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Home >> Nissan-Datsun >> 2005 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Introduction (Qr25DE) >> Basic Service Procedure >> Idle Air Volume Learning >> Operation Procedure
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Operation Procedure

With CONSULT-II 

  1. Perform "ACCELERATOR PEDAL RELEASED POSITION LEARNING ".
  2. Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".
  3. Start engine and warm it up to normal operating temperature.
  4. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.
  5. Select "IDLE AIR VOL LEARN" in "WORK SUPPORT" mode.
    Fig 1: IDLE AIR VOL LEARN In WORK SUPPORT Mode - CONSULT-II Screen Display
    G02450705Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Touch "START" and wait 20 seconds.
    Fig 2: START In WORK SUPPORT Mode - CONSULT-II Screen Display
    G02450706Courtesy of NISSAN MOTOR CO., U.S.A.
  7. Make sure that "CMPLT" is displayed on CONSULT-II screen. If "CMPLT" is not displayed, Idle Air Volume Learning will not be carried out successfully. In this case, find the cause of the incident by referring to the DIAGNOSTIC PROCEDURE below.
    Fig 3: CMPLT In WORK SUPPORT Mode - CONSULT-II Screen Display
    G02450707Courtesy of NISSAN MOTOR CO., U.S.A.
  8. Rev up the engine 2 or 3 times and make sure that idle speed and ignition timing are within the specifications. Refer to "IDLE SPEED ".
IDLE SPEED AND IGNITION TIMING SPECIFICATIONS

ITEM SPECIFICATION
Idle speed M/T: 700 +/- 50 rpm (in Neutral position) A/T: 700 +/- 50 rpm (in P or N position)
M/T: 700 +/- 50 rpm (in Neutral position) A/T: 700 +/- 50 rpm (in P or N position)
Ignition timing M/T: 15 +/- 5° BTDC (in Neutral position) A/T: 15 +/- 5° BTDC (in P or N position)
M/T: 15 +/- 5° BTDC (in Neutral position) A/T: 15 +/- 5° BTDC (in P or N position)

Without CONSULT-II 

NOTE:
  • It is better to count the time accurately with a clock.
  • It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has a malfunction.
  1. Perform "ACCELERATOR PEDAL RELEASED POSITION LEARNING ".
  2. Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".
  3. Start engine and warm it up to normal operating temperature.
  4. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.
  5. Turn ignition switch OFF and wait at least 10 seconds.
  6. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
  7. Repeat the following procedure quickly 5 times within 5 seconds.
    1. Fully depress the accelerator pedal.
    2. Fully release the accelerator pedal.
  8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops blinking and turned ON.
  9. Fully release the accelerator pedal within 3 seconds after the MIL turned ON.
  10. Start engine and let it idle.
  11. Wait 20 seconds.
    Fig 4: Idle Air Volume Learning Chart (Without CONSULT-II)
    G02450708Courtesy of NISSAN MOTOR CO., U.S.A.
  12. Rev up the engine 2 or 3 times and make sure that idle speed and ignition timing are within the specifications. Refer to IDLE SPEED .
    IDLE SPEED AND IGNITION TIMING SPECIFICATIONS

    ITEM SPECIFICATION
    Idle speed M/T: 700 +/- 50 rpm (in Neutral position) A/T: 700 +/- 50 rpm (in P or N position)
    M/T: 700 +/- 50 rpm (in Neutral position) A/T: 700 +/- 50 rpm (in P or N position)
    Ignition timing M/T: 15 +/- 5° BTDC (in Neutral position) A/T: 15 +/- 5° BTDC (in P or N position)
    M/T: 15 +/- 5° BTDC (in Neutral position) A/T: 15 +/- 5° BTDC (in P or N position)
  13. If idle speed and ignition timing are not within the specification, Idle Air Volume Learning will not be carried out successfully. In this case, find the cause of the incident by referring to the Diagnostic Procedure below.
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