ASC+T won't disable on E34 525

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rd - 17 May 2007 16:18 GMT

I've got a 95 E34 (525ia) with 98k miles. When I press the ASC+T
switch to disable the ASC+T, nothing happens. The light is working
since it comes on briefly during startup. I need to be able to
disengage ASC+T to pass emissions here in Ct on the dyno. Is there
some common failure that can be fixed, or a way to disable the system
to go through the dyno test?
Thanks.

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Enoch Root - 09 Jun 2007 22:14 GMT

> I've got a 95 E34 (525ia) with 98k miles. When I press the ASC+T switch
> to disable the ASC+T, nothing happens. The light is working since it
[quoted text clipped - 3 lines]
> test?
> Thanks.

Hold the button down for 10 seconds. This will disable traction control
in total and lock both wheels. No more one wheel spinning. But if you
just want to disable traction control, tap the button and the light will
come on. That means it's disabled, but your wheels are not locked. You
still have limited slip on the wheels going. So if you just wanna race
or test what it's like to drive with a brain, then hold the button down.
THat's it.

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Fred W - 10 Jun 2007 13:03 GMT

>>I've got a 95 E34 (525ia) with 98k miles. When I press the ASC+T switch
>>to disable the ASC+T, nothing happens. The light is working since it
[quoted text clipped - 11 lines]
> or test what it's like to drive with a brain, then hold the button down.
> THat's it.

You must be kidding. Disabling traction control does *not* have
anything whatsoever to do with a limited slip or locking the rear
differential.

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-Fred W

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