Lately, when I come to a halt in traffic, or at lights, or at a junction my car will sometimes suddenly go from 1st to N,
It's only started doing it recently, and it's not always, just occasionally, but I have no idea why.
Any suggestions please?
Randomly going into Neutral when stationary
Re: Randomly going into Neutral when stationary
I would start by finding out of the TCU is getting a command or request to downshift in that condition. I have seen faulty paddles do something very similar. But it would upshift randomly.
Re: Randomly going into Neutral when stationary
Maybe the RPM signal is lost? Happens a few times connected to a VR style sensor which signal is the weakest on idle.
Re: Randomly going into Neutral when stationary
I don't think it's the paddles as the car shifts fine when driving.zeroto60 wrote: 02 Sep 2024, 04:39 I would start by finding out of the TCU is getting a command or request to downshift in that condition. I have seen faulty paddles do something very similar. But it would upshift randomly.
Re: Randomly going into Neutral when stationary
How would I check this?Remy wrote: 03 Sep 2024, 20:42 Maybe the RPM signal is lost? Happens a few times connected to a VR style sensor which signal is the weakest on idle.
Re: Randomly going into Neutral when stationary
With any diagnostics or tuning you need to datalog the event. You'll be able to watch inputs and press to see what your targeted gear will be. Errors etc..
To answer our earlier question the analog inputs can be monitored in Data List Views - Analogs.
I didn't see what your setup is but the loss of the RPM signal would be my guess. IF your CAN comms are lost from your shifter or engine data. IF you have analog inputs used for shifters or paddles and they are not correctly pulling up/down (the voltage - not the actual paddle). Or it's not releasing after you click it up or down. Using a pigtail wire for connection to the paddles at the steering wheel and it has a broken conductor. Another pain is a speed sensor in the Trans has failed or material on it. The very worst case is a bad solder joint on the PCB or wire jumper ( I normally don't pot the boards and use 'Right Stuff' and glue a cover on for service reasons).
Out of curiosity what do you have the min rpm set to for Clutch Slip?
To answer our earlier question the analog inputs can be monitored in Data List Views - Analogs.
I didn't see what your setup is but the loss of the RPM signal would be my guess. IF your CAN comms are lost from your shifter or engine data. IF you have analog inputs used for shifters or paddles and they are not correctly pulling up/down (the voltage - not the actual paddle). Or it's not releasing after you click it up or down. Using a pigtail wire for connection to the paddles at the steering wheel and it has a broken conductor. Another pain is a speed sensor in the Trans has failed or material on it. The very worst case is a bad solder joint on the PCB or wire jumper ( I normally don't pot the boards and use 'Right Stuff' and glue a cover on for service reasons).
Out of curiosity what do you have the min rpm set to for Clutch Slip?