Renault Megane, Scenic

Since 1996 of release

Repair and car operation

Reno Megan, Stsenik
+ Cars of mark Renault Megane
+ Maintenance service
+ Engine repair
+ System of cooling, heating
+ Power supply systems, release
- Engine electric equipment
   + Charge and start systems
   + Ignition system - petrol models
   - System of preheat of the diesel engine
      Removal, survey and installation of candles накаливания
      Removal and installation of the block of management by heat system
      Adjustment, check, removal and installation of the microswitch of heat
      Adjustment, check, removal and installation of the microswitch of the conditioner of air
      Check, removal and installation of the gauge of temperature of a cooling liquid
      The general description and replacement of components of system of heating of the fuel filter with heat system
+ Coupling
+ Transmission
+ Power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Electric equipment schemes

Adjustment, check, removal and installation of the microswitch of heat

The two-functional switch of heat and recycling the fulfilled gases is established only on engine F8Q 620.


1. The engine should be muffled. Press against the stop the lever of gas and insert probe in the thickness of 5 mm between the lever and the lock screw maximum engine turns on the fuel pump (address to an accompanying illustration).

2a. The heat microswitch on ТНВД Lucas:В the accelerator Lever
Y — ShChup
1 — the Microswitch
2 — the Socket
3 — the Screw of adjustment of delay
4 — the Bolt
5 — the Cam

2b. Adjust microswitch position, having turned away two fixing screws and pushing him on the left. The microswitch should disconnect a food of the electromagnetic valve when the gas lever settles down in 5 mm from the screw.


1. There is a simple method of check of work of the microswitch. At first connect an electroconducting socket.
2. With the engine idling, three-four times disconnect and connect a vacuum tube of the electromagnetic valve recycling the fulfilled gases. The noise specifying should be audible that the valve is correctly placed.

3. The engine still idles. Disconnect a vacuum tube again and place a small piece of a paper on a connecting branch pipe (address to an accompanying illustration). The paper should be kept by vacuum. Then press the gas lever. The paper should fall, when the gas lever will settle down on distance of 5 mm from the screw maximum engine turns, showing that vacuum giving stops.

4. After performance of these checks restore electric and vacuum connections, then do a trial trip on high speed (on 3 or to 4th transfer) to clean tubes.


1. Disconnect an electroconducting socket, turn away two screws of fastening and remove the microswitch from an arm on the fuel pump.


1. Make installation upside-down. Adjust the microswitch as it is described above, and tighten fastening screws.