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Home >> Infiniti >> 2008 >> G37 Sport >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control System >> Component Diagnosis >> DTC C1115: Wheel Sensor >> Diagnosis Procedure

Diagnosis Procedure

CAUTION: Do not check between wheel sensor terminals.
  1. CHECK TIRES

    Check air pressure, wear and size.

    Are air pressure, wear and size within standard? 

    YES: GO TO  2.

    NO: Adjust air pressure, or replace tire.

  2. CHECK SENSOR AND SENSOR ROTOR
    • Check sensor rotor for damage.
    • Check wheel sensor for damage, disconnection or looseness.

    Are the sensor and sensor rotor normal? 

    YES: GO TO  3.

    NO: Repair wheel sensor mount or replace sensor rotor. Then perform the self-diagnosis.

  3. CHECK CONNECTOR
    1. Turn ignition switch OFF.
    2. Disconnect ABS actuator and electric unit (control unit) connector.
    3. Disconnect malfunctioning wheel sensor connector.
    4. Check terminal to see if it is deformed, disconnected, loose, etc., Repair or replace it if any malfunction condition is found.
    5. Reconnect connectors and then perform the self-diagnosis.

    Is any item indicated on the self-diagnosis display? 

    YES: GO TO  4.

    NO: Poor connection of connector terminal. Repair or replace connector.

  4. CHECK WHEEL SENSOR HARNESS
    1. Turn ignition switch OFF.
    2. Disconnect ABS actuator and electric unit (control unit) connector.
    3. Disconnect malfunctioning wheel sensor connector.
    4. Check continuity between terminals. (Also check continuity when steering wheel is turned right and left and when sensor harness inside the wheel house is moved.)

    Measurement terminal for power supply circuit

    CONTINUITY REFERENCE CHART

    ABS actuator and electric unit (control unit) Wheel sensor Continuity
    Connector Terminal Connector Terminal
    E41 9 E27 (Front RH) 1 Existed
    26 E60 (Front LH)
    7 B33 (Rear RH)
    6 B34 (Rear LH)

    Measurement terminal for signal circuit

    CONTINUITY REFERENCE CHART

    ABS actuator and electric unit (control unit) Wheel sensor Continuity
    Connector Terminal Connector Terminal
    E41 10 E27 (Front RH) 2 Existed
    5 E60 (Front LH)
    29 B33 (Rear RH)
    27 B34 (Rear LH)

    Measurement terminal for ground circuit

    CONTINUITY REFERENCE CHART

    ABS actuator and electric unit (control unit) Continuity
    Connector Terminal Connector Terminal
    E41 9, 10 E41 1, 4 Not existed
    26, 5
    7, 29
    6, 27

    Is the inspection result normal? 

    YES: GO TO  5.

    NO: Repair or replace malfunctioning components.

  5. CHECK WHEEL SENSOR POWER SUPPLY CIRCUIT
    1. Disconnect malfunctioning wheel sensor connector.
    2. Turn ignition switch ON.
    3. Check voltage between wheel sensor harness connector power supply terminal and ground.
    VOLTAGE REFERENCE CHART

    Wheel sensor - Voltage
    Connector Terminal
    E27 (Front RH) 1 Ground 8 V or more
    E60 (Front LH)
    B33 (Rear RH)
    B34 (Rear LH)

    Is the inspection result normal? 

    YES: Replace applicable wheel sensor.

    NO: Replace ABS actuator and electric unit (control unit).

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