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Home › Nissan-Datsun › 2002 › Sentra SE-R, Automatic › Repair and Diagnosis › External Pages › Different car › Section 1564 (Brake Control System) › Abs › Trouble Diagnosis For Self-Diagnostic Items › Wheel Sensor System › Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2005 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
  1. CONNECTOR INSPECTION 

    Disconnect the ABS actuator and electric unit (control unit) connector E125 and wheel sensor of malfunctioning code.

    Check the terminals for deformation, disconnection, looseness or damage.

    OK or NG

    1. OK: GO TO  2.
    2. NG: Repair or replace as necessary. REMOVAL AND INSTALLATION .
  2. CHECK WHEEL SENSOR OUTPUT SIGNAL 
    1. Connect ABS active wheel sensor tester (J-45741) to wheel sensor using appropriate adapter.
    2. Turn on the ABS active wheel sensor tester power switch.
      NOTE: The green POWER indicator should illuminate. If the POWER indicator does not illuminate, replace the battery in the ABS active wheel sensor tester before proceeding.
    3. Spin the wheel of the vehicle by hand and observe the red SENSOR indicator on the ABS active wheel sensor tester. The red SENSOR indicator should flash on and off to indicate an output signal.
      NOTE: If the red SENSOR indicator illuminates but does not flash, reverse the polarity of the tester leads and retest.

    Does the ABS active wheel sensor tester detect a signal?

    1. YES: GO TO  3.
    2. NO: Replace the wheel sensor. Refer to REMOVAL AND INSTALLATION .
  3. CHECK TIRES 

    Check for inflation pressure, wear and size of each tire.

    Are tire pressure and size correct and is tire wear within specifications?

    1. YES: GO TO  4.
    2. NO: Adjust tire pressure or replace tire(s).
  4. CHECK WHEEL BEARINGS 

    Check wheel bearing axial end play. Refer to WHEEL BEARING INSPECTION or WHEEL BEARING INSPECTION .

    OK or NG

    1. OK: GO TO  5.
    2. NG: Repair or replace as necessary. Refer to REMOVAL AND INSTALLATION or REMOVAL AND INSTALLATION .
  5. CHECK WIRING HARNESS FOR SHORT CIRCUIT 
    1. Disconnect ABS actuator and electric unit (control unit) connector and wheel sensor connector of malfunction code No.
    2. Check resistance between wheel sensor harness connector terminals and ground.

      Continuity should not exist  .

    OK or NG

    1. OK: GO TO  6.
    2. NG: Repair the circuit.
      Fig 1: Checking Resistance Between Wheel Sensor Harness Connector Terminals & Ground
      G03599600Courtesy of NISSAN MOTOR CO., U.S.A.
  6. CHECK WIRING HARNESS FOR OPEN CIRCUIT 

    Check continuity between ABS actuator and electric unit (control unit) harness connector and wheel sensor harness connector.

    CONTINUITY BETWEEN ABS ACTUATOR CHART

    Wheel sensor ABS actuator and electric unit (control unit) Wheel sensor Continuity
    Connector - terminal Wire color Connector - terminal Wire color
    Front LH E125 - 45 G/O E18 - 1 G/O Yes
    E125 - 46 BR/W E18 - 2 BR/W
    Front RH E125 - 34 B/R E117 - 1 B/R
    E125 - 33 BR E117 - 2 BR
    Rear LH E125 - 37 P C11 - 2 P
    E125 - 36 L C11 - 1 L
    Rear RH E125 - 42 V C10 - 2 V
    E125 - 43 G/Y C10 - 1 G/Y

    Continuity should exist  .

    OK or NG

    1. OK: Replace the ABS actuator and electric unit (control unit). Refer to REMOVAL AND INSTALLATION .
    2. NG: Repair the circuit.
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