Introduction

Subaru has recently issued recalls for 2019-20 Subaru Ascent Vehicles. The recall numbered WUU06 is made to resolve an issue with a C1424 DTC and also updates the vehicle's engine control unit (ECU) with their latest calibration.

Explanation from Subaru: "In some vehicles, the current software may cause the sub learning value control to operate improperly during the wake-up mode of the ECM. This could cause repeated erroneous learning of the accelerator position which can result in the disabling of the VDC function. When the VDC function is disabled, EyeSight, Reverse Automatic Braking (RAB), and Electronic Parking Brake (EPB) auto release functions are disabled by the VDC fail signal causing the VDC, EyeSight, RAB and EPB warning lamps to illuminate."

Frequently Asked Questions (FAQ)

Which vehicles are part of Subaru's recall?

Only cars within a specific production date range are included in this recall. You can check if your car is part of Subaru's recall by entering your VIN on the following Subaru page:

http://www.subaru.com/vehicle-recalls.html

I've been running an Accessport with one of the above vehicles. Why is Subaru's recall important?

Any factory ECU tuning solution, including the Accessport, uses the factory calibration and logic as a base and improves upon that. Depending on when and how the map was created, its base ECU may be one that is part of Subaru's current recall. We are recommending that all our customers with the above vehicles upgrade to revised maps outside of the recall range.

I've been running a COBB off-the-shelf (OTS) map with one of the above vehicles. What do I need to do?

When convenient we suggest having a Subaru dealership perform their recall process. *Make certain to uninstall the Accessport prior to having the dealer perform the recall. Update your Accessport using our Accessport Manager software, then after the dealer completes the recall, you can reinstall the Accessport.

If you've not yet had the recall performed, but would like the benefits of Subaru's recall updates right away, you can update your Accessport firmware, then flash the appropriate revised calibration to your vehicle. OTS maps with the Subaru recall updates are labelled version v110 or higher.

What Maps Should I Use Afterward?

We have created updated maps using the new code that should end with the revision number of v110 or later.
Update your Accessport to the latest firmware version 1.7.2.0-12082 using the Accessport Manager software. Once on the latest version of Accessport firmware, you will have the latest maps loaded to your Accessport to be flashed to your car.

I am running a custom tune from a COBB Protuner with one of the above vehicles. What do I need to do?

Contact your Protuner and they can update your calibration by opening and re-saving it.

How do I update a custom tune (Protuner)

If you are the original creator of the map, using software version 1.7.2.0-12082 or later you will need to compare and import the changes into the new Post-recall 1 ECU variant.

If I tune in the latest Accesstuner software, are any of the ECUs still based on a recalled ECU?

No, the newest software will only allow you to utilize ROMs with the changes made in the recall.

I've sent my customer an updated map but the map is grayed out when they go to select it. What is causing this?

Short of sending them the wrong map for their ECU, it is likely that your customer did not update their Accessport to the latest firmware version. This is required in order for the Accessport to recognize a map created in one of the new ECU revisions.

I own an Ascent but my car is not included in Subaru's recall. Should I still update my Accessport maps and reflash my car?

Yes. Even though you are not part of the recall, you can still be impacted. It's always best to stay up to date with firmware and map updates to ensure you have the most up-to-date fixes, features and driveability.

Now that I have an updated map, how do I install it?

Update your Accessport to the latest firmware version 1.7.2.0-12082 using the Accessport Manager software.
With the Accessport connected to the car, use the Tune → Change Map function to install the appropriate upgraded map to your car's ECU. It is absolutely critical that you choose the REFLASH option during this process. The REALTIME option will not upgrade the ECU with the full changes.

I'm attempting to install an updated map but the map is grayed out when I go to select it. What is causing this?

Short of using the wrong map for your ECU, it is likely that you did not update your Accessport to the latest firmware version. This is required in order for the Accessport to recognize a map created in one of the new ECU revisions.

Is it possible to have the Subaru dealer perform their recall with my Accessport still installed?

No, the dealership will not be able to perform their ECU update when the Accessport is installed, even if you use the latest Accessport map that matches what they install. You will need to fully uninstall the Accessport by connecting to the car and selecting the Uninstall menu option and completing that process. WARNING: Changing maps to a "stage 0" stock mode map (or any other map) will NOT allow the dealership to perform the recall update - you must use the Uninstall option only. Keep in mind the uninstall procedure places an OEM tune on the vehicle. If your car is mechanically modified, you may need to return the car to a mechanically stock configuration to drive safely on the factory tune.

If the Subaru dealer performs the recall on my car, do I still need an updated map when I re-install the Accessport?

Yes, you'll still need to update your Accessport firmware and reflash the car with a v110 or newer map file (or an updated custom tune from your Protuner).

If I install an Accessport map with the fix, do I still need to get the Subaru recall done?

As long as the Accessport is installed and a post recall tune is flashed on the vehicle, your vehicle has this particular recall update applied. However, upon uninstalling an Accessport map it will revert to the non-recalled ROM which could cause issues for you or a later buyer. You may also want to get the recall done from Subaru so there is a record that the recall has been performed. Some states and counties require that all recalls be satisfied before a vehicle's registration can be renewed.

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