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Nissan Armada 2025-2026 Service and Repair Manual: Idle Air Volume Learning

Nissan Armada 2025-2026 Service and Repair Manual / Engine / Engine Control System. Vr35ddtt / Idle Air Volume Learning

Description

Idle Air Volume Learning is a function of ECM to learn the idle air volume that keeps engine idle speed within the specific range. It must be performed under the following conditions:

  • Each time electric throttle control actuator or ECM is replaced.

  • Idle speed or ignition timing is out of specification.

(For details, refer to Work Procedure .)

Work Procedure

Work Procedure (Before Replacing Electric Throttle Control Actuator)

CHECK DTC

Perform DTC P0101 confirmation procedure. Refer to DTC Description.

Is the DTC P0101 displayed?

YES>>

GO TO 2.

NO>>

  • Replace electric throttle control actuator. Refer to Removal and Installation.

  • After replacing electric throttle control actuator, perform necessary work.

PRECONDITIONING

Make sure that all of the following conditions are satisfied.

Learning will be cancelled if any of the following conditions are missed for even a moment.

  • Battery voltage: More than 12.9 V (At idle)

  • Engine coolant temperature: 70 - 105°C (158 - 221°F)

  • Shift position: P or N

  • Electric load switch: OFF

    (Air conditioner, headlamp, rear window defogger)

  • On Nissan Armada vehicles equipped with daytime running light systems, set lighting switch to the 1st position to light only small lamps.

  • Steering wheel: Neutral (Straight-ahead position) position

  • vehicle speed: Stopped

  • Transmission: Warmed-up

    • With CONSULT: Drive vehicle until “ATF TEMP SE 1” in “Data monitor” mode of “TRANSMISSION” system indicates less than 0.9 V.

    • Without CONSULT: Drive vehicle for 10 minutes.

>>

GO TO 3.

IDLE AIR VOLUME LEARNING

With CONSULT

  1. Perform ACCELERATOR PEDAL RELEASED POSITION LEARNING. Refer to Work Procedure.

  2. Perform THROTTLE VALVE CLOSED POSITION LEARNING. Refer to Work Procedure.

  3. Start engine and warm it up to normal operating temperature.

  4. Select “IDLE AIR VOL LEARN” in “Work support” mode with CONSULT.

  5. Touch “START” and wait 20 seconds.

Is “CMPLT” displayed on CONSULT screen?

YES>>

  • Replace electric throttle control actuator. Refer to Removal and Installation.

  • After replacing electric throttle control actuator, perform necessary work.

NO>>

Retry from step 2.

Work Procedure (After Replacing Electric Throttle Control Actuator)

PRECONDITIONING

Make sure that all of the following conditions are satisfied.

Learning will be cancelled if any of the following conditions are missed for even a moment.

  • Battery voltage: More than 12.9 V (At idle)

  • Engine coolant temperature: 70 – 105°C (158 – 221°F)

  • Shift position: P or N

  • Electric load switch: OFF

    (Air conditioner, headlamp, rear window defogger)

    On Nissan Armada vehicles equipped with daytime running light systems, set lighting switch to the 1st position to light only small lamps.

  • Steering wheel: Neutral (Straight-ahead position)

  • vehicle speed: Stopped

  • Transmission: Warmed-up

  • With CONSULT: Drive vehicle until “ATF TEMP SE 1” in “Data monitor” mode of “A/T” system indicates less than 0.9 V.

Do you have CONSULT?

>>

GO TO 2.

PERFORM IDLE AIR VOLUME LEARNING

With CONSULT

  1. Perform Accelerator Pedal Released Position Learning. Refer to Work Procedure.

  2. Perform Throttle Valve Closed Position Learning. Refer to Work Procedure.

  3. Start engine and warm it up to normal operating temperature.

  4. On CONSULT screen, select “ECM”>>“Work support”>>“Idle air volume learning”.

  5. Touch “START” and wait 20 seconds.

Is “CMPLT” displayed on CONSULT screen?

YES>>

GO TO 3.

NO>>

GO TO 4.

CHECK IDLE SPEED AND IGNITION TIMING

Rev up the engine two or three times and make sure that idle speed and ignition timing are within the specifications.

For specification, Refer to Idle Speed. and refer to Ignition Timing.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

GO TO 4.

DETECT MALFUNCTIONING PART

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 5.

NO>>

Repair or replace malfunctioning part.

DETECT MALFUNCTIONING PART

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 Diagnosis 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 all over again:

  • Engine stalls.

  • Erroneous idle.

>>

INSPECTION END

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