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