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Home >> GMC >> 2007 >> Acadia SLE, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 317 (Keyless Entry System And Remote Functions) >> Diagnostic Information and Procedures >> DTC B3121 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2007 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

The keyless entry antenna - rear compartment is located in the rear compartment area and is used as a short range low frequency (LF) antenna. As a vehicle with a closed rear compartment lid is approached with a keyless entry transmitter and the exterior rear compartment lid release pad is pressed, the keyless entry antenna broadcasts a challenge to the transmitter in an approximate 1 meter range. If the response from the transmitter via radio frequency (RF) is valid, the latched rear compartment will be passively unlatched, allowing the rear compartment lid to be opened.

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