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Home >> Cadillac >> 2011 >> STS AWD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Keyless Entry System And Remote Functions >> Diagnostic Information and Procedures >> DTC B3123 >> Circuit/System Description

Circuit/System Description

The console passive antennas is located in the center console and is used to establish low frequency (LF) communications with the keyless entry transmitter. The console antennas is used to determine transmitter placement within the vehicle. When a valid keyless entry transmitter is within the passenger compartment, the console antenna broadcasts a challenge within the passenger compartment to the transmitter. If the response from the transmitter via radio frequency (RF) is a valid response, the antenna will determine there is a fob within the vehicle. If no response is received, the antenna determines that no fob is in the vehicle.