Pass Key Fault

95 caprice, 135k km. Steady on. Car starts fine. Came on yesterday, stayed on for 4 starts, went away on the 5th for 2-3 min and came back.

I disabled VATS in the tune but I don't think it does anything, because the car won't start with a key with no chip.

I cleaned both the key and the cylinder with 99% isopropyl alcohol and contact cleaner but no joy.

Am I heading towards a car that just won't start one day?

Now that the pass key fault light is on, the resistor-less key starts the car, whereas I am 100% sure it did not start it before.

I suspect that to be on the safe side I need to ground A4 off the TDM.

http://www.goldsswagon.com/diagrams/impala_passkey_no_seo.pdf

removed TDM completely, but left the relay in the car.

Jumpered A4 to B5 on the now empty TDM connector. No light, starts fine.

Huzzah

Well it took 22-years but my Security light is on now. Just happened while I was running errands....ran in CVS, came out, went to start the car and it started fine but light is now on solid. Have shut it off and re-started and it comes back on solid every time. Crap.

SO is it as easy and locating the VATS module, unplugging it, and jumping A4 to B5? Is that it?

-Michael