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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G3500, VAN PASSENGER EXTENDED, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 826 (KEYLESS ENTRY SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC B3109: LOW BATTERY SIGNAL FROM ANY PROGRAMMED TRANSMITTERTEST DESCRIPTION
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 F

Test Description

2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 FSECTION Test Description
WARNING: This page is about a different car, the 2003 Saturn Vue. 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. 2:  This step identifies the 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. With a scan tool, clear the DTC.
  2. Press a button on each of the transmitters while monitoring the scan tool body control module (BCM) DTC list.
Does the scan tool indicate that DTC B3109 reset when the button was pressed on any of the transmitters?		 Go to Step 3  Go to Testing for Intermittent and Poor Connections in Wiring Systems
3 Replace the battery on the transmitter(s) that reset DTC B3109. 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 the transmitter(s) that had the battery replaced.
Does the DTC reset?		 Go to Step 5  Go to Step 8 
5
  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 6  -
6
  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  Go to Step 7 
7
IMPORTANT: When replacing the BCM, perform the transmitter programming procedure.
Replace the BCM. Refer to in Body Control Systems.Did you complete the replacement?		 Go to Step 8  -
8 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
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.