BYD Atto 3 Tire Pressure Monitoring System
The BYD Atto 3 employs a direct system for monitoring tire pressure. In this system, each wheel is equipped with a tire sensor that continuously measures and relays the actual tire pressures to the driver’s information display screen.
How Does the BYD Atto 3 Tire Pressure System Work?
BYD Atto 3 Tire Pressure Sensors
Each tire of the BYD Atto 3 contains a tire pressure sensor enclosed in a plastic casing, which includes a chip, a battery, and a radio transmitter, along with an attached valve stem. The chip, powered by the battery, measures the air pressure within the tire, and this data is then transmitted to the Atto 3’s Tire Pressure Monitoring System (TPMS) receiver module through radio waves (either 315 mHz or 433 mHz).
BYD Atto 3 TPMS Receiver Module
The Tire Pressure Monitoring System (TPMS) receiver module in the BYD Atto 3 gathers air pressure readings from the sensors in each tire. This information is then relayed to the car’s main control unit, known as the Engine Control Unit (ECU), the Engine Control Module (ECM) or Body Control Module (BCM).
BYD Atto 3 ECU
In the BYD Atto 3, the central control unit evaluates the tire pressure data it receives and checks it against the air pressure standards set by BYD. Should the Engine Control Unit (ECU) detect that a tire’s pressure has fallen 20% or more than the advised 250 kPa (36 psi), it activates an alert for low tire pressure on the information display screen.
Steps to Reset BYD Atto 3 Tire Pressure Light
Inflate all 4 BYD Atto 3 tires to 250 kPa/36 Psi.
Select the INFO button on the top of the information display screen.
Select STATUS.
Select RESET next to “Tyre Pressure”.
Drive the BYD Atto 3 for 10 minutes at speeds exceeding 30 Kph (19 mph).
Steps to Access the Tire Pressure on the Instrument Cluster
Press the MENU button on the steering wheel.
Use the Left and Right arrow buttons on the steering wheel to navigate to the DRIVING INFORMATION bar.
Use the Right arrow button and select Tire Pressure using the roller button on the steering wheel.
BYD Atto 3 Tire Pressure Alerts
LOW TIRE PRESSURE
The display monitor will change the tire pressure value to yellow and the tire pressure fault warning light will turn on.
ABNORMAL SIGNAL
The tire pressure value display on the monitor will change to “Abnormal Signal” and the tire pressure fault warning light will flash and then stay on.
SYSTEM FAILURE
A message will appear that reads “Check tire pressure monitoring system” and the low tire pressure light will flash and then stay on until the issue is resolved.
byd aTTO 3 tpms fEATURES
Anytime any tire is below 200 kPa or 29 Psi (80% of 250 kPa/36 Psi), the tire pressure fault warning will turn on and the tire pressure value on the display screen will change to yellow.
The BYD tire pressure alarm will turn off when the tire pressure is above 95% the standard tire pressure.
When the BYD Atto 3 is on, if any tire is leaking air pressure above a specific rate set by BYD, the TPMS will give a “fast air leakage alarm” within 15 seconds and show which tire is losing air.
The BYD Atto 3 TPMS operates normally once the vehicle is being driven above 30 kph.
If any tire temperature exceeds 85 degrees celsius for more than 3 minutes, the BYD Atto 3 will display a High Temperature alarm. This will cause the tire pressure value on the display screen to Yellow. Pull over and wait for the tire to cool down before driving.
Why is the BYD Atto 3 Tire Pressure Fault Warning Light Flashing?
When the tire pressure indicator on the BYD Atto 3 blinks, it signifies a fault in the tire pressure monitoring system (TPMS). Such malfunctions typically occur if one or more tire pressure sensors fail to communicate with the car’s TPMS module or the Engine Control Unit/Module (ECU/ECM) or Body Control Module (BCM). Generally, this can happen due to one of the following reasons:
The battery of a tire pressure sensor is depleted or running low, necessitating its replacement.
A sensor might have been damaged during the fitting of new tires or wheels.
External radio frequency disruptions from other vehicles or electronic devices could be affecting the sensors or the TPMS module.
Non-standard, non-BYD approved tire pressure sensors or TPMS modules have been installed in the BYD Atto 3.
What Can Cause the BYD Atto Low Tire Light to Turn On?
Tire pressure that is either too high or too low.
TPMS sensors running out of battery or not functioning correctly.
Problems with the TPMS receiver or the vehicle’s Engine Control Unit/Module (ECU/ECM) or Body Control Module (BCM), such as software issues.
Electromagnetic interference from nearby vehicles or electronic devices.
Sudden changes in the air temperature.
Overloading the vehicle beyond its weight capacity or towing more than its specified limit.
Fitting tire chains onto the vehicle’s tires.
Excessively dark tinting on the vehicle’s windows.
Temperature fluctuations of the road surface.
Damage to the TPMS sensors during tire changes or other maintenance work.
Skipping the TPMS reset procedure after inflating or servicing the tires on the BYD Atto 3.
Physical damage to tires or wheels, such as tire punctures, bulges or cracked rims.
Valve stems on the tires that are either incorrectly fitted or faulty.
How Does the Weather Trigger the Low Tire Light?
The BYD Atto 3’s low tire pressure warning is frequently triggered by changes in weather conditions. This is because tire pressure fluctuates by about 1 psi with every 10°F change in the ambient temperature. For instance, if the temperature drops by 45°F within a month, the tire pressure could fall from 36 Psi to 30 Psi or less, potentially activating the Atto 3’s low tire pressure warning light.
BYD Atto 3 Tire Inflation
UNDERINFLATION
Driving on underinflated tires can lead to reduced battery range, increased tire tread wear on the outside of the tires tread, and compromised handling and safety of the BYD Atto 3.
OVERINFLATION
Driving the BYD with overinflated tires can result in a rough driving experience and lead to the tire’s tread wearing down more in the center than evenly across its surface.
COLD TIRES
The tire pressure of the BYD Atto 3 should be checked and adjusted when the tires are cold, typically before the car has been driven or after waiting a minimum of 3 hours since its last use.
WARM TIRES
After driving your BYD, the tires heat up and the air pressure tends to rise by approximately 30-40 kPa (4-5 psi). Therefore, adjusting the tire pressure while the tires are hot could result in overinflation.
byd aTTO 3 tIRE pRESSURE
hOW dOES tIRE pRESSURE aFFECT byd bATTERY rANGE?
When tires are under-inflated, they create more rolling resistance, requiring the BYD Atto 3’s electric motor to use additional energy, which in turn diminishes the vehicle’s total range. Maintaining the tires at the advised pressure level (36psi/250 kPa) is essential not only for optimizing the battery range of the Atto 3 EV but also for ensuring steady vehicle operation and extending tire life. A mere 10% drop in tire pressure can result in a 3% reduction in the vehicle’s battery range.
hOW TO sPOT A lEAKING tIRE
Pump up the tire with a leak to 40 Psi.
Prepare a solution of water and liquid soap in a spray bottle.
Liberally apply this soap solution across the whole tire, without forgetting the bead area and the valve stem.
Watch for bubbles to form and trace them back to their source to accurately identify where the leak is.
TPMS Diagnostic & Programming Tools
If you’ve correctly set the tire pressure for all tires and have completed the BYD Atto 3 TPMS reset process, but the tire pressure light remains on or flashes before staying lit, it’s time to use a TPMS diagnostic tool for troubleshooting the problem. These tools are highly effective in detecting and pinpointing issues with tire pressure sensors. They can assess each sensor, offering comprehensive feedback on various parameters like battery condition, signal strength, tire temperature, the sensor’s frequency in megahertz, and its exact location on the vehicle. When the TPMS sensors indicate low battery life or weak signal strength, it’s advisable to replace these sensors.
BYD Atto 3 Tire Tips
Rotate your tires approximately every 10,000 km (6,000 miles).
Avoid using different brands or sizes of tires together.
Replace all four tires simultaneously.
After applying BYD tire sealant to a leaking tire, promptly get the tire and its pressure sensor inspected.
Fitting the BYD Atto 3 with tires or wheels of varying sizes can impair the ABS and electronic stability control systems.
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