Renault Laguna tyre inflation system

NOTE: The UCH (Universal Car Harness) is an electronic control module that is fitted to many late model Renaults (early 2000's onwards.) It is responsible for controlling
many of the non-engine related functions of the car

The valve sends information to the receiver containing:- its status, pressure and program code. The receiver
Decodes this information and sends it to the UCH.
When the car is moving, the valves transmit this signal every minute if no leak is present and every 10 seconds if
a leak is present
With the car stationary, the valves issue this information every hour if no air leak is present and every 15 minutes
if an air leak is present
If a valve exciter is not available, the valve status can be changed by allowing some air to escape (drop the tyre
Pressure by at least 1 bar, which will raise the wheel to status 2 on the parameter menu).
This can be done with the car stationary, in which case wait 15 minutes for each wheel,
Or with the car moving at a speed 15 mph,
NOTE: this can only be done one wheel at a time
Reinflating wheel repeat process for each wheel.




Front Left – Green
Front Right – Yellow
Rear Left – Red
Rear Right – Black