Experiencing a “key fob not detected” message in your Dodge Challenger can be frustrating and inconvenient. If replacing your key fob battery hasn’t solved the issue, it might indicate a need to resynchronize your key fob with your vehicle’s system. This guide will walk you through a potential resync procedure and shed light on other possible culprits.
Attempting Key Fob Resynchronization
Before considering more complex issues, try this resynchronization procedure. It’s a simple process that might get your key fob working again.
- Enter your Dodge Challenger and get into the driver’s seat. Once inside, immediately lock the driver’s side door using the lock button on your key fob. Do this within 10 seconds of entering the vehicle.
- Insert your key into the ignition switch. Turn the ignition key to the “RUN” position. While holding it in the “RUN” position, simultaneously press and hold the “UNLOCK” button on the driver’s side door panel.
- Press and hold the “UNLOCK” button and the “PANIC” button on your key fob at the same time. Release both buttons simultaneously.
- Next, press and hold the “UNLOCK” button and the “LOCK” button on your key fob at the same time. Release both buttons simultaneously again.
- Finally, press the “UNLOCK” button on your key fob one last time.
After completing these steps, test your key fob to see if it is now detected and functioning correctly.
Understanding Potential Module Issues: WIN and PEM
If the resynchronization procedure doesn’t work, the problem might lie within your Dodge Challenger’s Wireless Ignition Node (WIN) module or the Passive Entry Module (PEM).
- WIN Module: The WIN module is crucial for key fob detection and vehicle ignition. A malfunction in this module can prevent your vehicle from recognizing the key fob signal.
- PEM (Passive Entry Module): The PEM is responsible for the passive entry and keyless go functionalities. It communicates with your key fob using radio frequencies. The PEM powers low-frequency (LF) antennas placed around your vehicle to pinpoint the key fob’s location. It uses VHF RF communication to interact with FOBIKs (Fob with Integrated Key). The PEM’s sophisticated system uses multiple antennas to triangulate the FOBIK’s position within the vehicle.
It’s important to note that the PEM operates even when the ignition is off, thanks to its direct connection to battery voltage and ground. This allows for passive entry functions to work at all times.
Seeking Professional Diagnosis
If you’ve tried the resync procedure and are still facing the “key fob not detected” issue, it’s recommended to seek professional diagnosis. A qualified automotive technician can accurately diagnose whether the issue stems from the WIN module, PEM, the key fob itself, or another part of your Dodge Challenger’s system. They have specialized tools to test these components and recommend the appropriate repair or replacement.
