B3123
DTC B3123
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B3123 00
- Keyless Entry Antenna 5 Performance - Console Passive Antenna
Diagnostic Fault Information
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.
Conditions for Running the DTC
A transmitter validation is requested.
Conditions for Setting the DTC
An improper current level is seen on the keyless entry antenna - signal (2) circuit.
Action Taken When the DTC Sets
No action is taken.
Conditions for Clearing the DTC
* A current DTC will clear when the conditions for setting the DTC are no longer present.
* A history DTC will clear after 50 malfunction free ignition cycles.
Reference Information
Schematic Reference
Remote Function Schematics (Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Keyless Entry System Description and Operation (Description and Operation)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the console passive antenna.
2. Place a valid keyless entry transmitter in the pocket located in the center console. This will allow the console active antenna to authenticate the keyless entry transmitter and allow the ignition to be turned on.
3. Ignition ON, verify a test lamp does not illuminate between the signal circuit terminal A and ground.
• If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuit tests normal, replace the RCDLR.
4. Connect a DMM, set to capture AC voltage using the MIN MAX function, between the signal circuit terminal A and the low reference circuit terminal B.
5. Attempt to start the vehicle. Verify the DMM captured an AC voltage signal.
• If an AC voltage was not captured, test the signal circuit and the low reference circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the RCDLR.
6. If all circuits test normal, test or replace the console passive antenna.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Ignition Lock Key Transmitter Antenna Replacement - Floor Console (Rear) (Ignition Lock Key Transmitter Antenna Replacement - Floor Console (Rear))Ignition Lock Key Transmitter Antenna Replacement - Floor Console (Cup Holder) (Ignition Lock Key Transmitter Antenna Replacement - Floor Console (Cup Holder))
* Control Module References (Programming and Relearning) for RCDLR replacement, setup, and programming