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Home >> Infiniti >> 2018 >> Q70 Hybrid Luxe >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Introduction And Basic Inspection) (Hybrid) >> Basic Inspection >> Idle Air Volume Learning >> Work Procedure
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Work Procedure

  1. START 
    CAUTION: Note that the engine starts automatically when starting the Idle Air Volume Learning during engine stop control.

    With CONSULT

    GO TO 2.

    Without CONSULT

    GO TO 7.

  2. PRECONDITIONING-I 

    SYMBOL With CONSULT

    1. Turn ignition switch ON.
    2. Select "HV BATTERY LEVEL" in "DATA MONITOR" mode of "EV/HEV".
    3. Check "HV BATTERY LEVEL" data monitor item indication.

    Is the "HV BATTERY LEVEL" indicating 50% or more?

    YES

    GO TO 3.

    NO

    1. Charge the Li-ion battery.
    2. GO TO 3.
  3. PRECONDITIONING-II 

    SYMBOL With CONSULT

    1. Select "COOLAN TEMP/S" in "DATA MONITOR" mode of "ENGINE" with CONSULT.
    2. Check "COOLAN TEMP/S" data monitor item indication.

    Is the "COOLAN TEMP/S" indicating a temperature between 70 deg.C and 100 deg.C?

    YES

    GO TO 4.

    NO

    1. Adjust Engine coolant temperature between 70 deg.C and 100 deg.C.
      NOTE: When warm engine up to normal operating temperature, perform "INSPECTION MODE 5". Refer to Description .
    2. Turn ignition switch OFF.
    3. GO TO 4.
  4. PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING 

    Perform Accelerator Pedal Released Position Learning. Refer to Description .

    GO TO 5.

  5. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING 

    Perform Throttle Valve Closed Position Learning. Description .

    GO TO 6.

  6. PERFORM IDLE AIR VOLUME LEARNING 

    SYMBOL With CONSULT

    1. Set the vehicle to READY.
    2. Make sure that all of the following conditions are satisfied.
      • Li-ion battery charging status: 50% or more
      • Engine coolant temperature: 70 - 100 deg.C (158 - 212 deg.F)
      • Battery voltage: More than 12.9 V (At idle)
      • Selector lever: P or N
      • Electric load switch: OFF

        (Air conditioner, headlamp, rear window defogger)

      • Steering wheel: Neutral (Straight-ahead position)
      • Vehicle speed: Stopped
      • Transmission: Warmed-up (Drive vehicle for 10 minutes.)
    3. Select "IDLE AIR VOL LEARN" in "WORK SUPPORT" mode of "ENGINE" with CONSULT.
    4. Touch "START".
      NOTE: The engine starts automatically.
    5. Wait 20 seconds at idle.

    Is "CMPLT" displayed on CONSULT screen?

    YES

    GO TO 12.

    NO

    GO TO 13.

  7. PRECONDITIONING-I 

    SYMBOL Without CONSULT

    1. Turn ignition switch ON.
    2. Check "Assist/charge gauge" in combination meter.

    Is the "Assist/charge gauge" indicating battery power 50% or more?

    YES

    GO TO 8.

    NO

    1. Charge the Li-ion battery.
    2. Turn ignition switch OFF.
    3. GO TO 8.
  8. PRECONDITIONING-II 

    SYMBOL Without CONSULT

    1. Perform "INSPECTION MODE 5".
    2. Start engine and warm it up to normal operating temperature.
    3. Turn ignition switch OFF.

    GO TO 9.

  9. PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING 

    Perform Accelerator Pedal Released Position Learning. Refer to Description .

    GO TO 10.

  10. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING 

    Perform Throttle Valve Closed Position Learning. Description .

    GO TO 11.

  11. PERFORM IDLE AIR VOLUME LEARNING 

    SYMBOL Without CONSULT

    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. Make sure that all of the following conditions are satisfied.
      • Li-ion battery charging status: 50% or more
      • Engine coolant temperature: 70 - 100 deg.C (158 - 212 deg.F)
      • Battery voltage: More than 12.9 V (At idle)
      • Selector lever: P or N
      • Electric load switch: OFF

        (Air conditioner, headlamp, rear window defogger)

      • Steering wheel: Neutral (Straight-ahead position)
      • Vehicle speed: Stopped
      • Transmission: Warmed-up (Drive vehicle for 10 minutes.)
    2. Turn ignition switch OFF and wait at least 10 seconds.
    3. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
    4. Repeat the following procedure quickly five times within 5 seconds.
      1. Fully depress the accelerator pedal.
      2. Fully release the accelerator pedal.
    5. Wait 7 seconds, fully depress the accelerator pedal for approx. 20 seconds until the MIL stops blinking and illuminates.
    6. Fully release the accelerator pedal within 3 seconds after the MIL illuminates.
    7. Set the vehicle to READY.
    8. Wait 20 seconds.
      G04073707Courtesy of NISSAN NORTH AMERICA, INC.

    GO TO 12.

  12. CHECK IDLE SPEED AND IGNITION TIMING 
    1. Start engine and warm it up to normal operating temperature.
    2. Let it idle for 20 seconds.
    3. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the specifications. Refer to Idle Speed and Ignition Timing .

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    GO TO 13.

  13. DETECT MALFUNCTIONING PART-I 

    Check the following

    • Check that throttle valve is fully closed.
    • Check PCV valve operation.
    • Check that downstream of throttle valve is free from air leakage.

    Is the inspection result normal?

    YES

    GO TO 14.

    NO

    Repair or replace malfunctioning part.

  14. DETECT MALFUNCTIONING PART-II 

    Engine component parts and their installation condition are questionable. Check and eliminate the cause of the incident.

    It is useful to perform "TROUBLE DIAGNOSIS - SPECIFICATION VALUE". Refer to Description .

    If any of the following conditions occur after the engine has started, eliminate the cause of the incident and perform Idle Air Volume Learning again:

    • Engine stalls.
    • Erroneous idle.

    INSPECTION END

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