Renault Kangoo Quiz
Engine and peripherals

Idle speed adaptive correction

In this manual: Engine and peripherals
Renault Kangoo Driver's Manual — 100Mechanisms and accessories — 44Mechanisms and Accessories — 7Diagnostic — 61Bodywork — 85Electrical equipment — 31Engine and peripherals — 88Bodywork — 24Chassis — 56Renault Kangoo 2 Electric Owner's Manual — 21Transmission — 14Air conditioning — 26General vehicle information — 24Sealing and soundproofing — 1Trim and upholstery — 1
~1min read

PRINCIPLE

During normal operation when warm, the idle R.C.O. value varies between a high value and a low value to obtain the nominal idle speed.

Due to operating variations (running-in, engine fouling, etc.), the idle R.C.O. value may be close to the high or low limits.

The adaptive correction (#21) on the idle R.C.O. (#12) compensates for slow changes in the engine's air requirement, re-centering the R.C.O. (#12) on an average nominal value.

This correction is only active if the coolant temperature is above 75°C, 20 seconds after engine start, and when the idle speed is under nominal idle control.

IDLE R.C.O. VALUES AND ADAPTIVE CORRECTION

Valeurs du r.C.O. Ralenti et de sa correction adaptative

INTERPRETATION OF THESE DATA

In the case of excess air (air intake leak, misadjusted throttle stop, etc.), the idle speed increases: the idle R.C.O. value (#12) decreases to return to nominal idle speed, and the adaptive correction value (#21) decreases to re-center the idle R.C.O. (#12).

In the case of insufficient air (fouling, etc.), the logic is reversed: the idle R.C.O. (#12) increases and the adaptive correction (#21) also increases, to re-center #12 on an average nominal value.

IMPORTANT: after clearing the ECU memory (disconnecting the battery), the engine must be left running at idle before returning the vehicle to the customer so that the adaptive correction can re-adjust correctly.

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