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Home >> Nissan-Datsun >> 2004 >> 350Z 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> System >> 2004 - Engine Control System - Component Testing - Early Roadster >> 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.
      CONDITIONS

      CONDITION INDICATION
      When brake pedal and/or clutch pedal are depressed OFF
      When brake pedal and clutch pedal are fully released ON
      Fig 1: CONSULT-II Display - DATA MONITOR
      G03353187Courtesy 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.
      VOLTAGE SPECIFICATIONS

      CONDITION VOLTAGE
      When brake pedal and/or clutch pedal are depressed Approximately 0V
      When brake pedal and clutch pedal are fully released Battery voltage
      Fig 2: Checking Voltage Between ECM Terminal 108 And Ground
      G03353188Courtesy of NISSAN MOTOR CO., U.S.A.

      OK or NG

      1. OK : GO TO 2.
      2. NG : GO TO  4.
    3. CHECK OVERALL FUNCTION-II 

      With CONSULT-II 

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

      CONDITION

      CONDITION INDICATION
      When brake pedal is released OFF
      When brake pedal is depressed ON
      Fig 3: CONSULT-II Display - DATA MONITOR
      G03353189Courtesy of NISSAN MOTOR CO., U.S.A.

      Without CONSULT-II 

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

      VOLTAGE SPECIFICATIONS

      CONDITION VOLTAGE
      When brake pedal is released Approximately 0V
      When brake pedal is depressed Battery voltage
      Fig 4: Checking Voltage Between ECM Terminal 101 And Ground
      G03353190Courtesy of NISSAN MOTOR CO., U.S.A.

      OK or NG

      1. OK : INSPECTION END 
      2. NG : GO TO  9.
    4. CHECK ASCD BRAKE SWITCH CIRCUIT 
      1. Turn ignition switch OFF.
      2. Disconnect ASCD clutch switch harness connector.
      3. Turn ignition switch ON.
        Fig 5: Disconnecting ASCD Clutch Switch Harness Connector
        G03353191Courtesy of NISSAN MOTOR CO., U.S.A.
      4. Check voltage between ASCD clutch switch terminal 1 and ground with CONSULT-II or tester.

      Voltage: Battery voltage 

      Fig 6: Checking Voltage Between ASCD Clutch Switch Terminal 1 And Ground
      G03353192Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK : GO TO  6.
    2. NG : GO TO 4.
  2. 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: Disconnecting ASCD Brake Switch Harness Connector
      G03353193Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Check voltage between ASCD brake switch terminal 1 and ground with CONSULT-II or tester.

      Voltage: Battery voltage 

      Fig 8: Checking Voltage Between ASCD Brake Switch Terminal 1 And Ground
      G03353194Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK : GO TO  4.
    2. NG : GO TO 5.
  3. 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.
  4. 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.

      WIRING DIAGRAM .

      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.
  5. CHECK ASCD BRAKE SWITCH 

    Refer to "COMPONENT INSPECTION "

    OK or NG

    1. OK : GO TO  14.
    2. NG : Replace ASCD brake switch.
  6. 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.

      WIRING DIAGRAM .

      Continuity should exist  .

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

    OK or NG

    1. OK : GO TO  8.
    2. NG : GO TO 9.
  7. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E108, M15
    • Harness connectors M72, F102
    • 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.
  8. CHECK ASCD CLUTCH SWITCH 

    Refer to CLUTCH PEDAL .

    OK or NG

    1. OK : GO TO  14.
    2. NG : Replace ASCD clutch switch.
  9. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect stop lamp switch harness connector.
      Fig 9: Disconnecting Stop Lamp Switch Harness Connector
      G03353195Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-II or tester.

      Voltage: Battery voltage 

      Fig 10: Checking Voltage Between Stop Lamp Switch Terminal 1 And Ground
      G03353196Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK : GO TO  11.
    2. NG : GO TO 12.
  10. 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.
  11. 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.

      WIRING DIAGRAM .

      Continuity should exist  .

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

    OK or NG

    1. OK : GO TO  13.
    2. NG : GO TO 14.
  12. 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.
  13. CHECK STOP LAMP SWITCH 

    Refer to "COMPONENT INSPECTION "

    OK or NG

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

    Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

    1. : INSPECTION END 
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