Error code occurred during ECU upgrade (5021-34-7F31)

Written by Oscar

Symptom
During an ECU upgrade, the command that specifies the upgrade address and size receives a negative response 31 from the ECU, resulting in a failed upgrade.

Cause
The response code 31 (Request Out of Range) indicates that the request was made using a format or range that is incompatible with the ECU specifications. This usually occurs when software not intended for that ECU is used.

Solution
Check that the software is suitable for the specific ECU model and within the supported parameters. Retry the upgrade using software that matches the ECU's specification.

Further Resource
🔧 What to Do When ECU Upgrade Fails
📤 How to Send the Error Log Report on KDS 2.0/KDS2.0
📁 How to Get ECU Logs from Your Tablet on KDS 2.0/KDS2.0

For Additional Enquiries, Please Visit: