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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 1245 (Brake Control System) >> Abs >> Trouble Diagnosis For Self-Diagnostic Items >> Wheel Sensor System Inspection >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2004 Nissan Maxima. 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 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.
  2. CHECK WHEEL SENSOR OUTPUT SIGNAL 
    1. Disconnect connectors from wheel sensor of malfunction code No.
    2. Connect ABS active wheel sensor tester (J-45741) to wheel sensor using appropriate adapter.
    3. 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.
    4. 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 >> GO TO  6.
  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 FRONT WHEEL HUB & BEARING ASSEMBLY or REAR WHEEL HUB & BEARING ASSEMBLY .

    OK or NG

    1. OK >> GO TO 5.
    2. NG >> Repair as necessary. Refer to FRONT WHEEL HUB & BEARING ASSEMBLY or REAR WHEEL HUB & BEARING ASSEMBLY .
  5. CHECK SENSOR ROTORS 

    Check sensor rotors for teeth damage.

    OK or NG

    1. OK >> GO TO 6.
    2. NG >> Replace sensor rotor. Refer to SENSOR ROTOR .
  6. 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 harness connector terminal and ground.
      1. Continuity should not exist. 

    OK or NG

    1. OK >> GO TO 7.
    2. NG >> Repair the circuit.
    Fig 1: Checking Wiring Harness For Short Circuit
    G00341462Courtesy of NISSAN MOTOR CO., U.S.A.
  7. CHECK WIRING HARNESS FOR OPEN CIRCUIT 
    1. Disconnect ABS actuator and electric unit (control unit) connector and wheel sensor connector of malfunction code No.
    2. Check continuity between both wiring harness ends.
      Fig 2: Checking Wiring Harness For Open Circuit
      G00341463Courtesy of NISSAN MOTOR CO., U.S.A.
      • 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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