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Home >> Nissan-Datsun >> 2007 >> Frontier XE, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Control System - Component Testing (VQ)) >> ASCD Brake Switch >> Diagnostic Procedure >> M/T Models
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M/T Models

WARNING: This page is about a different variant/trim than selected.
  1. CHECK OVERALL FUNCTION-I 

    With CONSULT-II 

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

      CONDITION INDICATION
      Clutch pedal and/or brake pedal: Slightly depressed OFF
      Clutch pedal and brake pedal: Fully released ON
      Fig 1: CONSULT-II Display - DATA MONITOR
      G04900669Courtesy of NISSAN NORTH AMERICA, INC.

    Without CONSULT-II 

    1. Turn ignition switch ON.
    2. Check voltage between ECM terminal 108 and ground under the following conditions.
      VOLTAGE CONDITION CHART

      CONDITION VOLTAGE
      Clutch pedal and/or brake pedal: Slightly depressed Approximately 0V
      Clutch pedal and brake pedal: Fully released Battery voltage
      Fig 2: Checking Voltage Between ECM Terminal 108 (ASCD Brake Switch Signal) And Ground
      G04900670Courtesy of NISSAN NORTH AMERICA, INC.

    OK or NG 

    OK: GO TO 2.

    NG: GO TO  3.

  2. CHECK OVERALL FUNCTION-II 

    With CONSULT-II 

    Check "BRAKE SW2" indication in "DATA MONITOR" mode.

    CONDITION INDICATION CHART

    CONDITION INDICATION
    Brake pedal: Fully released OFF
    Brake pedal: Slightly depressed ON
    Fig 3: CONSULT-II Display - DATA MONITOR
    G04900671Courtesy of NISSAN NORTH AMERICA, INC.

    Without CONSULT-II 

    Check voltage between ECM terminal 101 and ground under the following conditions.

    VOLTAGE CONDITION CHART

    CONDITION VOLTAGE
    Brake pedal: Fully released Approximately 0V
    Brake pedal: Slightly depressed Battery voltage
    Fig 4: Checking Voltage Between ECM Connector 101 And Ground
    G04895057Courtesy of NISSAN NORTH AMERICA, INC.

    OK or NG 

    OK: INSPECTION END 

    NG: GO TO  10.

  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.
      Fig 5: Identifying ASCD Clutch Switch
      G04895066Courtesy of NISSAN NORTH AMERICA, INC.
    4. Check voltage between ASCD clutch switch terminal 1 and ground with CONSULT-II or tester.

      Voltage: Battery voltage 

    OK or NG 

    OK: GO TO  8.

    NG: GO TO 4.

    Fig 6: Checking Voltage Between ASCD Brake Switch Terminal 1 And Ground
    G04875409Courtesy of NISSAN NORTH AMERICA, INC.
  4. CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ASCD brake switch harness connector.
    3. Turn ignition switch ON.
      Fig 7: Identifying ASCD Brake Switch
      G04895051Courtesy of NISSAN NORTH AMERICA, INC.
    4. Check voltage between ASCD brake switch terminal 1 and ground with CONSULT-II or tester.

      Voltage: Battery voltage 

    OK or NG 

    OK: GO TO  6.

    NG: GO TO 5.

    Fig 8: Checking Voltage Between ASCD Brake Switch Terminal 1 And Ground
    G04875403Courtesy of NISSAN NORTH AMERICA, INC.
  5. DETECT MALFUNCTIONING PART 

    Check the following.

    • Fuse block (J/B) connector E160
    • 10A fuse
    • Harness for open or short between ASCD brake switch and fuse

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

  6. CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Check harness continuity between ASCD brake switch terminal 2 and ASCD clutch switch terminal 1.

      Refer to WIRING DIAGRAM .

      Continuity should exist. 

    3. Also check harness for short to ground and short to power.

    OK or NG 

    OK: GO TO 7.

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

  7. CHECK ASCD BRAKE SWITCH 

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO  14.

    NG: Replace ASCD brake switch.

  8. CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check harness continuity between ECM terminal 108 and ASCD clutch switch terminal 2.

      Refer to WIRING DIAGRAM .

      Continuity should exist. 

    4. Also check harness for short to ground and short to power.

    OK or NG 

    OK: GO TO 9.

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

  9. CHECK ASCD CLUTCH SWITCH 

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO  14.

    NG: Replace ASCD clutch switch.

  10. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect stop lamp switch harness connector.
      Fig 9: Identifying Stop Lamp Switch
      G04895051Courtesy of NISSAN NORTH AMERICA, INC.
    3. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-II or tester.

      Voltage: Battery voltage 

    OK or NG 

    OK: GO TO  12.

    NG: GO TO 11.

    Fig 10: Checking Voltage Between Stop Lamp Switch Terminal 1 And Ground
    G04900676Courtesy of NISSAN NORTH AMERICA, INC.
  11. DETECT MALFUNCTIONING PART 

    Check the following.

    • Fuse block (J/B) connector E160
    • 10A fuse
    • 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.

  12. CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Disconnect ECM harness connector.
    2. Check harness continuity between ECM terminal 101 and stop lamp switch terminal 2.

      Refer to WIRING DIAGRAM .

      Continuity should exist. 

    3. Also check harness for short to ground and short to power.

    OK or NG 

    OK: GO TO 13.

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

  13. CHECK STOP LAMP SWITCH 

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO 14.

    NG: Replace stop lamp switch.

  14. CHECK INTERMITTENT INCIDENT 

    Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

    : INSPECTION END 

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