Renault Megane II Throttle Body Service

General information

It is desirable to remove and clean the throttle body after 15 000 km of vehicle mileage or when faults are detected.

Main faults of the throttle body:

incorrect determination of the extreme positions of the throttle valve;
incorrect programming of the initial position of the throttle valve;
fault of the throttle valve drive (jamming);
mismatch between the target and current positions of the throttle valve;
mismatch between the target and current positions of the throttle valve after the latter rebounds from the lower stop (causes a transition to the backup mode).

Removing and cleaning the throttle body

Note: we will show the dismantling and cleaning using the 2.0 l engine as an example. On engines of other power ratings the process is not particularly different.

Necessary tools: flat-blade screwdriver, 10 mm socket spanner, cleaning fluid.

Precautions: we prepare the vehicle for repair. We disconnect the negative battery terminal.

Disconnecting the negative battery terminal — We disconnect the negative battery terminal

Loosening the air duct securing clip at the throttle body — With a flat-blade screwdriver we loosen the clip securing the air duct to the throttle body

Loosening the air duct securing clip at the air filter housing — We loosen the clip securing the air duct to the air filter housing

Removing the air duct — We remove the air duct

Unscrewing the throttle body securing bolts — With a 10 mm spanner we unscrew four bolts securing the throttle body

Disconnecting the recirculation pipe — We disconnect the recirculation pipe

Disconnecting the throttle control connector — We press the retainer with a thin screwdriver and withdraw the throttle control connector

Throttle body removed — We withdraw the throttle body for cleaning

Cleaning:

We clean the throttle body with carburettor cleaning fluid.
We blow the throttle body through with compressed air.

Blowing the throttle body through with compressed air — We blow the throttle body through with compressed air

Refitting: we refit the throttle body in the reverse sequence. When refitting we check the rubber sealing ring.

After replacement: after refitting the throttle body it is recommended to perform the throttle adaptation using diagnostic equipment or by means of several ignition switch-on cycles.