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Home >> Infiniti >> 2005 >> G35 Base, 2D Coupe, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control System - Coupe >> ASCD Brake Switch >> Diagnostic Procedure >> M/T Models
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M/T Models

  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.
      BRAKE SW1 CONDITION - INDICATION

      CONDITION INDICATION
      Brake pedal and/or clutch pedal: Slightly depressed OFF
      Brake pedal and clutch pedal: Fully released ON
      Fig 1: CONSULT-II Display - BRAKE SW 2
      G02334221Courtesy of NISSAN MOTOR CO., U.S.A.

    Without CONSULT-II 

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

      CONDITION VOLTAGE
      Brake pedal and/or clutch pedal: Slightly depressed Approximately 0V
      Brake pedal and clutch pedal: Fully released Battery voltage

    OK or NG 

    1. OK: GO TO  2.
    2. NG: GO TO  3
    Fig 2: Checking Voltage Between ECM Terminal 108 & Ground
    G02334222Courtesy of NISSAN MOTOR CO., U.S.A.
  2. CHECK OVERALL FUNCTION-II 

    With CONSULT-II 

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

    BRAKE SW2 CONDITION - INDICATION

    CONDITION INDICATION
    Brake pedal: Fully released OFF
    Brake pedal: Slightly depressed ON
    Fig 3: CONSULT-II Display - BRAKE SW2
    G02334223Courtesy of NISSAN MOTOR CO., U.S.A.

    Without CONSULT-II 

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

    BRAKE PEDAL CONDITION - VOLTAGE

    CONDITION VOLTAGE
    Brake pedal: Fully released Approximately 0V
    Brake pedal: Slightly depressed Battery voltage

    OK or NG 

    1. OK: INSPECTION END 
    2. NG: GO TO  11.
    Fig 4: Checking Voltage Between ECM Terminal 101 & Ground
    G02334224Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK ASCD BRAKE SWITCH CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ASCD clutch switch harness connector.
    3. Turn ignition switch ON.
      Fig 5: Locating ASCD Clutch Switch Harness Connector
      G02334225Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Check voltage between ASCD clutch switch terminal 1 and ground under the following conditions with CONSULT-II or tester.
      BRAKE PEDAL CONDITION - INDICATION

      CONDITION VOLTAGE
      Brake pedal: Fully released Battery voltage
      Brake pedal: Slightly depressed Approximately 0V

    OK or NG 

    1. OK: GO TO  8
    2. NG: GO TO  4.
    Fig 6: Checking Voltage Between ASCD Clutch Switch Terminal 1 & Ground
    G02334226Courtesy of NISSAN MOTOR CO., U.S.A.
  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: Locating ASCD Brake Switch Harness Connector
      G02334227Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Check voltage between ASCD brake switch terminal 1 and ground with CONSULT-II or tester.
      1. Voltage: Battery voltage 

    OK or NG 

    1. OK: GO TO  6
    2. NG: GO TO  5.
    Fig 8: Checking Voltage Between ASCD Brake Switch Terminal 1 & Ground
    G02334228Courtesy of NISSAN MOTOR CO., U.S.A.
  5. DETECT MALFUNCTIONING PART 

    Check the following.

    • Fuse block (J/B) connector E101
    • 10A fuse
    • Harness for open or short between ASCD brake switch and fuse
      1. Repair open circuit or short to ground or short to power 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.
      1. Continuity should exist. 
    3. Also check harness for short to ground and short to power.

    OK or NG 

    1. OK: GO TO  7.
    2. 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 

    1. OK: GO TO  16.
    2. NG: Replace ASCD brake switch.
  8. CHECK ASCD CLUTCH SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check harness continuity between ASCD clutch switch terminal 2 and ECM terminal 108. Refer to Wiring Diagram.
      1. Continuity should exist. 
    4. Also check harness for short to ground and short to power.

    OK or NG 

    1. OK: GO TO  10.
    2. NG: GO TO  9.
  9. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E10, F1
    • Harness for open or short between ECM and ASCD clutch switch
      1. Repair open circuit or short to ground or short to power in harness or connectors.
  10. CHECK ASCD CLUTCH SWITCH 

    Refer to Component Inspection .

    OK or NG 

    1. OK: GO TO  16.
    2. NG: Replace ASCD clutch switch.
  11. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect stop lamp switch harness connector.
      Fig 9: Locating Stop Lamp Switch Harness Connector
      G02334229Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Check voltage between stop lamp switch terminal 3 and ground with CONSULT-II or tester.
      1. Voltage: Battery voltage 

    OK or NG 

    1. OK: GO TO  13.
    2. NG: GO TO  12.
    Fig 10: Checking Stop Lamp Switch Power Supply Circuit
    G02334230Courtesy of NISSAN MOTOR CO., U.S.A.
  12. DETECT MALFUNCTIONING PART 

    Check the following.

    • Fuse block (J/B) connector E101
    • 10A fuse
    • Harness for open or short between stop lamp switch and fuse
      1. Repair open circuit or short to ground or short to power in harness or connectors.
  13. 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 4. Refer to Wiring Diagram.
      1. Continuity should exist. 
    3. Also check harness for short to ground and short to power.

    OK or NG 

    1. OK: GO TO  15.
    2. NG: GO TO  14.
  14. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E108, M15
    • Harness connectors M72, F102
    • Harness for open or short between ECM and stop lamp switch
      1. Repair open circuit or short to ground or short to power in harness or connectors.
  15. CHECK STOP LAMP SWITCH 

    Refer to Component Inspection 

    OK or NG 

    1. OK: GO TO  16.
    2. NG: Replace stop lamp switch.
  16. CHECK INTERMITTENT INCIDENT 

    Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

    1. INSPECTION END 
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