Fiat 500 Mileage Flashing and U1733 Code - Radio Controls Not Working

Question

The odometer on my dashboard is blinking constantly and my Bluetooth and steering wheel controls have stopped responding. My OBDII scanner is picking up a U1733 code which points to a lost communication with the Convergency Node. I can't even get the media player to recognize my phone anymore.

Tom Patel · Accepted Answer

The issue was a failed Blue&Me module (Part Number 51944597). I sourced a used unit from a donor car for $120. Once installed, the odometer was still flashing, so I had to use MultiECUScan and an ELM327 interface to perform a Proxi Alignment procedure. This synchronized the new module with the BCM, the flashing stopped, and all steering wheel buttons are now fully functional.

Kevin Tran · Answer

A flashing odometer on a Fiat usually indicates a Proxi Alignment mismatch. This happens when a module on the CAN bus stops reporting correctly, causing the Body Control Module to lose its configuration state.

hd_trucker_77 · Answer

You might want to check the USB port wiring in the glovebox or center console. If there is a short in the 5V power line for the USB, it can sometimes pull down the communication line for the Convergency Node.

Jake Morrison · Answer

Check the Blue&Me module itself, which is located in the rear side panel on these models. They are notorious for internal board failure due to heat, and when they die, they drop off the network causing the U1733 code.

Fiat 500 Mileage Flashing and U1733 Code - Radio Controls Not Working

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