DIY Yaw Sensor rocker switch

BGTV8

Mine is done, used crimp connectors and ratchet crimper and mounted the rocker switch in the spare panel between heated seat switches.

Since I am a 2009 model, isolating the yaw sensor and pressing the VDC button illuminates both VDC and "slip" warning lights. To re-enable, the ignition needs to be cycled.

Takes about a half-hour and the most difficult issue is stripping the insulation off the green wire. In the end , I elected to hold the wire with long-nose pliers and used a sharp knife to score the insulation which then pulled off between my fingers as there was not sufficient room to use my wire stripping tool.

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Z&I

Just double checking ...
I also have an 2009 6MT and am looking to disable the VDC and ABLS when I take it to the track.
You've intercepted the GREEN wire going in to the controller ... and you've successfully dropped out the VDC and the ABLS.

Do the brake lights work and Can you do a standing burn out now ???

I'm looking to install a line lock and take my car to the drag strip...need to do a standing burn out to warm up the tires...

Thanks,
Bob

BGTV8

Brake lights work, not sure about standing burnout - definitely lays rubber (big-time), but have never tried a burn-out against the brakes - I suspect that this still will not be possible because most ECU's these days that have fly-by-wire throttle have a throttle limitation when the brake lights are on - which is to stop old farts like me hitting the gas too hard and ending up over the footpath and inside the store.

To answer your question - the mod fixes my problem which was the electronics intervening when I am trail-braking on the track, but I don;t reckon it will fix your problem which is more aligned to drag-racing ...

V1H

Hi there. I was curious about this jaw sensor mod as I've only done the power brake mod for burnouts. I am not tracking and didn't know about trail-braking but read up on it now. It is clearly a desirable skill on the track (and road). But can you elaborate why and in what way the ECM interferes when trail-braking? Does the VCD apply additional unwanted brake during a fast corner? Why would switching off VCD not suffice. Thx for enlightening me

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BGTV8

Just seen this comment ............

There are two inter-related electronic stability control functions, ESC and VDC. ESC is basically monitoring difference between wheel speeds at all 4 corners and if the rear wheels are turning faster than the fronts, the ECU will cut fuel/ignition to stop the wheel-spin and keep you straight.

VDC monitors "yaw" and it is trying to determine if the car is sliding and will trigger one or more brake calipers via the ABS controller. For instance, VDC figures that if you have a little left hand lock in the steering, and the yaw sensor shows lateral acceleration to the right (i.e. sliding to the right - what you get when cornering hard to the left with a slide), it will trigger the right rear brake to try and straighten the car up so you can then steer out of trouble.

All very good except if I am flat in 4th on the approach to T9 at Philip Island GP circuit - a part of the circuit where your are turning left, the car is sliding towards the right hand side of the track and you require a trail brake deep into the approach and the VDC gives your right rear brake caliper a tweak which pitches the car right towards the wall - THAT gets your attention. It is exactly the wrong thing for the electronics to be doing, and why I have a switch to disable it.

Road car safety algorithms are usually the precise opposite of what you require on a track.