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Home >> Nissan-Datsun >> 2008 >> Rogue SL, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (MEXICO) >> Component Diagnosis [For MEXICO] >> P1572 ASCD Brake Switch >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK OVERALL FUNCTION-I

    With CONSULT-III 

    1. Turn ignition switch ON.
    2. Select "BRAKE SW1" in "DATA MONITOR" mode with CONSULT-III.
    3. Check "BRAKE SW1" indication under the following conditions.
    MONITOR ITEM CONDITION

    Monitor item Condition Indication
    BRAKE SW1 Brake pedal Slightly depressed OFF
    Fully released ON

    Without CONSULT-III 

    1. Turn ignition switch ON.
    2. Check the voltage between ECM harness connector and ground.
      TERMINALS VOLTAGE REFERENCE

      ECM Ground Condition Voltage
      Connector Terminal
      E16 110 (ASCD brake switch signal) Ground Brake pedal Slightly depressed Approx. 0V
      Fully released Battery voltage

    Is the inspection result normal?

    YES: GO TO 2.

    NO: GO TO  3.

  2. CHECK OVERALL FUNCTION-II

    With CONSULT-III 

    Select "BRAKE SW2" and check indication in "DATA MONITOR" mode.

    MONITOR ITEM CONDITION

    Monitor item Condition Indication
    BRAKE SW2 Brake pedal Slightly depressed ON
    Fully released OFF

    Without CONSULT-III 

    Check the voltage between ECM harness connector and ground.

    TERMINALS VOLTAGE REFERENCE

    ECM Ground Condition Voltage
    Connector Terminal
    E16 106 (Stop lamp switch signal) Ground Brake pedal Slightly depressed Battery voltage
    Fully released Approx. 0V

    Is the inspection result normal?

    YES: GO TO  11.

    NO: GO TO  7.

  3. CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect ASCD brake switch harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between ASCD brake switch harness connector and ground.
      TERMINALS VOLTAGE REFERENCE

      ASCD brake switch Ground Voltage
      Connector Terminal
      E112 1 Ground Battery voltage

    Is the inspection result normal?

    YES: GO TO  5.

    NO: GO TO 4.

  4. DETECT MALFUNCTIONING PART

    Check the following.

    • Junction block connector E105, M77
    • 10A fuse (No.1)
    • Harness for open or short between ASCD brake switch and fuse

      Repair open circuit or short to ground or short to power in harness or connectors.

  5. CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between ASCD brake switch harness connector and ECM harness connector.
      TERMINALS CONTINUITY REFERENCE

      ASCD brake switch ECM Continuity
      Connector Terminal Connector Terminal
      E112 2 E16 110 Existed
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES: GO TO 6.

    NO: Repair open circuit or short to ground or short to power in harness or connectors.

  6. CHECK ASCD BRAKE SWITCH

    Refer to "COMPONENT INSPECTION (ASCD BRAKE SWITCH) ".

    Is the inspection result normal?

    YES: GO TO  11.

    NO: Replace ASCD brake switch.

  7. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect stop lamp switch harness connector.
    3. Check the voltage between stop lamp switch harness connector and ground.
      TERMINALS VOLTAGE REFERENCE

      Stop lamp switch Ground Voltage
      Connector Terminal
      E115 1 Ground Battery voltage

    Is the inspection result normal?

    YES: GO TO  9.

    NO: GO TO 8.

  8. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E105, M77
    • 10A fuse (No.11)
    • Harness for open or short between stop lamp switch and battery

      Repair open circuit or short to ground or short to power in harness or connectors.

  9. CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Disconnect ECM harness connector.
    2. Check the continuity between ECM harness connector and stop lamp switch harness connector.
      TERMINALS CONTINUITY REFERENCE

      ECM Stop lamp switch Continuity
      Connector Terminal Connector Terminal
      E16 106 E115 2 Existed
    3. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES: GO TO 10.

    NO: Repair open circuit or short to ground or short to power in harness or connectors.

  10. CHECK STOP LAMP SWITCH

    Refer to "COMPONENT INSPECTION (STOP LAMP SWITCH) ".

    Is the inspection result normal?

    YES: GO TO 11.

    NO: Replace stop lamp switch.

  11. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END

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