This guide explains how to use VCDS (Vag-Com Diagnostic System) to switch from a direct to an indirect TPMS (Tire Pressure Monitoring System) on Volkswagen vehicles like the Golf and Jetta. This process allows you to deactivate the direct TPMS system and activate the indirect system, eliminating the need for tire pressure sensors.
Understanding TPMS Systems in VW Vehicles
Volkswagen uses two types of TPMS: direct and indirect. Direct TPMS utilizes sensors within each wheel to measure tire pressure and temperature, transmitting data to the car’s computer. Indirect TPMS relies on the ABS (Anti-lock Braking System) wheel speed sensors to detect changes in tire diameter, indicating potential pressure loss.
Indirect TPMS, reintroduced in models like the 2011 Golf and Jetta, offers advantages over the direct system. It eliminates the need for a second set of sensors for winter tires and avoids sensor battery replacement (direct TPMS sensor batteries last 6-9 years). More expensive models like the Touareg still use direct sensors.
Activating the Indirect TPMS with VCDS
Before starting, ensure you have a Ross-Tech VCDS cable and software, and a tire pressure gauge. This process involves modifying the car’s control modules using VCDS.
Warning: Disabling the TPMS warning light or the system itself may be illegal in your region. In the US, a functional TPMS is mandated by FMVSS 138. Consult local regulations before proceeding.
Steps to Activate Indirect TPMS:
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Connect VCDS: Plug in your VCDS cable and launch the software. Ensure the cable’s green LED is illuminated.
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Access ABS Controller: Select “Select” to access control modules, then choose “ABS Controller.”
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Access Long Coding Helper: Click “Coding,” then “Long Coding Helper.” Record your original coding before making changes.
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Modify Byte 16: Navigate to Byte 16 within the Long Coding Helper.
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Enable Indirect TPMS: Check the box for “Bit 2 – Tire pressure monitoring (TPMS/7K6) installed.”
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Save New Coding: Exit the Long Coding Helper. The modified code appears under “New Coding.” Click “Do it!” to save.
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System Adaptation: After turning on the ignition, the TPMS light should briefly illuminate. The system requires approximately one hour of driving, including highway driving, to adapt. TPMS functionality may be unreliable during this period.
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Reset TPMS (if necessary): If you lack a TPMS reset button, manually reset it within VCDS. Access the ABS module’s “Basic Settings,” go to “Group 042,” and click “Go!”
Disabling Direct TPMS (If Necessary)
Switching from a functioning direct to indirect TPMS may require disabling the direct system first. Refer to the warning above regarding the legality of disabling TPMS.
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Access CAN Gateway: In the module screen, click “CAN Gateway,” then “Long Coding,” and finally “Long Coding Helper.”
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Disable TPMS: Uncheck “Tire pressure monitoring” in the Long Coding Helper. Save the new coding.
This guide outlines the procedure for using VCDS to switch to indirect TPMS. Always consult your vehicle’s documentation and local regulations before making modifications to safety systems. Remember, a functioning TPMS enhances safety by alerting you to potential tire pressure issues.
