Tire Pressure Monitoring System Description And Function: Notes
TPMS system warns the driver if the tire pressure is below or above the recommended pressure. If an issue or missing sensor signal is detected, a TPMS alert symbol will be displayed on the Infotainment display. Also, an alert popup will be shown on the screen and an audible alarm will be generated at the same time.
A warning message from an ECU can induce the following notifications:
- Warning message on MDU
- Tell-tale/indicator on MDU
- Warning sound
- Warning message notifications contain a warning symbol and the message title
- Push the notification to expand the message
- To close a notification, push the cross on the upper right corner
TPMS System Components:
TPMS pressure sensors (1 at each wheel)
Technical Description:
The vehicle is equipped with Direct TPMS (dTPMS): The system uses sensors attached to the valve in each wheel to show information related to the vehicle tire pressures and air temperature. Information is gathered and analyzed by the BCM which receives information from each TPMS sensor via Radio Frequency. TPMS covers the following functions:
- RCP Function (Recommended Cold Pressure Function)
- Self-test after Power-ON
- High/low pressure alarm
- High temperature alarm
- Fast deflation alarm
- Low sensor battery alarm
- Sensor lost alarm
- Learning function
- Actual tire pressure of all wheels
Each sensor has its own non-replaceable battery that allows it to transmit a signal to the BCM. When the battery goes flat, the sensor needs to be replaced.
When a sensor is replaced, a relearn procedure is required for the BCM to find the new sensor. (See TIRE PRESSURE SENSOR REMOVAL AND INSTALLATION/REPLACEMENT AND LEARN PROCEDURE .)
Schematic Diagram:
Operation:
MDU: To view the tire pressures, swipe across on the vehicle display.
If no issue or missing signal is detected, vehicle health status is declared as error free.