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Home >> Nissan-Datsun >> 2009 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Introduction (Qr25DE) >> Service Information >> Basic Service Procedure >> Idle Air Volume Learning >> Operation Procedure
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Operation Procedure

With CONSULT-III

  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.
  6. Touch "START" and wait 20 seconds.
  7. Check that "CMPLT" is displayed on CONSULT-III 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.
  8. Rev up the engine two or three times and check that idle speed and ignition timing are within the specifications.

    Refer to "BASIC INSPECTION ".

    SPECIFICATION CHART

    ITEM SPECIFICATION
    Idle speed M/T: 800 ± 50 RPM (in Neutral position)
    CVT: 650 ± 50 RPM (in P or N position)
    Ignition timing M/T:10 ± 5° BTDC (in Neutral position)
    CVT: 10 ± 5° BTDC (in P or N position)

Without CONSULT-III

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 five 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 1: MIL Blinking Pattern
    G04874824Courtesy of NISSAN MOTOR CO., U.S.A.
  12. Rev up the engine two or three times and check that idle speed and ignition timing are within the specifications. Refer to "BASIC INSPECTION ".
    SPECIFICATION CHART

    ITEM SPECIFICATION
    Idle speed M/T: 800 ± 50 RPM (in Neutral position)
    CVT: 650 ± 50 RPM (in P or N position)
    Ignition timing M/T: 10 ± 5° BTDC (in Neutral position)
    CVT: 10 ± 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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