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Home >> Infiniti >> 2010 >> M45 Base >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control System >> Service Information >> Trouble Diagnosis For System >> Pressure Sensor Circuit >> Inspection Procedure
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Inspection Procedure

  1. CHECK SELF-DIAGNOSTIC RESULTS 

    Check self-diagnosis results.

    SELF-DIAGNOSIS RESULTS REFERENCE

    Self-diagnosis results
    PRESS SEN CIRCUIT

    Is above displayed on the self-diagnosis display? 

    YES: GO TO  2.

    NO: INSPECTION END

  2. CHECK STOP LAMP SWITCH CONNECTOR 
    1. Disconnect stop lamp switch connector and ABS actuator and electric unit (control unit) connector.
    2. Check terminals for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal.
    3. Reconnect connectors securely.
    4. Start engine.
    5. Repeat pumping brake pedal carefully several times, then perform the self-diagnosis again.

      OK or NG 

      OK: Connector terminal contact is loose, damaged, open or shorted.

      NG: GO TO  3.

  3. CHECK STOP LAMP SWITCH 
    1. Turn ignition switch OFF.
    2. Disconnect stop lamp switch harness connector E124.
    3. Operate stop lamp switch and check continuity between stop lamp switch harness connector terminals.
      CONTINUITY TABLE

      Terminal Condition Continuity
      1 - 2 (Without ICC models)
      3 - 4 (With ICC models)
      Release stop lamp switch (When brake pedal is depressed.) Yes
      Push stop lamp switch (When brake pedal is released.) No

      OK or NG 

      OK: GO TO  4.

      NG: Replace stop lamp switch. Refer to REMOVAL AND INSTALLATION .

  4. CHECK STOP LAMP SWITCH CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect stop lamp switch connector E124 and ABS actuator and electric unit (control unit) connector E30.
    3. Check continuity between stop lamp switch harness connector and ABS actuator and electric unit (control unit) harness connector.
      CONTINUITY TABLE

      ABS actuator and electric unit (control unit) Stop lamp switch Continuity
      30 2 (Without ICC models)
      4 (With ICC models)
      Yes

      OK or NG 

      OK: GO TO  5.

      NG: Open or short in harness between stop lamp switch and ABS actuator and electric unit (control unit). Repair or replace applied harness.

  5. CHECK PRESSURE SENSOR 
    1. Connect ABS actuator and electric unit (control unit) connector.
    2. Perform "DATA MONITOR" of the "PRESS SENSOR" to check if the status is normal.
      DATA MONITOR DISPLAY TABLE

      Condition Data monitor display
      When brake pedal is depressed. -40 to 300 bar
      When brake pedal is released. Approx. 0 bar

      OK or NG 

      OK: INSPECTION END

      NG: If the pressure sensor is damaged or malfunctioning, replace the ABS actuator and electric unit (control unit).