Having issues with your Ford Focus 2016 Key Fob? You’re not alone. Many owners encounter problems ranging from simple battery replacements to more complex electronic malfunctions. This guide details a troubleshooting process, highlighting a point where further expert assistance might be needed.
The initial steps involve verifying the key fobs are indeed the correct ones for the vehicle. After confirming key compatibility and still facing issues, the diagnostic procedure moves to step R3. This stage directs us to check the Body Control Module (BCM) and Radio Frequency Amplifier (RFA) systems. In this particular case, the RFA check failed, signaling a potential problem in this area. Despite this failure, the troubleshooting guide suggests proceeding to the communication network check – a step that can be unclear without specialized knowledge.
Skipping the communication network step temporarily, the process advances to R4. Here, a scan tool is used to check for Diagnostic Trouble Codes (DTCs). The code U201F:13 was detected, which relates to a communication network fault. This further emphasizes a potential issue within the vehicle’s communication system that might be affecting the key fob functionality. Step R10 is next in line.
Step R10 involves disconnecting the RF receiver and the RFA module. A voltage test on wire number 1 in the RF receiver connector to ground should yield around 12V. The test result was approximately 12.3V, which is within the expected range. Moving to R12, the procedure requires checking voltage on RF receiver wires 2 and 3.
Again, a reading of around 12.3V was obtained, similar to step R10, suggesting the power supply to the RF receiver might be functioning. Step R13 then instructs to remove the ignition relay and jump pins 3 and 5. After this, checking for voltage on RF receiver wire 1 to ground should show voltage if the circuit is complete. However, in this case, no voltage was detected.
Finally, R14 requires checking the resistance between RF receiver wire 1 and ground. It should be 10,000 ohms or greater. The meter reading stayed at “OL” (Over Limit), indicating very high or infinite resistance, suggesting an open circuit or a short to voltage, which is contradictory to the previous step’s no voltage reading. The guide then directs to consult a wiring diagram to find the cause of a potential short.
At this point, further diagnosis becomes challenging without a wiring diagram and a deeper understanding of the Ford Focus 2016 communication network. Understanding the communication network from step R3 is crucial, and obtaining a wiring diagram is highly recommended to proceed with troubleshooting the Ford Focus 2016 key fob issue effectively. Visually inspecting accessible wiring harnesses, as done by checking the center console and glovebox areas, is a good step, but a wiring diagram would provide targeted areas to investigate for potential wire damage and shorts.
