Info for everybody:
RENUALT LAGUNA II ***8211; TYRE PRESSURE MONITORING SYSTEM
The tyre pressure monitoring system displays errors after replacing or rotating tyres on vehicle.
The Renault Laguna II models in question are all fitted with the Renault tyre pressure monitoring system, fitted either as standard or as an option on the vehicle. The tyre pressure monitoring system incorporates tyre pressure sensors located as part of the tyre pressure valve assembly.
The tyre pressure sensors are coded to the tyre pressure monitoring system for location on each wheel on the vehicle, and if a wheel is swapped around on the vehicle or the tyre pressure sensors are replaced, the tyre pressure monitoring system detects an incorrect signal from the swapped wheels and displays errors on the instrument cluster.
Renault Laguna II
All models fitted with the tyre pressure monitoring system.
System operation and rectification of faults
The Renault tyre pressure monitoring system consists of the following 4 components:
A tyre pressure sensor built into the tyre pressure valves (one per tyre) to monitor the pressure of each tyre on vehicle (not fitted to the spare wheel).
A tyre pressure monitor control module (
) which is used to decode and process the signals from each of the tyre pressure sensors, and outputs the required message to the instrument cluster assembly.
A display either built into the instrument cluster or as a separate assembly on base models with tyre pressure monitoring system fitted as an option
An under body aerial (receiver) to pick up and boost signals from tyre pressure sensors.
The tyre pressure sensors are activated after about one minute of driving faster than 18 MPH (30 km/h). When the vehicle is stationary the tyre pressure sensors send out a signal the to the
approximately once every 60 minutes on normal operation
If the pressure measured inside one or more tyres changes by more than 84 mbar (1.2psi) between two tyre pressure signals, the tyre pressure sensors will send out a signal every 10 seconds to allow the
control module to quickly detect if a tyre is deflating.
control module is programmed with the following warning messages:
"Over inflation when cold" = recommended tyre pressure + 700 mbar (10 psi) during eight cold starts
"Over inflation when hot" = recommended tyre pressure + 850 mbar (12 psi)
"Under inflation when cold" = recommended tyre pressure ***8211; 400 mbar (6psi) during eight cold starts
"Major under inflation" = recommended tyre pressure ***8211; 600 mbar (9psi) mbar
"Imbalance" = pressure difference between the left hand and right hand wheels on the same axle exceeding 500 mbar (7 psi)
"Unsuitable pressure for speed" = at least one wheels pressure when cold is less than the recommended high speed pressure ***8211; 400 mbar (6psi) and the vehicle is driven faster than the 100 MPH (160 km/h) for at least three minutes.
Note. The tyres are considered as being "cold" after approximately 1 hour and 45 minutes after the vehicle has stopped.
Tyre pressure sensors
Each tyre pressure sensor is marked with a ring of a different colour. When a tyre pressure valve or tyre is being replaced, the colour of the sensor should be noted and fitted to the correct side of the vehicle as follows:
Tyre pressure sensor coloured green = Front left location
Tyre pressure sensor coloured yellow = Front right location
Tyre pressure sensor coloured red = Rear left location
Tyre pressure sensor coloured black = Rear right location
Note. If the tyre pressure sensor is damaged or fitted to the incorrect side of the vehicle, the
control module will detect the fault and either require the correct tyre pressure sensor to be fitted to the correct wheel on the vehicle or the
control module can be reprogrammed using suitable page (where possible). In addition, on the inside frame of the driver***8217;s door, there is a decal detailing the colour of each ring and its location for each wheel.
control module is also programmed for two sets of tyres ***8211; summer / winter tyres for regions of Europe where it is common practise to have a separate set of tyres for harsh winter conditions. For these applications, the first time the tyres are changed between summer / winter, the
control module must be programmed by using suitable diagnostic equipment to enter that two sets of tyres (summer/winter) are in use for the vehicle.
Then, when the tyres are changed, the
control module automatically selects the proper set (summer/winter) based on the coded signals produced by the tyre pressure sensors in each wheel for the set.
CONTROL MODULE ***8211; CONFIGURATION & PROGRAMMING
control module has been designed with 4 configurations which can be adjusted / programmed using suitable diagnostic equipment connected to the vehicles 16 pin EOBD diagnostic plug (usually located under the front ashtray in the centre console on the vehicle).
Tyre pressure sensor configuration
Each tyre pressure sensor is matched to the correct wheel during production and the
control module is programmed with the identification codes for each tyre pressure sensor. This is done to ensure that the correct tyre (wheel) can be identified when a pressure drop is detected by the pressure sensor.
It is not recommended to change the wheels around on the vehicle without reprogramming the
control module using suitable diagnostic equipment. If the wheels have been rotated, after reprogramming the
control module, the coloured rings on each tyre valve must be put back in position as described below:
Front left ***8211; Green, Front right ***8211; Yellow, Rear left ***8211; Red, Rear right ***8211; Black
If the driver wants the wheels to be swapped over, there are two possible methods.
Method 1 Remove the tyre pressure sensors from each swapped wheel and replace the tyre pressure sensors in their original position on the vehicle.
Method 2 using suitable diagnostic equipment program the
control module with the new tyre pressure sensor locations (remembering to move the coloured rings so that they are in the correct position as detailed above).
Programming new tyre pressure sensor to
Each tyre pressure sensor transmits a message which includes a unique sensor identity code, tyre pressure measurement and status condition (stationary / driving). If a new tyre pressure sensor is fitted to the vehicle, the tyre pressure sensor identity code must be programmed into the
control module, before the
can recognise the new tyre pressure sensor.
There are two methods to find out the tyre pressure sensor identity codes.
Method 1 if the tyre pressure sensor is new: the new sensor comes with a two part label, one part of which is detachable. The tyre pressure sensor code is written on both sections. The detachable section can be kept by the driver as a reminder of the code once the tyre pressure sensor has been fitted (it is advisable to temporarily stick the label on the wheel containing the sensor).
Method 2 if the tyre pressure sensor has already been mounted on the wheel and no label can be seen: In this case either the tyre can be removed from the wheel and the tyre pressure sensor identity number can be read directly of the body of the tyre pressure sensor, or the tyre pressure sensor identity codes can be obtained by using suitable diagnostic equipment.
Note. It is difficult to read the tyre pressure sensor identity code using diagnostic equipment due to the fact that the tyre pressure sensor only transmits a signal once every hour when the vehicle is stationary. In addition, if more than one new tyre pressure sensor is fitted to the vehicle, it is not possible for the
control module to determine which tyre pressure sensor is transmitting the signal.
In this case, either turn the wheel at a speed above 12 MPH (20 km/h) so that the tyre pressure sensor transmits its signal more frequently for the
control module to detect (with only one new tyre pressure sensor fitted) or force the sensor to transmit its signal by allowing some air to escape (drop the tyre pressure by atleast 1 bar (15 psi).
Manual method of programming tyre pressure sensor identity code into
Using suitable diagnostic equipment, connect to the 16 pink EOBD diagnostic plug (usually located under the front ashtray In the centre console on the vehicle) and select "tyre pressure monitoring system" in the diagnostic equipment menu.
Then, in the diagnostic equipment menu, select "manual tyre pressure sensor code programming". Enter the applicable code for the tyre pressure sensor and then select which wheel the new tyre pressure sensor is located in. The new tyre pressure sensor identity code should then be programmed into the
Note. The actual menu and selection of the tyre pressure sensor identity code and selection of wheel location will vary between diagnostic equipment. Always follow the instructions supplied with the diagnostic equipment.
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