General information
The system consists of:
- four pressure sensors 1 built into the valves (one per wheel) and transmitting radio signals:
- receiver 2 located under the vehicle. It receives and decodes the sensor signals, transmits them to the central electronic unit in the cabin (CECBS);
- UCH 3, which receives and processes information from the receiver 2, and also determines the message for indication;
- display 4 (special or built into the instrument panel).
This system allows you to constantly monitor the pressure in the tires of the car (except spare wheel).
During operation, the system uses:
- four pressure sensors (with integrated valves) in each wheel of the car (except spare);
- receiver located under the car;
- electronic control unit built into the UCH;
- light indicators showing the type of malfunction;
- vehicle icon display to identify the faulty wheel. On the instrument panel of the maximum configuration, the display shows the pressure values each time the car is started and when a malfunction is detected.
Peculiarities
Each sensor is marked with a color mark around the valve:
- green - left front;
- yellow - right front;
- red - left rear;
- black - right rear.
Attention! It is necessary to install the wheels in strict accordance with the color marking in order to read reliable information about the location of the malfunction on the display or displays (depending on configuration). Each sensor is recognized by the UCH with a code. If the sensor is replaced, it is necessary to enter its code into the UCH, depending on its position on the vehicle and its color mark (see «sensor replacement»).
The tire pressure monitoring system allows you to set the card in the reader in the 2nd fixed position to show tire pressure with an accuracy of 0.1 bar.
In addition, the system warns the driver if:
- pressure below 0.6 bar;
- pressure is too high;
- there is a large air leak from the tire;
- the wheel is defective;
- The tire pressure on the left and right side of the vehicle is different.
Pressure meter
The pressure sensor consists of:
- conventional valve;
- the actual pressure sensor;
- a special radio signal transmitter;
- non-removable battery.
Note. The pressure sensor valve battery cannot be replaced. Each sensor is marked with a colored label. When changing a valve, changing a tire or removing a wheel, be sure to consider the color of the sensor.
Sensors (powered by a built-in battery), constantly measure the tire pressure and transmit the relevant information and their identification codes via radio waves.
Programming the sensor in the UCH
The UCH can identify the second set of tire pressure sensors. Make sure that the color marking matches the location of the sensors.
RF receiver
The receiver is located under the car and receives signals from pressure sensors.
He transmits them via the wired line of the UCH. After signal processing to detect tire air leaks (or tire puncture) or under-inflated tire The UCH issues a command to display information on the instrument panel.
Information is transmitted to the driver through:
- signaling devices showing the type of malfunction (the wheel is punctured, the wheel is flat, etc.);
- detection of car pictograms, which allows to localize a faulty wheel;
- a display built into the instrument panel of the maximum configuration and showing the tire pressure values \u200b\u200bwhen the engine is started, as well as displaying malfunctions.
Programming pressure sensors in the UCH
Note. The presence of tire pressure sensors requires precautions when removing and mounting tires. Failure to follow these precautions may result in damage to the transducers and, consequently, to the failure of the pressure control system.
Note. To replace the sensor, it is necessary to dismantle and mount the tires.
There are several ways to enter the sensor code into the UCH. These operations require the use of a diagnostic tool (except XR25):
- manual entry of the sensor code. The code is given on a label attached to the sensor;
- programming code with fixture «Ms. 1607 Sensor exciter»;
- programming while driving.
Manual programming of the sensor code (code entry)
Set the card in the reader to the 2nd fixed position and use the diagnostic tool to enter into dialogue with the tire pressure monitoring system.
Select command mode menu then special command,
Select line SC 001: valve code programming.
Enter a code of up to six digits from the label attached to the sensor.
Confirm the position of the wheel on which this sensor is installed.
Confirm the wheel season (selected by default if the car has only one set of wheels).
Note. The procedure is identical for programming four sensor codes with command SC 002: programming four sensor codes Automatic valve code programming using an initiator (Ms. 1706).
Set the card in the reader to the 2nd fixed position and use the diagnostic tool to enter into dialogue with the tire pressure monitoring system.
Select command mode menu then special command.
Select line SC 001: valve code programming.
Select the position of the memorized sensor on the vehicle on the instrument.
Attach the device Ms. 1607 to the tire under the corresponding valve.
Press the device switch Ms. 1607.
Wait for the end of the programming process (the signal lamp will light up).
The scan tool will confirm correct receipt of the valve code.
Confirm the position of the wheel on which this sensor is installed.
Confirm the wheel season (selected by default if the car has only one set of wheels).
Note. The procedure is identical for programming four valve codes with command SC 002: programming four sensor codes. Programming is done in this order: left front wheel, right front wheel, right rear wheel, left rear wheel. Automatic programming of the valve code by lowering the wheel.
Note. The valve sends a message to the receiver, including: its code, its pressure and its status. The receiver decodes this information and transmits it to the UCH.
When the car is moving, the valve sends a message once a minute (if everything is ok) and once every 10 s if it is in state 2 (air leak).
When the vehicle is stationary, the valve sends a message once per hour (if everything is ok) and once every 15 minutes if there is an air leak.
The state of the valve can be changed by leaking:
- the car is stationary: in this case, wait fifteen minutes for each wheel;
- the vehicle is moving at a speed greater than 20 km/h. Carrying out this operation is possible only sequentially, wheel by wheel.
Set the card in the reader to the 2nd fixed position and use the diagnostic tool to enter into dialogue with the tire pressure monitoring system.
Reduce the tire pressure by about 1 bar.
Select command mode menu then special command.
Select line SC 001: programming the sensor code.
Do a road test.
Confirm the position of the wheel on which this sensor is installed.
Confirm the wheel season (selected by default if the car has only one set of wheels).
Pump up the wheel again.
Repeat the operation for each valve whose code you want to remember.
Attention! After the programming procedure, one or more valve sensors should be checked.
Writing codes to memory
Codes are presented in the menu «Parameters - all sensor codes must be different.
Season of use
Allows you to display information on the instrument panel in the menu: «State». ET 007: «Selected set of wheels; summer or winter».
If the car has only one set of wheels, select the summer season.
If the UCH has memorized two codes, the season selection takes place automatically on the first trip in order to change the season of use using the diagnostic tool:
Choose: «Command mode, parameter setting - and point to: VP 002 «Wheel set selection».
Move the cursor to the winter button Press enter, use the arrows above and below to select the climate type, then confirm,
Press the blue button again, the memorization window will open. Choose: «Yes» for confirmation.
Recommended pressure values Recommended maximum and minimum pressure values can be viewed in 8 menus: «Options». To change these values, select: «Command mode, setting parameters», VP 009: «Entering the recommended pressure».