byront8 Posted March 14, 2023 Report Share Posted March 14, 2023 Are there any plans to support native cruise control switch on the TTX in a MK1 TT? Pins required are 38/57/75/76 to operate off the stalk, but these are NC on the wiring pinout for the TTX? Really would love to be able to have stock cruise control. Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 14, 2023 Report Share Posted March 14, 2023 Yes it would be nice but unfortunately it is a fair way down our list of priorities at the moment, there's quite a few plug-ins ahead of it which badly need an update. I believe back when we designed that ecu the car we purchased and all local cars we tested on didnt have cruise. Looking at the wiring diagrams we have it is not very clear how the switch works. Do you have any info on it? A CAN keypad may be a nice way to do it. Quote Link to comment Share on other sites More sharing options...
byront8 Posted March 14, 2023 Author Report Share Posted March 14, 2023 Hey Adam I have a wiring diagram somewhere that shows operation - and my car is located in CHCH. So if it ever boils up to the top of the priortiy list, happy to help with the hardware already installed. How would I go about setting this up on the keypad? I have one that has spare buttons. Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 14, 2023 Report Share Posted March 14, 2023 Something like below. I would use a table button for the cruise on switch so you can have different colors to indicate status - this example would be LED off when cruise is off, green when cruise is enabled but not active, red when enabled and set/active. Simple buttons for the rest. Quote Link to comment Share on other sites More sharing options...
byront8 Posted March 14, 2023 Author Report Share Posted March 14, 2023 Hey Adam Thanks for this will have a crack at how it works - does this also allow for the brake NO switch to be used also as cancel? Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 14, 2023 Report Share Posted March 14, 2023 Yes the brake switch and clutch switch if fitted will still be used as lockouts for CC. Quote Link to comment Share on other sites More sharing options...
byront8 Posted March 15, 2023 Author Report Share Posted March 15, 2023 Pretty sure the switch on the stalk is this - pin 56 in the written response should read 57 (typo) Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 15, 2023 Report Share Posted March 15, 2023 Yeah we have a similar drawing but the internal schematic of the switch didnt make a lot of sense without knowing what position it was drawn in and how it mechanically works. So according to the notes above, the schematic must be drawn in the "ON" position, OFF would be the lower set of contacts on the 3 pole switch and Res would be the upper contacts. The Set button would be the lower independent switch in the schematic. How does the switch mechanically work - does it latch in OFF or ON but only momentary/spring return for Res? pin 38 would have 12V all the time, in all three switch positions. Not sure what that does but our ecu wouldnt need it. pin 76 would have 12V in ON and RES positions, this would be the "Cruise On" input. pin 75 would have 12V only in the RES position, this would be the resume input. Pin 57 would have 12V only when the SET button is pressed, this would be the SET input. There is no cruise cancel switch, a bit odd but I guess you have to use the brake pedal? Quote Link to comment Share on other sites More sharing options...
byront8 Posted March 19, 2023 Author Report Share Posted March 19, 2023 So from memory on the operation of it. Switch on/off - self explanatory, toggle switch either on/off Short press "RES" - Reset Long press "RES" - increase speed Short press "SET" - Set Long Press "SET" - decrease speed/coast No cancel, switch to "OFF" or brake pedal is cancel cruise.avif cruise 2.jfif Quote Link to comment Share on other sites More sharing options...
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