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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 867 (Anti-Lock Brake System & Traction Control System - Abs/TCS) >> Trouble Diagnosis For Self-Diagnostic Items >> Motor Relay or Motor >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

With CONSULT-II: Malfunction code No. C1111 

Without CONSULT-II: Malfunction code No. 61 

  1. INSPECTION START 

    ABS motor relay inspection.

    Fig 1: Inspecting ABS Motor Relay
    G02161683Courtesy of NISSAN MOTOR CO., U.S.A.
    1. : GO TO 2.
  2. CHECK MOTOR POWER SUPPLY CIRCUIT 

    Check 30A [g  ] fusible link (ABS MTR) for ABS motor relay. For fusible link layout, refer to "POWER SUPPLY ROUTING CIRCUIT ".

    Is fusible link OK? 

    1. Yes: GO TO 3.
    2. No: GO TO  7.
  3. CHECK CONNECTOR 
    1. Disconnect ABS actuator and electric unit (control unit) connector. Check terminals for damage or loose connection. Then reconnect connectors.
    2. Carry out self-diagnosis again.

      Does warning lamp activate again? 

      1. Yes: GO TO 4.
      2. No: INSPECTION END. 
  4. CHECK MOTOR RELAY POWER SUPPLY CIRCUIT 
    1. Disconnect ABS actuator and electric unit (control unit) connector.
    2. Check voltage between ABS actuator and electric unit (control unit) connector terminal 17 and ground.

      Does battery voltage exist? 

      1. Yes: GO TO 5.
      2. No: Check the following.
        • Harness connector E125
        • Harness for open or short between ABS actuator and electric unit (control unit) and fusible link. If NG, repair harness or connectors.
      Fig 2: Checking Voltage Between ABS Actuator And Electric Unit Connector Terminal 17 And Ground
      G02161684Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT 

    Refer to "ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND ".

    Is ground circuit OK? 

    1. Yes: Replace ABS actuator and electric unit (control unit).
    2. No: Check the following.
      • Harness connector E125
      • Harness for open or short between ABS actuator and electric unit (control unit) and ground If NG, repair harness or connectors.
  6. REPLACE FUSIBLE LINK 

    Replace fusible link.

    Does the fusible link blow out when ignition switch is turned ON? 

    1. Yes: GO TO 7.
    2. No: INSPECTION END. 
  7. CHECK ABS ACTUATOR MOTOR POWER SUPPLY CIRCUIT 
    1. Disconnect battery cable and ABS actuator and electric unit (control unit) connector.
    2. Check continuity between ABS actuator and electric unit (control unit) connector terminal 17 and ground.

      Does continuity exist? 

      1. Yes: Check the following.
        • Harness connector E125
        • Harness for open or short between ABS actuator and electric unit (control unit) and fusible link If NG, repair harness or connectors.
      2. No: Check ABS actuator and electric unit (control unit) pin terminals for damage or the connection of ABS actuator and electric unit (control unit) harness connector.

        Reconnect ABS actuator and electric unit (control unit) harness connector. Then retest.

      Fig 3: Checking Continuity Between ABS Actuator And Electric Unit Connector Terminal 17 And Ground
      G02161685Courtesy of NISSAN MOTOR CO., U.S.A.
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