2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

M/T Models

WARNING: This page is about a different car, the 2005 Nissan 350Z. However, it is still accessible from the selected car via links, so may be relevant.
  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.
      Fig 1: Scan Tool Display "Data Monitor"
      G02402224Courtesy of NISSAN MOTOR CO., U.S.A.
      DISPLAY INDICATION

      CONDITION INDICATION
      Brake pedal and/or clutch pedal: Slightly depressed OFF
      Brake pedal and clutch pedal: Fully released ON

    Without CONSULT-II 

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

      CONDITION VOLTAGE
      Brake pedal and/or clutch pedal: Slightly depressed Approximately 0V
      Brake pedal and clutch pedal: Fully released Battery voltage
      Fig 2: ECM Connector Terminal 108 & Ground Voltage Test
      G02402225Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

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

    With CONSULT-II 

    1. Select "BRAKE SW2" in "DATA MONITOR" mode with CONSULT-II.
    2. Check "BRAKE SW2" indication under the following conditions.
      DISPLAY INDICATION

      CONDITION INDICATION
      Brake pedal:Fully released OFF
      Brake pedal: Slightly depressed ON
      Fig 3: Scan Tool Display "Data Monitor"
      G02402226Courtesy of NISSAN MOTOR CO., U.S.A.

    Without CONSULT-II 

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

    VOLTAGE SPECIFICATION

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

    OK or NG

    • OK: INSPECTION END 
    • NG: GO TO  11.
    Fig 4: ECM Connector Terminal 101 & Ground Voltage Test
    G02402227Courtesy 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: ASCD Clutch Switch Harness Connector
      G02402228Courtesy 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 

    OK or NG

    • OK: GO TO  8.
    • NG: GO TO 4.
    Fig 6: ASCD Clutch Switch Terminal 1 & Ground Voltage Test
    G02402229Courtesy 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: ASCD Brake Switch Harness Connector
      G02402230Courtesy 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 

    OK or NG

    • OK: GO TO  6.
    • NG: GO TO 5.
    Fig 8: ASCD Brake Switch Connector Terminal 1 & Ground Voltage Test
    G02402231Courtesy 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
      • : 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 .
      • 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  16.
    • 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 .
      • Continuity should exist. 
    4. Also check harness for short to ground and short to power.

    OK or NG

    • OK: GO TO  10.
    • NG: GO TO 9.
  9. 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
      • : 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

    • OK: GO TO  16.
    • NG: Replace ASCD clutch switch.
  11. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT 
    1. Disconnect stop lamp switch harness connector.
      Fig 9: Stop Lamp Switch Harness Connector
      G02402232Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-II or tester.
      • Voltage: Battery voltage 

    OK or NG

    • OK: GO TO  13.
    • NG: GO TO 12.
    Fig 10: Stop Lamp Switch Connector Terminal 1 & Ground Voltage Test
    G02402233Courtesy 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
      • : 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 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  15.
    • 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
      • : 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

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

    Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

    • : INSPECTION END 
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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