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Test Description

WARNING: This page is about a different car, the 2003 Saturn LW300, 2003 Saturn LW200, 2003 Saturn L300, and 2003 Saturn L200. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 1:  Diagnostic system check
  2. 2:  Checks DTC status as current or history in Remote Function Actuation Menu on scan tool.
  3. 3:  This step identifies the key fob #, transmitter, with a low battery signal.
  4. 4:  This step verifies that the battery replacement corrected the fault.
DTC B3109

Step Action Yes No
Schematic Reference:  Keyless Entry Schematics  
1  Did you perform the Remote Keyless Entry 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 body control module display DTCs function on the scan tool.
Does the scan tool display DTC B3109 as a current DTC?		 Go to Step 3  Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3 
  1. With a scan tool, observe the Key Fob Low Voltage parameters for each transmitter in the Door Lock Information data list to identify the programmed transmitter that set the code.
  2. Replace the battery(s) on the indicated transmitters. 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 DTCs.
  2. Operate for 3 consecutive times the transmitters that had the battery replaced.
Does the DTC reset?		 Go to Step 5  System OK
5 Inspect for poor connections at the battery connection of the transmitters that set the DTC.
Did you find and correct the condition?		 System OK Go to Step 6 
6
  1. Replace the transmitters.
  2. Ensure that the replacement transmitters 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 scan tool in order to clear the DTCs.
  2. Operate the replacement transmitters 3 consecutive times.
Does the DTC reset?		 Go to Step 8  System OK
8
IMPORTANT: When replacing the integrated body control module (IBCM), perform the transmitter reprogramming procedure.
Replace the IBCM. Refer to Body Control Module Replacement in Body Control System.
Did you complete the replacement?
 System OK -
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