Tire Pressure Monitoring System (TPMS)

The Tire Pressure Monitoring System (TPMS) will warn the driver of low tire pressure based on the recommended cold tire pressure shown on the vehicle placard.

NOTE:

The warning message in the instrument cluster will remain active until the tire is inflated to the placard pressure.

Tire pressure changes with temperature by approximately 1 psi (7 kPa) for every 12°F (6.5°C). This means that when the outside temperature drops, tire pressure will decrease. Tire pressure must always be set based on cold tire pressure. This is defined as the tire pressure after the vehicle has not been driven for at least three hours, or has been driven less than 1 mile (1.6 km) after a three-hour period. Cold tire pressure must not exceed the maximum inflation pressure molded on the tire sidewall. Tire pressure will also increase as the vehicle is driven. This is normal and the increased pressure should not be adjusted.

The TPMS will warn the driver of low tire pressure if the pressure drops below the low pressure warning limit for any reason, including low temperature effects and natural pressure loss through the tire.

The TPMS will continue to warn the driver of low tire pressure while the condition exists, and will not turn off until the tire pressure is at or above the recommended cold placard pressure. After the Low Tire Pressure Warning (Tire Pressure Monitoring System Warning Light) illuminates, inflate the tire to the recommended cold placard pressure to turn off the TPMS warning light.

NOTE: When inflating warm tires, the tire pressure may need to be increased by an additional 4 psi (28 kPa) above the recommended cold placard pressure to turn off the TPMS Warning Light.

The system will update automatically and the TPMS Warning Light will turn off once the system receives updated tire pressure values. The vehicle may need to be driven up to 20 minutes at speeds above 24 km/h for the TPMS to receive this information.

For example, your vehicle may have a recommended cold placard tire pressure (parked for more than three hours) of 33 psi (227 kPa). If the ambient temperature is 68°F (20°C) and the measured tire pressure is 28 psi (193 kPa), a drop in temperature to 20°F (-7°C) will reduce the tire pressure to approximately 24 psi (165 kPa). This tire pressure is low enough to illuminate the TPMS Warning Light. Driving the vehicle may cause the tire pressure to increase to approximately 28 psi (193 kPa), but the TPMS Warning Light will still be on. In this situation, the TPMS Warning Light will turn off only after the tires are inflated to the vehicle's recommended cold placard pressure.

NOTE:

When inflating warm tires, the tire pressure may need to be increased by an additional 4 psi (28 kPa) above the recommended cold placard pressure to turn off the TPMS Warning Light.

• The TPMS has been optimized for the original equipment tires and wheels. TPMS pressure and warning have been set for the tire size equipped on your vehicle. Unwanted system operation or sensor damage may occur when using replacement equipment that is not of the same size, type, and/or style. TPMS sensors are not designed for use on aftermarket wheels and may contribute to low overall system performance. Customers are recommended to use Original Equipment Manufacturer (OEM) wheels to ensure TPMS function performance.
• Using aftermarket tire sealant may cause the Tire Pressure Monitoring System (TPMS) sensor to malfunction. After using aftermarket tire sealant, it is recommended to take the vehicle to an authorized dealer to have your sensor function checked.
• After checking or adjusting tire pressure, always reinstall the valve stem cap. This will prevent moisture and dirt from entering the valve stem, which could damage the TPMS sensor.

NOTE:

• The TPMS is not intended to replace regular tire care and maintenance, or to provide warning of a tire malfunction or tire condition.
• The TPMS should not be used as a substitute for a tire pressure gauge when adjusting tire pressure, unless your vehicle is equipped with a Tire Fill Assist feature. Tire Fill Assist alert or selectable alert feature.
• Driving on a significantly underinflated tire causes the tire to overheat and may lead to tire failure. Underinflation also reduces fuel efficiency and tire life, and may affect the vehicle's handling and braking ability.
• The TPMS does not replace proper tire maintenance, and it is the driver's responsibility to maintain correct tire pressure using an accurate tire pressure gauge, even if underinflation has not reached the level that triggers the TPMS Warning Light.
• Seasonal temperature changes will affect tire pressure, and the TPMS will monitor the actual tire pressure.

System Operation

The Tire Pressure Monitoring System (TPMS) uses wireless technology with electronic sensors mounted on the wheel rims to monitor tire pressure levels. The sensors, installed on each wheel as part of the valve stem, transmit tire pressure readings to the receiver module.

Tire Pressure Monitoring Display

NOTE:

It is especially important for you to check the pressure of all tires on your vehicle monthly and to maintain proper pressure.

The TPMS consists of the following components:

• Receiver Module
• Four Tire Pressure Monitoring System sensors
• Various Tire Pressure Monitoring System messages that are displayed in the instrument cluster
• Tire Pressure Monitoring System Warning Light

Tire Pressure Monitoring Low Pressure Warnings

The TPMS warning light will illuminate in the instrument cluster and a chime will sound when one or more of the four road tires is significantly under-inflated. In addition, the message "Tire Low" will appear in the instrument cluster display for at least five seconds, the message "Inflate to XX" and a graphic showing the pressure value of each tire will be displayed, with the low tire pressure values shown in a different color.

Tire Pressure Monitoring System Low Tire Pressure Warning

If this occurs, stop as soon as it is safe to do so and inflate the low tires (those shown in a different color on the cluster graphic) to the recommended vehicle cold tire pressure shown on the placard, as shown in the "Inflate to XX" message. Once the system receives updated tire pressure information, the system will update automatically, the pressure values on the cluster graphic display will return to their original color, and the TPMS warning light will turn off.

NOTE:

When inflating warm tires, the tire pressure may need to be increased by an additional 4 psi (28 kPa) above the recommended cold placard pressure to turn off the TPMS Warning Light.

The vehicle may need to be driven for up to 20 minutes above 24 km/h for the TPMS to receive this information.

TPMS Service Warning

If a system malfunction is detected, the TPMS warning light will flash for 75 seconds and then remain on continuously. The system malfunction will also sound a chime. In addition, the message "SERVICE TIRE PRESSURE SYSTEM" will appear in the instrument cluster for at least five seconds, and then a dash (--) will be displayed instead of the pressure value to indicate which sensor is not being received.

If the ignition is on, this sequence will repeat if the system malfunction still exists. If the system malfunction no longer exists, the TPMS warning light will no longer flash, the message "SERVICE TIRE PRESSURE SYSTEM" will no longer be displayed, and the pressure value will be displayed instead of the dash. A system malfunction may occur due to any of the following:

• Interference from electronic devices or driving near objects that emit the same radio frequencies as the TPMS sensors
• Installation of any aftermarket window tint that affects radio wave signals
• Heavy accumulation of snow or ice around the wheels or wheel housings
• Use of traction chains on the vehicle
• Use of wheels/tires without TPMS sensors

Vehicles with a full-size spare tire

1. 1
   If your vehicle is equipped with a full-size spare tire and wheel assembly that has a tire pressure monitoring system sensor, it may be monitored by the Tire Pressure Monitoring System (TPMS) when replaced with a road tire with low pressure.
2. 2
   If the full-size spare with a sensor is replaced with a low-pressure road tire, the next ignition cycle will still show the TPMS warning light on, the chime will sound, the message "Inflate to XX" will appear in the instrument cluster, and the graphic display will still show the low tire pressure value in a different color.
3. 3
   Driving the vehicle for up to 20 minutes above 24 km/h will turn off the TPMS warning light, provided no road tires are below the low tire pressure warning threshold.

TPMS Deactivation — If Equipped

TPMS can be deactivated when all four road wheel and tire assemblies are replaced with wheel and tire assemblies that do not have TPMS sensors, for example when installing winter wheel and tire assemblies on your vehicle.

To deactivate TPMS, first replace all four road wheel and tire assemblies with tires not equipped with TPMS sensors. Then drive the vehicle for 20 minutes at speeds above 15 mph (24 km/h). The TPMS will sound a chime, the TPMS warning light will flash for 75 seconds and then remain on. The instrument cluster will display the message "SERVICE TIRE PRESSURE SYSTEM" and then display dashes (--) instead of pressure values.

Beginning with the next ignition cycle, the TPMS will no longer sound a chime or display the message "SERVICE TIRE PRESSURE SYSTEM" in the instrument cluster, but dashes (--) will remain in place of the pressure values.

To reactivate TPMS, replace all four road wheel and tire assemblies with tires equipped with TPMS sensors. Then drive the vehicle for up to 20 minutes at speeds above 15 mph (24 km/h). The TPMS will sound a chime, the TPMS warning light will flash for 75 seconds and then turn off. The instrument cluster will display "SERVICE TIRE PRESSURE SYSTEM" and then display the pressure values instead of dashes. On the next ignition cycle, the "SERVICE TIRE PRESSURE SYSTEM" message will no longer be displayed unless a system malfunction exists.

This feature notifies the driver when the tire pressure display reaches the target pressure while inflating or deflating a tire.

The customer can turn the Tire Inflation Alert feature on or off in the Uconnect system's apps menu.

NOTE:

• Only one tire can be inflated at a time when using the Tire Inflation Alert system.
• The Tire Inflation Alert feature cannot be activated if an existing TPMS malfunction is set as "active" or if the system is in deactivation mode (if equipped).

The system will activate when it detects an increase in tire pressure while the tire is being inflated. The ignition must be in the ON/RUN position with the transmission in PARK for vehicles equipped with an automatic transmission. For vehicles equipped with a manual transmission, the parking brake must be applied.

NOTE:

The engine does not need to be running to enter the Tire Inflation Alert mode.

The hazard warning lights will flash, confirming the vehicle is in Tire Fill Alert mode. If the hazard lights do not flash when inflating a tire, the TPMS sensor may be in a non-operational position, preventing the TPMS sensor signal from being received. In this case, the vehicle may need to be moved slightly forward or backward.

When entering Tire Fill Alert mode, the tire pressure display screen will be shown in the instrument cluster.

Operation:

• The horn will chirp once to notify the user to stop inflating the tire when it reaches the recommended pressure.
• The horn will chirp three times if the tire is overinflated, and will continue to chirp every five seconds if the user continues to inflate the tire.
• The horn will chirp again when enough air has been released to reach the proper inflation level.
• The horn will also chirp three times if the tire is underinflated, and will continue to chirp every five seconds if the user continues to deflate the tire.

Selectable Tire Fill Alert (STFA) — If Equipped

The STFA system is an optional feature, included as part of the standard Tire Fill Alert system. The system allows you to select the pressure to which to inflate or deflate the front and rear axle tires and to provide feedback when inflating or deflating a vehicle tire.

In the Selectable Tire Fill Alert application, located in the Uconnect Apps menu, you can select the pressure setting for both the front and rear axle tires by scrolling through the pressure range from XX to 15 psi in 1 psi increments for each axle setting.

XX = cold tire pressure values on the vehicle placard for the front and rear axles, as shown on the vehicle tire pressure label.

You can also save the pressure values selected for each axle in the Uconnect system application as preset pressure values. Up to two sets of preset pressure values can be stored in the Uconnect system for the front and rear axles. Once you select the tire pressure for the front and rear axles to which you want to inflate or deflate, you can begin inflating or deflating one tire at a time.

NOTE:

The STFA system supports inflating or deflating only one tire at a time. The system will be activated when the TPMS receiver module detects a change in tire pressure. The ignition must be in the ON/RUN mode, with the transmission in PARK for vehicles with an automatic transmission, and in NEUTRAL with the parking brake applied for vehicles with a manual transmission. The hazard lights will flash to confirm the vehicle is in Tire Fill Alert mode.

When entering Tire Fill Alert mode, the tire pressure display screen will be shown in the instrument cluster. If the hazard lights do not flash when inflating or deflating a tire, the TPMS sensor may be in a non-operational position, preventing the TPMS sensor signal from being received. In this case, the vehicle may need to be moved slightly forward or backward.

The horn will chirp to indicate the STFA status as the tires are inflated/deflated. The horn will chirp under the following STFA conditions:

1. 1
   The horn will chirp once when the selected pressure is reached, to notify you when to stop inflating or deflating the tire.
2. 2
   The horn will chirp three times if the tire is overinflated or underinflated.
3. 3
   The horn will chirp again when enough air has been added or removed to reach the proper selected pressure level.