Rick's Free Auto Repair Advice

Nissan idle relearn procedure

How to perform a Nissan Idle relearn

If you’ve performed a major repair, disconnected the battery, or disconnected a MAF sensor while the engine is running, you may have to perform a Nissan idle relearn procedure (also called an idle air volume relearn procedure).

First, precondition the vehicle: Idle relearn cannot be done if any of these items are out of spec or are missing for even a second during the procedure.

Battery voltage must be more than 12.9 V engine running at idle

Engine coolant temperature must be 158 – 212°F

Shift lever must be in neutral or park

Electric load switches OFF. That means no A/C, headlamp, rear window defogger

If you have daytime running lights (DRL) do this procedure to shut them off:

BEFORE starting the engine:

Apply the parking brake, or set the lighting switch to the 1st position.

Steering wheel must be in straight-ahead position) position and vehicle must be stopped

Transmission must be at fully warm temp

On CVT models, drive vehicle for at least 10 mins before starting procedure.

IDLE AIR VOLUME PROCEDURE

YOU WILL NEED A STOPWATCH TO DO THIS

You cannot do this procedure if you have an accelerator pedal position sensor trouble code stored.

DO this first

Perform ACCELERATOR PEDAL RELEASED POSITION LEARNING procedure:

Foot off the pedal

Turn key to ON and wait at least 2-secs.

Turn key to OFF and wait at least 10-secs.

Turn key to ON and wait at least 2-secs.

Turn key to OFF and wait at least 10-secs.

Then perform the THROTTLE VALVE CLOSED POSITION LEARNING procedure

Warm up the engine

Turn the key to OFF and wait at least 10-secs.

Foot off the pedal, turn key to ON and 3-secs.

Repeat the following procedure quickly FIVE times within 5 seconds.

Pedal to the floor, then full release.

After the 5 pedal presses, wait 7 seconds and depress the accelerator pedal to the floor again and keep it there for approx. 20 seconds until the malfunction light stops blinking and turns ON steady.

Release the accelerator pedal within 3 seconds after malfunction light stops blinking and turns ON steady.

Start engine and let it idle. Then check idle speed and ignition timing.

To do a Mixture Ratio Self Learning Value Clear procedure

Engine at operating temp.

Turn key to OFF

Disconnect the MAF sensor harness connector.

Restart the engine and let it idle for at least 5-secs.

Stop engine and reconnect MAF connector

You should have a malfunction light after this procedure with trouble code P0102 stored. That confirms the reset was done correctly. Use your code reader or scan tool to clear the code.

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

If you get any of these issues, repeat the entire procedure again:

The Engine stalls. Idle speed is wrong.

 

Posted on by Rick Muscoplat



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