Does Subaru use indirect TPMS?
As a seasoned auto service provider, I often encounter questions about various vehicle technologies, including tire pressure monitoring systems (TPMS). One common inquiry is whether Subaru vehicles utilize indirect TPMS. In this article, we will explore what indirect TPMS is, how it functions, and its application in Subaru vehicles.
Understanding Indirect TPMS
Indirect TPMS is a system that monitors tire pressure indirectly through the vehicle's anti-lock braking system (ABS) sensors. Instead of using dedicated pressure sensors in each tire, it calculates tire pressure based on the rotational speed of the tires. If a tire is under-inflated, it will rotate at a different speed compared to properly inflated tires, triggering a warning light on the dashboard.
Subaru's Approach to TPMS
Subaru has implemented both direct and indirect TPMS in its vehicles over the years. The specific type of TPMS used can vary depending on the model and year. Here’s a breakdown:
- Direct TPMS: Many newer Subaru models are equipped with direct TPMS, which uses sensors in each tire to provide real-time pressure readings.
- Indirect TPMS: Some older Subaru models, particularly those produced before the widespread adoption of direct TPMS, utilize the indirect method. This system is less expensive and simpler but does not provide real-time pressure readings.
Benefits and Limitations of Indirect TPMS
While indirect TPMS can be a cost-effective solution, it does come with certain limitations:
- Benefits:
- Lower cost of implementation compared to direct TPMS.
- Less maintenance required since there are no sensors to replace.
- Limitations:
- Does not provide precise tire pressure readings.
- May not detect slow leaks as effectively as direct TPMS.
Conclusion
In summary, Subaru vehicles may use either indirect or direct TPMS depending on the model and year. While indirect TPMS is a viable option for monitoring tire pressure, it is essential for drivers to regularly check their tire pressure manually to ensure safety and optimal vehicle performance. If you have further questions about your Subaru's TPMS or need assistance with tire maintenance, feel free to reach out to us at Kevin's Autos!
Frequently Asked Questions
Why is my tire pressure light still on after filling tires on my Subaru?
If your tire pressure light persists even after diligent inflation, it might be time for a reset. This guide outlines the essential steps to reset your TPMS light on and restore your TPMS functionality.
What are the 2 types of TPMS systems?
There are two different types of tire pressure monitoring systems:
- Indirect TPMS: Indirect TPMS measure air pressure with software-based systems rather than physical sensors.
- Direct TPMS: Direct TPMS measures tire pressure using waterproof hardware sensors located in each tire (or on the valve stem).
What is the disadvantage of indirect TPMS?
Because of the absence of pressure sensors, a vehicle equipped with indirect TPMS requires the device to be recalibrated by the driver after tire pressure is modified or a tire is changed.
What type of TPMS does Subaru use?
A TPMS from Schrader Electronics is fitted as part of the valve assembly in all Subaru cars according to the table shown below. The sensor measures the pressure and temperature in the tire and transmits this data along with the unique ID of the TPMS to the tire pressure monitor ECU/receiver.
Is Subaru AWD always engaged?
Improved Traction: Subaru's AWD system is always engaged, ensuring power is sent to the wheels with the most grip. This results in improved traction on icy and snowy roads, reducing the likelihood of slipping or getting stuck.
What is the TPMS problem on a Subaru?
The TPMS light indicates that one or more of your tires on your Subaru is low on pressure. This might be a result of a puncture or a leak, or it could just the result of a big swing in the outside temperature.
What is the life expectancy of a Subaru TPMS sensor?
TPMS Life Expectancy
The estimated life expectancy of an OE TPMS sensor is 5 to 12 years, with the average lifespan being 7 years. TPMS life expectancy is directly related to the number of radio frequency transmissions the sensors make.
Is Subaru TPMS direct or indirect?
The Subaru Crosstrek is manufactured with a direct TPMS system, which means TPMS sensors are installed in the wheel.
How do I know if my TPMS are direct or indirect?
Direct TPMS gathers accurate pressure data directly from the tire valve via four dedicated sensors, reporting pressure information in near real time. Indirect TPMS, on the other hand, uses the ABS system to approximate tire pressure, and motorists must drive a substantial distance before an alert will be generated.
What vehicles use indirect TPMS?
Certain vehicles utilize indirect TPMS systems instead of direct ones. Examples of manufacturers that use indirect prominently are Honda and Volkswagen. Since the systems measure tire pressure indirectly, there's no sensors inside the wheels. Instead the vehicles use the data from the ABS sensors inside each wheel hub.
