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DTC B3109: Transmitter Low Battery Detected: Testing

  1. If remote keyless entry diagnostic system check was performed, go to next step. If remote keyless entry diagnostic system check has not been performed, go to REMOTE KEYLESS ENTRY DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Using scan tool, select DISPLAY DTCs function for Remote Control Door Lock Receiver (RCDLR). If scan tool indicates that DTC B3109 is current, go to next step. If scan tool does not indicate that DTC B3109 is current, problem is intermittent.
  3. Using scan tool, observe KEY FOB LOW VOLTAGE parameters for each transmitter in KEY FOB INFORMATION data list to identify programmed transmitter(s) that set DTC. Replace battery(s) on indicated transmitter(s). After repairs, go to next step.
  4. Using scan tool, clear DTCs. Operate transmitter(s) 3 consecutive times that had battery replaced. If DTC resets, go to next step. If DTC does not reset, system is okay.
  5. Check for poor battery connections on transmitter(s) that set DTC. If a problem is found, repair as necessary. If a problem is not found, go to next step.
  6. Replace transmitter(s). Ensure replacement transmitter(s) is correct model for vehicle. Program all transmitters at the same time. See TRANSMITTER PROGRAMMING & SYNCHRONIZATION  under PROGRAMMING. After repairs, go to next step.
  7. Using scan tool, clear DTCs. Operate replaced transmitter(s) 3 consecutive times. If DTC resets, go to next step. If DTC does not reset, system is okay.
  8. Replace RCDLR. See REMOTE CONTROL DOOR LOCK RECEIVER  under REMOVAL & INSTALLATION. Test is complete.
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