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Home >> Nissan-Datsun >> 2012 >> Cube Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Component Testing (CALIFORNIA) >> ASCD Brake Switch >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT-I
    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.
      ASCD brake switch Ground Voltage
      Connector Terminal
      E112 1 Ground Battery voltage

      Is the inspection result normal? 

      YES >> GO TO  7.

      NO-1 >> CVT models: GO TO 2.

      NO-2 >> M/T models: GO TO  3.

  2. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E105, M77
    • 10 A fuse (No. 2)
    • 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.

  3. CHECK ASCD CLUTCH SWITCH POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect ASCD clutch switch harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between ASCD clutch switch harness connector and ground.
      ASCD clutch switch Ground Voltage
      Connector Terminal
      E111 3 Ground Battery voltage

      Is the inspection result normal? 

      YES >> GO TO  5.

      NO >> GO TO 4.

  4. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E105, M77
    • 10 A fuse (No. 2)
    • Harness for open or short between ASCD clutch switch and fuse

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

  5. CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT-II
    1. Turn ignition switch OFF.
    2. Disconnect ASCD brake switch harness connector.
    3. Check the continuity between ASCD clutch switch harness connector and ASCD brake switch harness connector.
      ASCD clutch switch ASCD brake switch Continuity
      Connector Terminal Connector Terminal
      E111 4 E112 1 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 CLUTCH SWITCH

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

    Is the inspection result normal? 

    YES >> GO TO  9.

    NO >> Replace ASCD clutch switch. Refer to "EXPLODED VIEW ".

  7. 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.
      ASCD brake switch ECM Continuity
      Connector Terminal Connector Terminal
      E112 2 E16 100 Existed
    4. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES >> GO TO 8.

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

  8. CHECK ASCD BRAKE SWITCH

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

    Is the inspection result normal? 

    YES >> GO TO 9.

    NO >> Replace ASCD brake switch. Refer to "EXPLODED VIEW ".

  9. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    >> INSPECTION END

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