458 Radio not working, TPMS wont calibrate, No Nav, & other problems

Dealer isn't taking work until september, and there are no other shops around here I have had luck with. I now try to fix everything I can on my own and have had good success with it. However, this one has me stumped.

The car runs and drives normally

Here are the things that I noticed are malfunctioning
1. TPMS light on and not calibrating
2. Right screen only on speedometer, no nav, no radio etc
3. Right side controls do not work and the backlights for them are not even on (radio, nav controls)
4. Seat heater error on dash

I had a scanner clear all fault codes and it didn't make any change.

I read that a battery could cause these problems? But it has the biggest antigravity lithium ion battery they make.

Any ideas?

 

Also, passenger window goes all the way down whenever the door is opened.

 

Ok, I feel dumb. I didn't realize the radio/nav screen had to be turned on by holding the on button. That is working.

So, an updated problem list.

1. Left seat heater malfunction
2. Tire pressure sensors won't calibrate
3. Rear license plate light error (has new bulbs)
4. Passenger windows goes all the way down when door is opened

 

Car sat for a week and the battery was at 13.5 volts before I tried starting it also

 

Passenger window limit switch seems like it is not working properly based on what the scan tool says.

I can use the scan tool to activate the license plate lights, so from my reading it seems the bulbs/computers are sensitive to voltage. I will try another bulb set and see if it makes a difference.

Will update those two problems. Still working on the TPMS & LH seat heater error

 

Swapped out different bulb's and housings. That fixed that problem.

I don't think any of my problems are due to the battery.

I can see the window limit switch is not triggered on my scan tool. My left door works properly and when it is up in the closed position it triggers the switch. Doesn't do it on the passenger side. I will need to take the panel off an inspect.

I am going to order a TPMS tool to check battery life and see if the sensors are bad and go from there.

Still haven't got anywhere with the LH seat heater warning light yet.

 

I got the TPMS working, How? I don't know. These Italian cars man....

Today was a productive day. Got a lot fixed.

Tomorrow going to tear into the passenger door and see what's going on there.

Also have a set of Yellow calipers I am planning on swapping for my black ones. May try and knock that out too.

 

Yes, would try and recalibrate many times while driving with no luck.

Battery has been rock solid so far. Very happy with it.