981 Boxster Electric Power Steering

[Steve16]

I'm wanting to use a 2013 Boxster electric steering rack, p/n 001.347.005.09 in a conversion. I have been able to power it up and see communication on the can bus, but have not been able to get beyond failsafe mode. I have tried playing back logs from the MQB and Mini Cooper power steering posts on the board without success. Can anyone provide or point me to logs to replay? Does anyone know what commands are needed to wake it up and provide speed based assistance? Thanks.

[Jacobsmess]

You'd be best sourcing a canlog from a vehicle that uses this rack or at least one using the same platform. Then reduce the messages down until you loose speed level assist to work out what can messages are required.

[Mitchy]

I should be able to send along a log from a 981 during my next outing, But it may be a few weeks until I can get a log while moving.
I can forward one while stopped/parked pretty quickly though.

Do you have any micro controller to allow sending custom CAN messages?
May be easier if I guide you thru spoofing some messages to see if the amount of assistance changes.
Do you have a list of CAN addresses that it sends out? likely you see:
LH_EPS_01 0x32A
LH_EPS_02 0x11D
LH_EPS_03 0x09F

I haven't really had a chance to see if there's much difference with assistance when at speed vs when stopped; but I can say that the rack definitely does assist.

Jacob did an awesome job on the MQB rack, so I'd imagine that the 981 rack is pretty much identical, you may need to send a idle RPM; as I seem to recall even if coding everything to a hybrid powertrain, the Electronic Parking Brake and the Rack (I believe) needed to see RPM to activate; so it may be a result of a old software revision not having hybrid mode.

I'd hazard a guess and say that you'll need:
Motor_03 - 0x105
ESP_21 - 0x0FD
Klemmen_Status_01 - 0x3C0

[Jacobsmess]

Apologies I didnt realise that this part is an MQB rack also,
This is my efforts to understanding the rack.
viewtopic.php?t=6153
I'm fairly certain to get speed assist my rack (from a VW Transporter T6.1) only required ESP_21 to be played back which contained the speed as well as some other bits. I've fallen behind this part of the conversion due to life but will be carrying on sooin so will be interested to see if you make any progress.

[Steve16]

The Can addresses it sends out are:
0x09F
0x11D
0x32A
0x6C9

I have tried playing the full driving and 0x0FD logs from the MQB Reverse Engineering topic without success. I will try them again.

[Steve16]

Do you have any micro controller to allow sending custom CAN messages?

Yes, I have the ability to send custom can messages. I'm happy to try any suggestions. None of the logs from the MQB Reverse Engineering topic seem to have any effect.