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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 189 (Data Communications - Diagnostic Information And Procedures (1 Of 3)) >> Diagnostic Information and Procedures >> DTC B1A11 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

The Ethernet bus 15 is used to communicate between K56 Serial Data Gateway Module and K161 Vehicle Performance Data Recorder. This Ethernet harness consists of a single twisted copper pair of wires (circuits 7232 & 7233) from point to point.

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