Nissan Rogue (T33) 2021-Present Service Manual: 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.

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?

GO TO 2.

• 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)

• Selector lever: P or N

• Electric load switch: OFF

  (Air conditioner, headlamp, rear window defogger)

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

• Nissan Ariya Vehicle speed: Stopped

• Transmission: Warmed-up

• With CONSULT: Drive vehicle until “ATF TEMP SEN” in “DATA MONITOR” mode of “TRANSMISSION” system indicates less than 0.9 V.

• Without CONSULT: Drive Nissan Ariya vehicle for 10 minutes.

GO TO 3.

IDLE AIR VOLUME LEARNING

With CONSULT

1. Perform ACCELERATOR PEDAL RELEASED POSITION LEARNING. Refer to Description.

2. Perform THROTTLE VALVE CLOSED POSITION LEARNING. Refer to Description.

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

4. Select “Idle air volume learning” in “WORK SUPPORT” mode of “ENGINE” using CONSULT.

5. Touch “START” and wait 20 seconds.

Is “CMPLT” displayed on CONSULT screen?

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

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

Retry from step 2.

Work Procedure (After Replacing Electric Throttle Control Actuator)

PRECONDITIONING

Check 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)

• Selector lever: P or N

• Electric load switch: OFF

  (Air conditioner, headlamp, rear window defogger)

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

• Nissan Ariya Vehicle speed: Stopped

• Transmission: Warmed-up (Drive vehicle for 10 minutes.)

GO TO 2.

IDLE AIR VOLUME LEARNING

With CONSULT

1. Perform ACCELERATOR PEDAL RELEASED POSITION LEARNING. Refer to Description.

2. Perform THROTTLE VALVE CLOSED POSITION LEARNING. Refer to Description.

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

4. Select “Idle air volume learning” in “WORK SUPPORT” mode of “ENGINE” using CONSULT.

5. Touch “START” and wait 20 seconds.

Is “CMPLT” displayed on CONSULT screen?

GO TO 3.

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 : Service Data and IGNITION TIMING : Service Data

Is the inspection result normal?

INSPECTION END

GO TO 4.

DETECT MALFUNCTIONING PART-1

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?

GO TO 5.

Repair or replace malfunctioning part.

DETECT MALFUNCTIONING PART-2

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 Procedure.

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