Comprehensive Guide: How to Bypass TPMS Sensor

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Tire Pressure Monitoring Systems (TPMS) are designed to alert drivers when their vehicle’s tire pressure falls below a certain threshold, but sometimes, you may want to bypass this system, especially when airing down your tires for off-road adventures or when the TPMS sensor malfunctions. In this comprehensive guide, we’ll explore two effective methods to bypass the TPMS sensor and provide you with the technical details to ensure a successful DIY project.

Creating a Pressurized TPMS Sensor Container

One of the most popular methods to bypass the TPMS sensor is to create a portable pressurized container for the sensor. This approach fools the system into thinking the TPMS is still in the tires, preventing the low tire pressure warning light from illuminating.

Materials Needed

  • 6″ length of 4″ PVC pipe
  • 2 PVC pipe endcaps
  • TPMS sensor synced to your vehicle’s computer

Step-by-Step Instructions

  1. Drill the Endcap: Using a drill bit slightly smaller than the TPMS sensor, create a hole in the center of one of the PVC pipe endcaps. The hole should be a snug and airtight fit for the sensor.
  2. Clean the Hole: Carefully remove any burrs or debris from the hole to ensure a smooth, clean surface for the TPMS sensor.
  3. Insert the Sensor: Gently pull the TPMS sensor through the hole in the endcap, ensuring it fits securely and does not move.
  4. Glue the Endcaps: Apply PVC glue to the inside of the PVC pipe and the outer edges of the endcaps. Quickly press the endcaps onto the pipe, creating an airtight seal.
  5. Inflate the Capsule: Using a tire inflator or air compressor, inflate the pressurized capsule to the recommended PSI for your vehicle’s TPMS system. This is typically between 30-35 PSI.
  6. Secure the Capsule: Place the pressurized capsule in a safe location within your vehicle, such as the trunk or behind the rear seats, ensuring it remains in contact with the TPMS monitor.

Technical Specifications

  • PVC Pipe Diameter: 4 inches
  • PVC Pipe Length: 6 inches
  • Recommended Inflation Pressure: 30-35 PSI
  • Airtight Seal: Achieved through the use of PVC glue and a snug fit for the TPMS sensor

This DIY TPMS bypass method creates a self-contained, pressurized environment for the sensor, effectively tricking the system into thinking the TPMS is still functioning correctly, even when you air down your tires for off-road use.

Disabling TPMS Through Module Settings

how to bypass tpms sensor

For those who prefer a more technical approach, you can disable the TPMS system directly through the vehicle’s module settings. This method is particularly useful for Volkswagen and Chrysler Crossfire owners.

Disabling TPMS on Volkswagen Vehicles

  1. Connect to VAGCOM: Use a VAGCOM (VAG-COM) diagnostic tool to connect to your Volkswagen’s on-board computer.
  2. Navigate to Module 65 – TPMS: In the VAGCOM interface, locate and select module 65, which is responsible for the Tire Pressure Monitoring System.
  3. Adapt Channel 2: In the adaptation menu, find channel 2 and change the value from “1” to “2”. This will disable the TPMS system.
  4. Disable TPMS in Module 19: Next, navigate to module 19 – CAN Gateway. In the coding menu, locate the “long coding helper” and find the last box, which is labeled “TPMS”. Uncheck this box to completely disable the TPMS system.

Disabling TPMS on Chrysler Crossfire

  1. Locate the TPMS Wiring: In the Chrysler Crossfire, the TPMS wiring is located in the instrument cluster. Specifically, you’ll need to access the wiring harness behind the instrument panel.
  2. Identify the Wires: Locate the red wire in pin 2 and the blue wire in pin 6 of the TPMS wiring harness.
  3. Swap the Wires: Carefully remove the red wire from pin 2 and place it in the empty space of pin 6 (blue). This will completely disable the TPMS system, and the low tire pressure warning light will no longer illuminate on the instrument cluster.

Technical Specifications

  • Volkswagen TPMS Disabling:
  • Module 65 – TPMS, Adaptation Channel 2: Change value from “1” to “2”
  • Module 19 – CAN Gateway, Long Coding Helper: Uncheck “TPMS” box
  • Chrysler Crossfire TPMS Disabling:
  • Remove red wire from pin 2 and place it in the empty space of pin 6 (blue)

These module-level modifications allow you to completely disable the TPMS system, eliminating the low tire pressure warning light and providing you with the freedom to air down your tires as needed.

Conclusion

Bypassing the TPMS sensor can be a valuable skill for off-road enthusiasts, those experiencing TPMS sensor malfunctions, or anyone who simply wants to disable the low tire pressure warning light. By following the detailed instructions and technical specifications provided in this guide, you can successfully create a pressurized TPMS sensor container or disable the system through module settings, depending on your vehicle and preferences.

Remember to always exercise caution when working on your vehicle’s electrical systems and consult with a professional if you’re unsure about any of the steps involved. Happy and safe off-roading!

References