Hello all. My F1 transmission is behaving weirdly and I'm hoping someone has some insights... 1. In AUTO mode it shifts fine from 1st to 2nd, but it will not shift past 2nd. I can manually shift while in AUTO. 2.When sitting in 1st without depressing the gas or brake pedal, it will not drop into Neutral 3. I can be shifted into 1st and Reverse without depressing the brake. I'm not sure about 1st, but I'm pretty sure that it shouldn't allow shifting into R without firmly depressing the brake pedal. In manual it drives as it should. The dealer checked for codes but there are none. Any thoughts? Thanks in advance.
USe "data stream" function of a diag tool to see if things look right - brake pressed, door closed, etc etc
The owners manual says the car must be "standing". There is no mention of brake except when the engine is not running. I assume standing is based on vehicle speed, one of the inputs into the F1 TCU: Image Unavailable, Please Login The brake logic is probably for engine not running as it may assume you are about to start. Image Unavailable, Please Login
Having said that, the WSM says this: Image Unavailable, Please Login Is this more of a procedural/safety thing, rather than system logic? Are these Owner's Manual and WSM references contradictory? Owner's Manual Image Unavailable, Please Login WSM Image Unavailable, Please Login I think on the 360, the shift to Neutral is after 4 seconds (brake unpushed). The F430 is much longer (50 seconds).
Thanks for the replies so far. It had been several months since I had driven the car but I clearly remember that shifting to R required depressing the brake. In fact I recall seeing posts on this forum about a brake switch failing that would not allow shifting into R. I also clearly remember the transmission dropping to N when sitting at a stop light in 1st...50 seconds sounds about right. Maybe that switch is stuck in the depressed position? I'll have to check that. Any thoughts on why it won't shift past 2nd in AUTO? Sent from my iPhone using FerrariChat
As I mentioned above use the data stream feature of a dish tool to see if brake pedal switch is functioning correctly. Just press and release and see if data stream looks right All the issues including only being able to go to 2 gear are all indications of a "depressed brake pedal" Sent from my moto g power using Tapatalk
Just checked the brake pedal switch and it seems to be stuck with the plunger up....the pedal is not depressed in the photo. Is there possibly an adjustment for this? Image Unavailable, Please Login Sent from my iPhone using FerrariChat
YUP! Tried adjusting it...pulled out the plunger but still no joy. The circuit opens when I shim the plunger....could also be the brake pedal needs to be moved up a few mm.
Look at manual for how to adjust new /replaced switch .. different process fir different vins iirc Sent from my moto g power using Tapatalk
Thanks...that's where I got the info on how to adjust it....unsuccessfully though, so time for a new switch.
Maybe try cleaning and lubricating as a temporary measure whilst you wait for a new switch. Was the photo taken before you pulled on the plunger? It doesn’t look long enough. https://www.scuderiacarparts.com/part/2977/ferrari/133555/pushbutton-switch.html Image Unavailable, Please Login
Thanks for the advice, everyone.....new switch installed....all is good! The only issue now is that a few of the third brake light LED bulbs have burned out, presumably from being on all the time. It seems they are not replaceable, so I have to source a new light assembly. Superformance seems to have one that can be fitted for around $65.
Your brake lights would have been off all the time. The plunger has to extend for the brake lights to come on.
Oddly enough, they were stuck ON. I know it doesn't make sense, but If I shimmed the plunger on the old switch to depress it, the brake lights turned off and the shifting problems corrected. I guess that explains why I was able to shift into gear without pressing the brake pedal and why it wouldn't drop to N when standing. Something obviously messed up with the internals of the switch, causing the circuit to close when the plunger was extended.
That's weird. The switch internals must be really messed up. That's how it is supposed to work. The plunger is allowed to extend when the pedal is pushed away from the switch to the floor. This completes the circuit and puts the lights on. It's interesting to see you have the old type switch with only 3 contacts. I was going to ask you to do some tests on the old switch, but it sounds like the switch is electricaly messed up, not just a spring issue. Anyway, if you have an ohmmeter maybe you could extend the plunger manually and see if you have continuity between pins 2 & 3 (i.e. the pins with the wires on them). Image Unavailable, Please Login And when the plunger is retracted, do you have continuity between pins 1 & 2.
Now that I think about it, the plunger was fully extended, but not making contact with the brake pedal, so when I shimmed it and depressed it, it switched off.
