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DTC B3124

DTC B3124

Diagnostic Instructions


• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• Diagnostic Procedure Instructions provides an overview of each diagnostic category.


DTC Descriptors

DTC B3124 02

Keyless Entry Antenna 6 Short to Ground

DTC B3124 05

Keyless Entry Antenna 6 High Voltage/Open

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Keyless Entry Antenna - Rear Compartment Signal

B3124 02

B3124 05

B3124 05

-

Keyless Entry Antenna - Rear Compartment Low Reference

-

B3124 05

-

-



Circuit/System Description

The antenna is located on the cross bar of the trunk and is used to establish low frequency communications with the keyless entry transmitter. This antenna will prevent the user identification device from being locked in the rear compartment of the vehicle.

Conditions for Running the DTC

The handle or touch pad used to open the rear closure is activated.

Conditions for Setting the DTC

B3124 02

The keyless entry control module detects a short to ground on the trunk keyless entry antenna circuit.

B3124 05

The keyless entry control module detects a short to B+ or an open on the trunk keyless entry antenna circuit.

Action Taken When the DTC Sets

The handle or touch pad used to open the rear closure is activated.

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 40 malfunction-free ignition cycles.


Reference Information

Schematic Reference

Remote Function Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Keyless Entry System Description and Operation (With ATH) Keyless Entry System Description and Operation (Without ATH)

Electrical Information Reference


• Circuit Testing

• Connector Repairs

• Testing for Intermittent Conditions and Poor Connections

• Wiring Repairs


Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

Note

Verify that the pins are correct for all of the antennas. Make sure to fix any problems with other interior antennas, rear center console and front center console first, DTCs B3123, B3122 respectively, before fixing the problem with the rear compartment antenna, DTC B3124.



1. Ignition OFF, disconnect the harness connector at the T10E Keyless Entry Antenna - Rear Compartment.

2. Ignition ON, verify a test lamp does not illuminate between the signal circuit terminal 1 and ground.

3. If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuit tests normal replace the K84 Keyless Entry Control Module.

4. Connect a DMM, set to capture alternating voltage using the MIN MAX function, between the signal circuit terminal 1 and the low reference circuit terminal 2.

5. Operate the rear closure touch pad. Verify the DMM captured an alternating voltage signal.

6. If an alternating 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 K84 Keyless Entry Control Module.

7. If all circuits test normal, test or replace the T10E Keyless Entry Antenna - Rear Compartment. Clear DTCs and then press the tailgate touch pad and check for any DTCs. If DTC B3124 returns, replace the K84 keyless entry control unit.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for keyless entry control module replacement, setup and programming