This document applies only to vehicle models equipped with a gateway (CCU).
✅ 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.
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