How the Tire Pressure Monitoring System Works
The Tire Pressure Monitoring System
warns the driver if tire pressures are
too low.
The Tire Pressure Monitoring System uses the ABS sensors to monitor the RPM and therefore the rolling circumference of the
individual wheels during travel.
If a tire loses air or the tire pressure is too low, the rolling circumference is reduced and the RPM increases.
The Tire Pressure Monitoring System shows a change in the rolling circumference of the tires via the
instrument cluster.
indicator light in the
The following situations can also cause the RPM to change:
The tire pressure has changed
The tire has structural damage
One side of the vehicle has a heavier load than the other
Snow chains are installed on the tires
Only one wheel was replaced on each axle
The Tire Pressure Monitoring System will not work if the ESC or ABS is malfunctioning ⇒ Troubleshooting.
Reference Pressure
The reference pressure for the Tire Pressure Monitoring System is the recommended tire pressure for the tires installed at the
factory when the tires are cold at maximum load. The reference pressure corresponds to the details on the tire pressure label
⇒ Checking the tire pressure.
If the tire pressure has been correctly adjusted on all four tires, the Tire Pressure Monitoring System must be re-calibrated
⇒ Calibrating the Tire Pressure Monitoring System . This adapts the reference pressure to the current tire pressure.
The Tire Pressure Monitoring System
may not react at first or may not react at all when you are driving in a sporty manne
or on snow-covered or unpaved roads, when you are driving with snow chains, or in certain other situations. A change in the
tread circumference of a tire is signaled by the Tire Pressure Monitoring System indicator in the instrument cluster (telltale).
The tire pressure recommended for the tires originally installed on the vehicle is on a sticker on the driver door jamb.
Each tire, including the spare (if provided), should be checked monthly when cold and inflated to the inflation pressure
recommended by the vehicle manufacturer on the vehicle placard or tire inflation pressure label. (If your vehicle has tires of a
different size than the size indicated on the vehicle placard or tire inflation pressure label, you should determine the proper tire
inflation pressure for those tires).
As an added safety feature, your vehicle has been equipped with a tire pressure monitoring system (TPMS) that illuminates a
low tire pressure telltale when one or more of your tires is significantly under-inflated. Accordingly, when the low tire pressure
telltale illuminates, you should stop and check your tires as soon as possible, and inflate them to the proper pressure. Driving
on a significantly under-inflated tire causes the tire to overheat and can lead to tire failure. Under-inflation also reduces fuel
efficiency and tire tread life, and may affect the vehicle's handling and stopping ability.
Please note that the TPMS is not a substitute for proper tire maintenance, and it is the driver's responsibility to maintain correc
tire pressure, even if under-inflation has not reached the level to trigger illumination of the TPMS low tire pressure telltale.
Your vehicle has also been equipped with a TPMS malfunction indicator to indicate when the system is not operating properly
The TPMS malfunction indicator is combined with the low tire pressure telltale. When the system detects a malfunction, the
telltale will flash for approximately one minute and then remain continuously illuminated. This sequence will continue upon
subsequent vehicle start-ups as long as the malfunction exists.
When the malfunction indicator is illuminated, the system may not be able to detect or signal low tire pressure as intended.
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