Conditions for Setting the DTC
WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
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The DTC will set when the DRR detects a short to ground in the antenna ground circuit.
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The DTC will set when the DRR detects a short to voltage or an open/high resistance in the antenna ground circuit.