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Home >> Buick >> 2016 >> Envision >> Repair and Diagnosis >> External Pages >> Different car >> Section 199 (Object Detection System) >> Diagnostic Information and Procedures >> DTC B101D: Electronic Control Unit Hardware (with side blind zone alert, UFT) >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2016 Buick LaCrosse. However, it is still accessible from the selected car via links, so may be relevant.

The side blind zone alert system uses two modules: The side object sensor module - left and the side object sensor module - right. The side object sensor module - left is the master and communicates with other control modules in the vehicle via the vehicle-wide serial data bus. The side object sensor module - left communicates with the side object sensor module - right on a private serial data bus. Internal fault detection is performed within the side object sensor module - left. No external circuit diagnosis is involved.

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