[KDS 2.0 Additional Functions] Guide for Persistent ABS/ESP/EBD Variant Coding Failures on Vehicles Equipped with a CCU

✅ Issue Overview

• Applicable vehicles: Vehicles equipped with a gateway (CCU) where ABS/ESP Variant Coding continues to fail even though all test conditions have been met
• Symptom: ABS/ESP Variant Coding continues to fail even though all test conditions have been met

• 

• Characteristics
  • This issue may occur after replacing the ABS/ESP control unit with a new unit having the same part number as the original control unit.
  • It may also occur if the vehicle's CCU incorrectly recognizes the GPS-based date information from the navigation system.
  • A negative response may occur due to an expired certificate or a time mismatch.

🔍 Cause Analysis

• Gateway (CCU) communication and authentication logic issue
  • Certificate validation may fail if the vehicle's navigation-based GPS location/date is recognized as being in the future.
• Security certificate status
  • The validity periods of the certificate and CRL must be checked.
• Environmental conditions
  • GPS information may not update when work is performed indoors, increasing the likelihood of a Variant Coding failure.

🛠 Corrective Actions

1. On-Site Actions

• Sign in again and retry: If the security certificate has expired, sign in again to renew the security certificate.
• Update the vehicle's GPS information : Move the vehicle outdoors, then update the GPS information and set the time zone to the local time zone.
• Check the tablet time zone: Refer to https://support-kia.gitauto.com/hc/en-gb/articles/54047285143705 and set the tablet to the local time zone.

2. Request for Technical Action (Contact Customer Support for this action.)

• Inspect the security certificate: Delete the certificate (.bat) file from the nvci/xml/hy path, then redeploy it.