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HOMESERVICE MANUALSCHEVROLET2001CAVALIER LS, 2.4 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 280 (KEYLESS ENTRY SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B3109TEST DESCRIPTION
2001 Chevrolet Cavalier LS, 2.4 T

Test Description

2001 Chevrolet Cavalier LS, 2.4 TSECTION Test Description
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

The number(s) below refer to the step number(s) on the diagnostic table.

  1. 3:  This step identifies the key fob # (transmitter) with a low battery signal.
  2. 4:  This step verifies that the battery replacement corrected the fault.
DTC B3109

Step Action Yes No
1 Did you perform the Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Remote Keyless Entry 
2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Select the display DTC function on the scan tool in the remote function actuation menu.
Does the scan tool indicate that DTC B3109 is current?		 Go to Step 3  Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3 
  1. With the scan tool, observe the Key Fob Low Voltage parameters for each transmitter in the Key FOB Information data list to identify the programmed transmitter(s) that set the DTC.
  2. Replace the battery(s) on the indicated transmitter(s). Refer to Transmitter Battery Replacement .
Did you complete the battery(s) replacement?		 Go to Step 4  -
4 
  1. Use the scan tool in order to clear the DTCs.
  2. Operate for 3 consecutive times the transmitter(s) that had the battery replaced.
Does the DTC reset?		 Go to Step 5  System OK
5 Inspect for poor connections at the battery connections of the transmitter(s) that set the DTC.
Did you find and correct the condition?		 System OK Go to Step 6 
6
  1. Replace the transmitter(s).
  2. Ensure that the replacement transmitter(s) is the correct model for the vehicle.
  3. All transmitters must be programmed at the same time. Refer to Transmitter Programming .
Did you complete the replacement?		 Go to Step 7  -
7
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the replaced transmitter(s) 3 consecutive times.
Does the DTC reset?		 Go to Step 8  System OK
8
IMPORTANT: When replacing the remote control door lock receiver (RCDLR), perform the transmitter programming procedure.
Replace the RCDLR. Refer to Remote Control Door Lock Receiver Replacement .Did you complete the replacement?		 System OK -
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.