    1. Turn ignition switch "OFF".
    2. Disconnect malfunctioning wheel sensor connector E20 (FR-RH), E70 (FR-LH), B35 (RR-RH, RR-LH) and VDC/TCS/ABS control unit harness connector E218.
    3. 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 Continuity Between Wheel Sensor
      G04128963Courtesy of NISSAN MOTOR CO., U.S.A.
      POWER CIRCUIT AND GROUND CIRCUIT REFERENCE

        Power circuit Signal circuit Ground circuit
      Wheel VDC/TCS/ABS control unit harness connector Wheel sensor harness connector VDC/TCS/ABS control unit harness connector Wheel sensor harness connector VDC/TCS/ABS control unit harness connector Ground
      Front RH 15 1 16 2 15, 16 -
      Front LH 8 1 10 2 8, 10
      Rear RH 11 1 12 2 11, 12
      Rear LH 13 3 14 4 13, 14

      Power circuit : Continuity should exist. 

      Signal circuit : Continuity should exist. 

      Ground circuit : Continuity should not exist. 

    OK or NG 

    1. OK : GO TO 6.
    2. NG : Repair harness and connector between VDC/TCS/ABS control unit and wheel sensor.
  6. CHECK WHEEL SENSOR 
    1. Check resistance value of malfunctioning wheel sensor.
      WHEEL SENSOR RESISTANCE TABLE

      Residence value
      Front RH wheel sensor 1 - 2 0.8-1.85 kΩ
      Front LH wheel sensor 1 - 2
      Rear RH wheel sensor 1 - 2
      Rear LH wheel sensor 3 - 4
      Fig 2: Checking Resistance Between Wheel Sensor
      G04128964Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK : Replace VDC/TCS/ABS control unit.
    2. NG : Replace wheel sensor.
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