B3120

DTC B3120

Circuit Description
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 one-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.

Conditions for Setting the DTC
The Remote Control Door Lock Receiver (RCDLR) will set this DTC during antenna activation if the Keyless Entry Antenna-Right is open, shorted to battery or shorted to ground and an authentication occurs. The (RCDLR) can only set a DTC when the vehicle system voltage is between 9-16 volts.

Action Taken When the DTC Sets
The Remote Control Door Lock Receiver (RCDLR) will set and store a DTC B3120.

Conditions for Clearing the DTC
^ The Remote Control Door Lock Receiver (RCDLR) no longer detects an open, short to power or short to ground on the antenna circuit.
^ The use of a scan tool.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
2. Verifies that DTC B3120 is a current DTC.
3. Testing for power and ground to the Keyless Entry Antenna.