Relearn the Idle (Idle Air Volume Learning)

Last updated: June 10, 2026

If your Nissan Juke (F15, 2010–2019) idles rough, hunts, or hangs high after you disconnected the 12-volt battery or cleaned the throttle body, the engine has lost its learned idle-air setting. The HR16DE and HR12DE petrol engines use a fully electronic throttle with no idle screw — the ECU teaches itself the idle-air volume, and that value is wiped any time power is cut to the throttle actuator or ECM. The fix is the factory Idle Air Volume Learning relearn, an owner pedal sequence that needs no scan tool.

When you need the idle relearn

Perform this after any of the following on a petrol F15 Juke:

• The 12-volt battery was disconnected or went flat (see our Juke F15 battery disconnect/reconnect guide).
• The throttle body was removed, cleaned, or unplugged.
• The ECM was replaced or its connector was unplugged.
• Idle is unstable, hunting, or sitting high, or you have a stored P0507 (idle higher than expected) code.

The relearn is completely non-destructive. If the timing goes wrong you simply start over — nothing is harmed, no setting is permanently changed. It only applies to the petrol Juke; this procedure is not relevant to any vehicle without an idling combustion engine.

Pre-conditions — all must be true

• Engine fully warmed to operating temperature (70–100 °C). Drive 10–15 minutes first; the relearn will not take on a cold engine.
• Battery voltage above 12.9 V at idle — a tired battery is the most common reason the relearn won’t complete.
• Gear selector in P or N (CVT) or Neutral (manual), handbrake on.
• All electrical loads OFF: air conditioning, headlights, heated rear window, blower, radio.
• Front wheels pointing straight ahead, steering not on lock.
• A stopwatch ready — the timing windows are tight (5 presses inside 5 seconds).

The full Idle Air Volume Learning relearn

The procedure has three stages. Do them in order.

1. Stage 1 — Accelerator Pedal Released Position Learning. With the pedal fully released, turn the ignition ON (do not start), wait at least 2 seconds, turn OFF and wait at least 10 seconds. Repeat that ON/OFF cycle once more. This teaches the ECM where “pedal at rest” is.
2. Stage 2 — Throttle Valve Closed Position Learning. With the pedal fully released, turn the ignition ON, then OFF, and wait at least 10 seconds. During those 10 seconds you should hear the throttle motor clicking as the valve cycles — that confirms the stage took.
3. Stage 3 — Idle Air Volume Learning (the pedal dance). Start the warmed engine and let it idle, then turn the ignition OFF and wait at least 10 seconds. Confirm the pedal is fully released, turn the ignition ON and wait exactly 3 seconds. Now fully depress and fully release the accelerator pedal 5 times within 5 seconds — floor it and lift completely, five clean strokes, using the stopwatch. Wait about 7 seconds, then press the pedal to the floor and hold it. After roughly 20 seconds the malfunction-indicator (engine) light, which has been blinking, stops blinking and glows steady. Within 3 seconds of it going steady, fully release the pedal.
4. Start the engine and let it idle. Rev it gently two or three times and confirm the idle settles smoothly to the normal 650–750 rpm.

If the idle is still rough

• The engine light never started blinking in Stage 3 — a timing window was missed. Switch off, wait, and start again from Stage 1.
• Battery was weak. Charge it fully (above 12.9 V) and redo — this is the single most common cause of a relearn that won’t complete on the F15.
• Idle drifts for the first few minutes, then settles — normal. Drive a 10-minute mixed cycle to let the adaptation finish.
• Still hunting after a good relearn — suspect a vacuum leak (an intake hose disturbed during the battery or throttle work is the usual culprit) or a dirty throttle plate that needs cleaning before the relearn will hold.

Frequently Asked Questions

Does the Juke F15 really not need a scan tool for the idle relearn?

Correct — the pedal-sequence method is the official Nissan owner procedure for the HR16DE/HR12DE Juke and needs no CONSULT or aftermarket tool.

Why does my Juke idle high after I disconnected the battery?

Cutting battery power erased the ECM’s learned idle-air volume. Until it relearns, the throttle holds a default opening that is usually too high, so the engine sits at 1,200–1,500 rpm and may hunt. The relearn restores the correct learned value.

How long should the engine warm up before the relearn?

Until coolant is at 70–100 °C — about 10–15 minutes of driving. The Stage 3 learning will not take on a cold engine.

The relearn worked but the idle still drifts a little. Is that normal?

A slight drift for the first few minutes is normal as fuel trims re-adapt. A 10-minute drive cures it. Persistent hunting points to a vacuum leak or a throttle plate that needs cleaning.

Can the pedal dance damage anything if I get the timing wrong?

No. If a window is missed the procedure simply does not complete — the engine light won’t go steady. Switch off and start again. The relearn writes only the idle-air value; it cannot harm the engine or throttle.

If a throttle or idle trouble code such as P0507, P0505 or a throttle-position fault stays stored after the relearn, look up exactly what it means and which sensor it points to at autodtcs.com.