[KDS 2.0 Additional Functions] Troubleshooting Guide for Repeated ABS/ESP/EBD Variant Coding Failures on CCU-Equipped Vehicles

✅ Issue Overview

• Applicable vehicles: Vehicles equipped with a gateway (CCU) for which Variant Coding continues to fail even though all ABS/ESP Variant Coding 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 when the vehicle's CCU incorrectly recognizes GPS (navigation)-based date information.
  • 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 later than the current date.
• Security certificate status
  • Check the validity periods of the certificate and CRL.
• Environmental conditions
  • When work is performed indoors, GPS information may not update, increasing the likelihood of a Variant Coding failure.

🛠 Corrective Actions

1. On-Site Actions

• Log in again and retry: If the security certificate has expired, log in again to renew the security certificate, and then retry.
• Update the vehicle's GPS information: Move the vehicle outdoors and allow the GPS information and time zone to update to the local time.
• 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 the Customer Support Team for this action.)

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