2005 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

Malfunction code No. 71

  1. INSPECTION START 

    ABS actuator and electric unit power supply and ground circuit inspection

    Fig 1: ABS Actuator & Electric Unit Power Supply Diagram
    G02456748Courtesy of NISSAN MOTOR CO., U.S.A.
    • GO TO  2.
  2. CHECK CONNECTOR 
    1. Disconnect ABS actuator and electric unit connector.

      Check terminals for damage or loose connection. Then reconnect connector.

    2. Carry out self-diagnosis again.

    Does warning lamp activate again? 

    • Yes: GO TO  3.
    • No: Inspection End.
  3. CHECK ABS ACTUATOR AND ELECTRIC UNIT POWER SUPPLY CIRCUIT 

    Check voltage. Refer to DIAGNOSTIC PROCEDURE .

    Does battery voltage exist when ignition switch is turned ON? 

    • Yes: GO TO  4.
    • No: Check harness for open or short between ABS actuator and electric unit and fuse.
  4. SELF-DIAGNOSIS RESULT CHECK 

    Check the self-diagnosis results.

    Is code No. 71 indicated again? 

    • Yes: Replace ABS actuator and electric unit. Refer to ACTUATOR .
    • No: Inspect the system according to the code No.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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