B3122

DTC B3122

Circuit Description

The console active antenna is located in the center console and is used as a short range low frequency (LF) antenna. The keyless entry console active antenna is only used when a keyless entry transmitter battery is low or there is a interruption with the frequency transmission of the passive antennas located in the console and headliner. When a valid transmitter is placed into the fob pocket, the brake pedal is depressed, and the ignition button is pressed, the console active antenna broadcasts a challenge to the transmitter. This causes a low frequency coupling to occur between the transmitter and the console active antenna. If the response from the transmitter is a valid response, and all of the security requirements are met, the vehicle's engine will start, or be allowed to go into accessory mode.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B3122 Keyless Entry Antenna 4 Performance






Conditions for Setting the DTC

The remote control door lock receiver (RCDLR) will set this DTC during antenna activation if the circuits involved with the console active antenna's operation is open, shorted to battery, or shorted to ground. The RCDLR can only set a DTC when the vehicle system voltage is between 9-16 volts.

Action Taken When the DTC Sets

The RCDLR will set and store a DTC B3122.

Conditions for Clearing the DTC

* The RCDLR no longer detects an open, a short to power, or a short to ground.
* The use of a scan tool

Test Description

Step 1 - Step 8:

Step 9 - Step 15:

The numbers below refer to the step numbers on the diagnostic table.
2. This step verifies that proper operation of the keyless entry console active antenna