Low Battery Level on a Key Fob
Thread Starter
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
Low Battery Level on a Key Fob
I was checking out a response to another thread and just learned a new fact.
Did you know that there is a DTC that flags up a low battery level on a fob and that you can identify which fob has the problem?
I'll never stop learning things about this car.
DTC B3109
Circuit Description
The LOW battery detection is handled inside the transmitter. The transmitter sends a battery condition signal to the remote control door lock receiver (RCDLR) when the transmitter buttons are pressed.
Conditions for Setting the DTC
This code shall be set after 3 consecutive low battery signals from the same 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.
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
This step identifies the key fob # (transmitter) with a low battery signal.
This step verifies that the battery replacement corrected the fault.
3 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.
Replace the battery(s) on the indicated transmitter(s). Refer to Transmitter Battery Replacement .
Did you complete the battery(s) replacement?
4 Use the scan tool in order to clear the DTCs.
Operate for 3 consecutive times the transmitter(s) that had the battery replaced.
Does the DTC reset?
Did you know that there is a DTC that flags up a low battery level on a fob and that you can identify which fob has the problem?
I'll never stop learning things about this car.
DTC B3109
Circuit Description
The LOW battery detection is handled inside the transmitter. The transmitter sends a battery condition signal to the remote control door lock receiver (RCDLR) when the transmitter buttons are pressed.
Conditions for Setting the DTC
This code shall be set after 3 consecutive low battery signals from the same 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.
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
This step identifies the key fob # (transmitter) with a low battery signal.
This step verifies that the battery replacement corrected the fault.
3 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.
Replace the battery(s) on the indicated transmitter(s). Refer to Transmitter Battery Replacement .
Did you complete the battery(s) replacement?
4 Use the scan tool in order to clear the DTCs.
Operate for 3 consecutive times the transmitter(s) that had the battery replaced.
Does the DTC reset?
Last edited by DeeGee; Apr 23, 2012 at 11:02 AM.
Administrator
Joined: Mar 2001
Posts: 367,656
Likes: 24,661
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '25
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
Thanks for the info - certainly did not know that bit of information.
Thread Starter
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
