Enabling the Tire Pressure Monitoring System (TPMS) on a 2019 Jetta GLI can be challenging. This guide outlines a VCDS user’s attempt to activate TPMS on their vehicle in Uruguay and the issues encountered. The user successfully modified the ESC mode but faced difficulties enabling the TPMS using common adaptation methods. This article explores the steps taken, the resulting error, and provides the vehicle’s autoscan data for analysis.
Understanding the TPMS Activation Process
The owner attempted to enable TPMS on a 2019 Jetta GLI using VCDS (Ross-Tech’s VAG-COM Diagnostic System) by modifying specific bytes and bits within the ABS module and adapting various settings in the 5F – Information Electr. module. The typical modifications involved:
- 03-ABS: Adjustments to byte 27 (bit 4,5) and byte 28 (bit 7).
- 5F-Adapt:
- Setting “BAP-tire_pressure_system_0x07” to “activated.”
- Setting “BAP-tire_pressure_system_0x07_msg_bus” to “Suspension data bus.”
- Activating “Vehicle menu operation-menu_display_rdk” and “Vehicle menu operation-menu_display_rdk_over_threshold_high.”
- 17-Instr: Enabling bit 0 in byte 4 of the coding (“Indirect Tire Pressure Monitoring System (TPMS)”).
While these changes successfully enabled the TPMS display on the car’s infotainment screen, an error message persisted, indicating an incomplete activation process. The suspicion is that further configurations within the ABS module are required.
Analyzing the Autoscan Data
An autoscan of the vehicle was performed using VCDS 20.4.1.0. Noteworthy points from the scan include:
- Missing Module 01: The autoscan did not include module 01 (Engine), which may contain crucial information related to TPMS functionality.
- 03 – ABS Brakes (J104): No fault codes were found in the ABS module, despite the TPMS error on the display. This suggests the issue might be a configuration problem rather than a hardware fault.
- 5F – Information Electr. (J794): A fault code “7175 – Function Restricted due to Missing Message(s) U1111 00 [009]” was logged. This error points to a communication issue potentially related to the TPMS module (0x07) and suggests the system is not receiving the necessary data.
Potential Solutions and Further Steps
Based on the information provided, several potential solutions and further steps can be explored:
- Rescan with Module 01: Perform a complete autoscan including module 01 (Engine) to gather comprehensive data.
- Verify ABS Coding: Double-check the coding for the ABS module against factory specifications for a 2019 Jetta GLI with factory-installed TPMS. Discrepancies in the coding could be the source of the error.
- Check Measuring Value Blocks (MVB): Within the ABS module, examine the MVBs related to wheel speed and tire pressure. This can help determine if the sensors are being detected and transmitting data.
- Consult Ross-Tech’s Wiki: Ross-Tech, the creators of VCDS, maintain a comprehensive wiki with detailed information on various VAG models and coding procedures. Searching for “Jetta MK7 TPMS” or “VCDS TPMS” could provide valuable insights.
Conclusion
Successfully enabling TPMS on a 2019 Jetta GLI using VCDS requires careful attention to detail and potentially further diagnostics. The error message on the display, coupled with the fault code in the 5F module, indicates a communication problem that needs to be addressed. Obtaining a complete autoscan including module 01 and consulting resources like the Ross-Tech wiki are crucial next steps in resolving this issue.
