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Re: TCS Warning Light
Posted by Andrew J Huang (more from Andrew J Huang) on Thu, 18 May 2000 21:42:57
In Reply to: , Kok Chen, Sat, 17 Dec 1988 12:00:00 

   >The TCS warning light came on yesterday while the wife was driving
   >her 92 9000 T. Went into limp home mode, and she 
   >limped home okay.

Tech 2 or ISAT scan tool time will tell all, but from what I've
experienced, it can be inexpensive.  On the other hand, from what I've
heard, it can be expensive.

In my case, I had an intermittent failure on my 95 Aero, and after
much frustration, finally brought it to somebody with a Tech 2 and was
told that it was the 'safety/bleeder valve' (p/n 4015202).  This is a
$60 switch on the firewall next to the MAP sensor; it has three hose
connections, one of which is very short and vented to free air, and
one two wire cable connection.  The 92 TCS may be very different from
the 95.

I've heard an experience with a 92 9000:

   'My syptom was that the car would run good up until 3/4 throttle and then
   the TCS would dump into fault mode. This continued for a couple of days
   until the TCS degraded to only accepting 1/4 throttle before it would
   fault out. There was nothing obvious that would correct the problem and
   I had to take the car to the dealer (My least favorite thing to do.).'

This was diagnosed to a bad throttle body motor ($1000+), but luckily,

   'Since I had nothing to lose by damaging the throttle motor
   assembly I decided to rap on it with a screwdriver handle in an
   attempt clean the contact surfaces within the unit. Apparently that
   worked and the throttle assembly has been working without a hitch
   since.'

Clearly, YMMV.

-andy huang

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