Newer Subaru models are known to encounter issues with their Variable Valve Timing (VVT) systems, often storing data in the EEPROM that cannot be cleared through conventional methods. Traditionally, the Subaru Technical Service Bulletin (TSB) 02-163-16r suggests that replacing the Engine Control Module (ECM) is necessary to resolve this problem. This approach can be costly and time-consuming, leading many technicians and Subaru owners to seek alternative solutions.
Fortunately, a more efficient and cost-effective method has emerged, eliminating the need for ECM replacement or intricate EEPROM work for a 2014 Subaru A T Relearn Without Scan Tool replacement of the ECM. This innovative procedure leverages the vehicle’s inspection mode in conjunction with a scan tool to reset the VVT system data. This method has been successfully tested and verified on various Subaru models, including those from 2015, 2016, and 2019, demonstrating its broad applicability across recent Subaru model years.
Step-by-Step Guide to Resetting Subaru AT Relearn
This process allows for a 2014 subaru a t relearn without scan tool ECM replacement, saving both time and money. Here’s how to perform the reset:
-
Initiate Inspection Mode: Begin with the vehicle’s ignition turned off. Locate the inspection mode fuse location in the underhood fuse panel. This location can vary depending on the specific year and model of your Subaru, so consulting the service information for your vehicle is crucial. Install a fuse in the designated inspection mode slot.
-
Turn Ignition On: After installing the inspection fuse, turn the ignition key to the ‘On’ position. It’s normal to hear the cooling fans start cycling at this stage. This indicates that the vehicle has entered inspection mode.
-
Connect Scan Tool: Utilize a professional-grade scan tool such as Launch or Autel (other compatible scan tools may also work). Connect the scan tool to the vehicle’s ECM.
-
Access Special Functions: Navigate to the ‘Special Functions’ menu within your scan tool interface once connected to the ECM.
-
Enter Test Mode: Look for an option within the special functions menu to change or activate ‘Test Mode’. Select this option. Upon activation, the check engine light on the dashboard should begin to flash. This confirms that the vehicle is now in test mode, which is essential for the next step.
-
Clear Diagnostic Trouble Codes (DTCs): While still in test mode (with the check engine light flashing), go back to the main menu of your scan tool and select the function to clear diagnostic trouble codes. Clear all DTCs present in the system.
-
Exit Inspection and Test Modes: Turn the ignition key to the ‘Off’ position. Remove the inspection fuse from the underhood fuse panel.
-
Verify Reset: Turn the ignition key back to the ‘On’ position. Use your scan tool to verify that the VVT system values have been successfully reset. Check for any remaining DTCs and confirm that the check engine light is no longer flashing or illuminated due to the VVT system issue.
This procedure effectively resets the relearned values in the VVT system, resolving issues without the need for an ECM replacement. This method provides a significant advantage for technicians and DIYers working on 2014 subaru a t relearn without scan tool ECM replacement scenarios, offering a quicker and more economical solution.
Conclusion
This scan tool-based method offers a practical alternative to ECM replacement for resetting the VVT system on newer Subarus. By utilizing the inspection mode and a scan tool, technicians can efficiently clear the stored data and resolve VVT related issues, saving considerable time and expense. This procedure has been validated on multiple Subaru models, making it a reliable solution for addressing VVT system relearn problems and for performing a 2014 subaru a t relearn without scan tool ECM replacement, but rather using a scan tool for reset. For a visual demonstration of this process, refer to the video resource available at youtu.be/aR6fHMxlZgU.
