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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 995 (Brake Control System (VDC/TCS/Abs)) >> Component Diagnosis >> C1142 Press Sen Circuit >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CONNECTOR INSPECTION
    1. Turn ignition switch OFF.
    2. Disconnect ABS actuator and electric unit (control unit) connector and stop lamp switch connector.
    3. Check terminals for deformation, disconnection, looseness and damage. If any malfunction is found, repair or replace terminals.
    4. Reconnect connectors securely.
    5. Start engine.
    6. Pump brake pedal carefully several times, and perform self-diagnosis.

    Is the inspection result normal? 

    YES: GO TO 2

    NO: Poor connection of connector terminal. Repair or replace connector.

  2. CHECK STOP LAMP SWITCH
    1. Turn ignition switch OFF.
    2. Disconnect stop lamp switch connector.
    3. Check continuity between stop lamp switch terminals 3 and 4.
    TERMINAL CONTINUITY REFERENCE

    Stop lamp switch terminals Condition Continuity
    3 - 4 Brake pedal depressed Yes
    Brake pedal released No
    Fig 1: Checking Continuity Between Stop Lamp Switch Terminals 3 And 4
    G05866024Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    YES: GO TO 3

    NO: Replace stop lamp switch.

  3. CHECK STOP LAMP SWITCH CIRCUIT
    1. Disconnect ABS actuator and electric unit (control unit) connector.
    2. Connect stop lamp switch connector.
    3. Check voltage between ABS actuator and electric unit (control unit) connector E26 terminal 20 and ground.
    TERMINAL VOLTAGE REFERENCE

    ABS actuator and electric unit (control unit) Ground Condition Voltage (Approx.)
    Connector Terminal
    E26 20 - Brake pedal depressed Battery voltage
    Brake pedal released 0 V
    Fig 2: Checking Voltage Between ABS Actuator And Electric Unit Connector E26 Terminal 20 And Ground
    G04887271Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    YES: GO TO 4

    NO: Repair or replace malfunctioning components.

  4. CHECK SELF-DIAGNOSIS RESULTS

Check self-diagnosis results.

SELF-DIAGNOSIS RESULTS

Self-diagnosis results
PRESS SEN CIRCUIT

Is above displayed on the self-diagnosis display? 

YES: Replace ABS actuator and electric unit (control unit). Refer to "REMOVAL AND INSTALLATION ".

NO: Inspection End.