Guide to Disabling the VSC Caldina GTT

[Inane]

Hi guys,

new location for the guide to disabling the VSC in the caldina

Here

[Santa'sBoostinSleigh]

remember kiddies VSC only comes on the (ghey) autos....so this wont work in a manual

[sergei]

So you are saying that if you flick the switch on the fly, the VSC becomes disabled till next restart, so why not make a push button instead of on/off toggle switch?

[Inane]

So you are saying that if you flick the switch on the fly, the VSC becomes disabled till next restart, so why not make a push button instead of on/off toggle switch?

Hi Sergei,

I did think about that, I was even going to put in there that you it would make more sense to have a push button, that way you wouldnt need to remember to switch it back on,

but by the time I got to that bit of the Doc, I cbf'ed,

I'll add it now.

[Inane]

done. updated with post regarding push button

[WanaGo]

So what is this wire you cut exactly? What does it go to specifically, which disables the VSC, but doesnt re-enable it after the connection has been restored?

Is this an input to the ECU or something, and restarting the ECU is required to re-initilise the inputs or something?

I have an electronics background, so would be interested to know.

Thanks
WanaGo

[Inane]

So what is this wire you cut exactly? What does it go to specifically, which disables the VSC, but doesnt re-enable it after the connection has been restored?

Is this an input to the ECU or something, and restarting the ECU is required to re-initilise the inputs or something?

I have an electronics background, so would be interested to know.

Thanks
WanaGo

now I go through all that effort and you just want me to spill? lol.

[Inane]

it'll be through shortly

[WanaGo]

Hey,

Tried this method this afternoon and it works great I used the push button approach, using a normally closed push button. Takes about 2 seconds to disable the VSC now by holding the button ON which cuts the circuit.
PLUS the awesome thing is my alarm has a turbo timer on it, which I have set to only 10 seconds (its minimum), but this means I can turn the key off, which turns the electrics off (but engine continues to run through alarm), then turn it back onto ON position, and the car resumes as normal with the VSC back on. Totally stoked. So can basically re-enable it on the fly.

Took it to the beach this afternoon and tried with VSC on then VSC off, and wow - the difference is amazing.

Thanks heaps.

[WanaGo]

By the looks of the Caldina wiring diagram (thanks to Mr Revhead), that wire is the positive wire of a twisted pair to the stearing sensor. From what it looks like (may be incorrect though), by cutting this wire for over a second, causes the same symptoms as having the stearing sensor go into malfunction - due to no signal for over 1 second. This causes the VSC to shut off due to the stearing sensor being a critical part of the VSC.

There is not alot of information on this diagram, but it looks as though any of the sensors (decceleration, yaw, stearing etc) could be cut and have the same result - but the stearing is probably the easiest to get to and looks as though its the fastest to simulate a malfunction.

On further inspection, resetting the VSC back into normal mode would not be a hard task, it would only require the resetting of the VSC/TRD/ABS/BA computer - which could be done easily. I am not sure how the car would react if this was done while in motion, but how my setup is at the moment with my alarm keeping the ignition circuit/engine computer alive while it kills the rest of the system - a similar approach could be done using a small circuit in the back of the push button/switch.
While I dont need this for my own setup obviously, it would be interesting to see who out of the Auto GTT owners would be interested for something like this.
I know Inane has already looked into all of this - and I dont know how far he got (he may already have been down this road, im not sure).
Inane if you read this, can you post and let me know how far you have got. No point keeping this a secret from everyone now - as it could benefit a few toyspeeders.

I dont want to step on anyones toes, but as I said to inane earier - I am keen as to get a good VSC with on the fly enable, up and running. No point letting my electronics knowledge drift away, its projects like this that keep it in the head.

No doubt this will work for a wide range of auto GTT's and probably GT4's. Possibly more models with VSC too. The wires/plugs may not be the same, but I presume the basic technology will be about the same. It should not be difficult to adapt.

Feedback feedback feedback.

cheers all

WanaGo

[Inane]

By the looks of the Caldina wiring diagram (thanks to Mr Revhead), that wire is the positive wire of a twisted pair to the stearing sensor. From what it looks like (may be incorrect though), by cutting this wire for over a second, causes the same symptoms as having the stearing sensor go into malfunction - due to no signal for over 1 second. This causes the VSC to shut off due to the stearing sensor being a critical part of the VSC.

There is not alot of information on this diagram, but it looks as though any of the sensors (decceleration, yaw, stearing etc) could be cut and have the same result - but the stearing is probably the easiest to get to and looks as though its the fastest to simulate a malfunction.

On further inspection, resetting the VSC back into normal mode would not be a hard task, it would only require the resetting of the VSC/TRD/ABS/BA computer - which could be done easily. I am not sure how the car would react if this was done while in motion, but how my setup is at the moment with my alarm keeping the ignition circuit/engine computer alive while it kills the rest of the system - a similar approach could be done using a small circuit in the back of the push button/switch.
While I dont need this for my own setup obviously, it would be interesting to see who out of the Auto GTT owners would be interested for something like this.
I know Inane has already looked into all of this - and I dont know how far he got (he may already have been down this road, im not sure).
Inane if you read this, can you post and let me know how far you have got. No point keeping this a secret from everyone now - as it could benefit a few toyspeeders.

I dont want to step on anyones toes, but as I said to inane earier - I am keen as to get a good VSC with on the fly enable, up and running. No point letting my electronics knowledge drift away, its projects like this that keep it in the head.

No doubt this will work for a wide range of auto GTT's and probably GT4's. Possibly more models with VSC too. The wires/plugs may not be the same, but I presume the basic technology will be about the same. It should not be difficult to adapt.

Feedback feedback feedback.

cheers all

WanaGo

you have it near bang-on there,

the way it works is instead of actually disabling the vsc you are faking a steering wheel position sensor malfunction, that causes the vsc to disable itself, while keeping the abs functioning.

i got quite a way down the path of looking at a turbo timer type setup, however, the other option is to pass it the diagnostics reset code, via the obd connection,

Its a kind of work in progress / gathering dust type thing for me at the moment as I just dont have the time.

it should work on any of the sensors, however, the sps was the easiest to get to, along with installing a switch.

[WanaGo]

the way it works is instead of actually disabling the vsc you are faking a steering wheel position sensor malfunction, that causes the vsc to disable itself, while keeping the abs functioning.

Yeah thats what I said didnt I? hmm.. its what I ment anyway, may have read differently. Anyway.

Cool as - didnt think about the OBD connection - dont know much about it, but may have a look at that. Might be something that could be done easily, depending on what sort of 'code' it requires. Do you have any idea on that? it is a sequence of pulses, or holding pins high or what.... any idea? Anyone...? Well - I should do a search first

Cheers for that Inane.

Im still amazed at the difference it made on the beach. When I went down, the tide was just going out, so the sand was soft as. The vsc started beeping just going basically straight ahead, and the taction control seemed to be holding it back alot too. was really sluggish. Was really soft though.
Turned the VSC off and OMG. the whole car got completely covered in sand, like it got everwhere, on the roof, all over the mirrors, on the bonet and boot. everywhere. Took me a good hour afterwards to hose all underneith and get the sand out.
Quite funny, there was a youngish guy down there with his mates doing burn outs and donuts etc in the sand - totally showed them up. with that VSC off, and the 4wd - you can do some fun stuff. powering foward, with the car on an angle flicking the ground up... man that is fun. Does mean handbrakies too.

Going under 30km/h the whole time of course, well out of peoples way.

Its like I have a new more powerful fun car now. have VSC on - on the road though.

chur chur

WanaGo