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Home >> GMC >> 2007 >> Acadia SLE, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 405 (Keyless Entry System And Remote Functions) >> Diagnostic Information and Procedures >> DTC B3120 >> Circuit Description

Circuit Description

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

The keyless entry antenna - right is located in the right hand B-pillar area and is used as a short range low frequency (LF) transmitter. As a vehicle with locked doors is approached with a key fob and the exterior door handle switch is pressed, the keyless entry antenna transmitter broadcasts a challenge to the key fob in approximately a 1 meter range. If the response from the key fob via radio frequency (RF) is valid, then the locked door will be passively unlocked/unlatched and allow the door to be opened.

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