Electrical Diagram f355 f1 controls

Hi, Jeffry.

The WSM includes the electrical diagram. It's in the F1 gearbox section. It has two diagrams, in fact.

Here are some colourised versions of them:

https://www.dropbox.com/t/fz8pzFIJtdmqIMLE

https://www.dropbox.com/t/tggx5LQlytUTuIku

Unfortunately, both of these diagrams fail to show the "Gearbox Input Shaft Sensor". Seems Ferrari forgot to include it in the diagrams, so I don't know which pins of the F1 TCU are hooked up to it.

Other wiring diagrams (instruments, engine, etc) have differences on F1 cars. What do you need the diagrams for?

 

You're welcome

F1 shifting issues are rarely electrical. There are a few experts on the forum who might be able to help you if you get stuck.

 

I just went through this. The possible culprits are:

1. If you have removed the F1 system for an engine out and just put it back, make sure all the connectors are in the right places.
2. Check system pressure
3. Pump assembly: head and motor
4. Actuator and its sensors
5. Solenoids

In that order.

 

It would be helpful if you gave some context. What repair was done to the car F1 system by you or someone else before the issue started?

 

Let's work on one thing at a time.

When you say, Car won't start. What exactly are you doing to start the car? Did you press the key fob immobilizer button? Did the starter come on and spin the motor?

Is the light number 5 on?
Image Unavailable, Please Login

 

You have two potentially related issues:

1) The car is not allowed to start
2) The gearbox is not working

Until you can start the vehicle with a key and not bypassing the start relay, nothing else really is valid yet.

On an F1 car, the car cannot start IF one of these conditions is true:

1) Car is in gear, or the car thinks the gearbox is in gear and not N. (Starting a car in any gear is dangerous, and is not allowed)
2) Engine lid is open,
3) Door is open.

First, you can check the lid switch and the door switch are functioning correctly (Check at the ECU while activating the door and the lid to see if signals change state). If those work, then
Second, the Gearbox is not able to detect what gear it is in. And that is why you have a -- on the display, as well as an audible beep.

The reasons are: the gear position sensors integrated inside the Actuator are bad. OR, the Transmission Control Unit is bad. If you are sure that the actuator is good (how can you tell?) then the TCU is bad.

 

That is not "working". The LED should go out after a few seconds. However it only sounds like your siren has a faulty battery. That can be fixed later.

 

Google came up with this...

https://www.ebay.com/itm/256550409410

 

You might try contacting the ebay seller on the auction above. Francorshamps of America https://ferrarioc.com/ does electronic repairs of all sorts of Ferrari electronics (Dashes, ECU's).
They are probably remanufacturing the 355 TCU. Maybe they can test or repair your original?

From the looks of the ebay auction, 355 TCU failure might be a common issue, as on the auction they have sold 2 and have 8 available for sale.

 

This means that the display misses the signal from your TCU.

And this that your TCU is not fully blown (unless it is a continuous beep).


Did you open the TCU and had a look at it by yourself? Are you handy with a multimeter and oscilloscope?