B3109

DTC B3109

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview

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

Diagnostic Procedure Instructions Provide an overview of each diagnostic category.

DTC Descriptor
DTC B3109
- Keyless Entry Transmitter Low Battery

Circuit Description

The LOW battery detection is handled inside the transmitter. The transmitter sends a battery condition signal to the body control module (BCM) when any transmitter button is pressed.

Conditions for Setting the DTC

This code shall be set whenever a low battery signal is received from any programmed transmitter.

Conditions for Clearing the DTC

* This code is cleared as current when a normal transmitter voltage signal is received from any programmed transmitter.
* A scan tool may be used to clear history and current DTC(s).

Circuit/System Testing

1. Replace the batteries in the transmitter and with the scan tool clear the DTC.
2. Operate the transmitter three consecutive times.

• If the DTC sets again, test the battery.

3. If all circuits test normal, test or replace the transmitter.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

Control Module References for BCM replacement, setup, and programming