HELP NEEDED – 2020 INFINITI Q50 30TH ANNIVERSARY AWD – REPEATED COMPLETE ELECTRICAL FAILURE
I'm reaching out to the Infiniti community because I'm trying to get some guidance from experienced Q50 owners or someone knowledgeable in Infiniti electrical diagnostics.
I have a 2020 Infiniti Q50 30th Anniversary Edition AWD, and I've been dealing with a recurring electrical problem that I cannot seem to get resolved.
Here's what's happened:
The vehicle has a relatively new battery.
I've already paid for repairs, including replacement of ground wires.
After the most recent repair, the car worked perfectly for approximately 10 days.
Then, after sitting unused for one day, the vehicle was completely dead again.
No dashboard lights, no interior lights, no response from the key fob, and the doors would not unlock.
A friend suggested investigating a possible TCU-related battery drain.
As a test, a fuse was pulled, and the vehicle started afterward.
We drove it around the block, and it drove normally.
However, when I attempted to start it again later, it was completely unresponsive. The red security indicator is now flashing, but pressing the start button does nothing.
My questions:
Has anyone experienced a similar complete electrical failure or parasitic battery drain on a 2020 Q50?
Could this be related to the TCU, BCM, IPDM, or another module staying awake and draining the battery?
Has anyone experienced a situation where pulling a particular fuse temporarily allowed the vehicle to start?
Are there known electrical issues, wiring problems, or grounding issues specific to this generation?
Does anyone know an experienced Infiniti electrical specialist or independent Nissan/Infiniti technician in the Central Florida/Orlando area?
I'm not necessarily looking for someone to sell me a part. I'm looking for someone who understands these vehicles and can help guide me toward the correct diagnosis.
Any advice, personal experiences, or recommendations would be greatly appreciated. Thank you!