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does sound like the ECU to me now.
Posted by David Ingram (more from David Ingram) on Mon, 3 Sep 2007 08:20:36
In Reply to: TCS gets weirder and came out of limp home mode., Peter Dufault, Sat, 1 Sep 2007 17:18:04
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Since you've replaced the safety valve without success, and both dealers say they cannot make contact with the TCS ECU, then it does sound like the ECU itself is having problems. But it's tough to say, because there could be a wiring issue in the loom between the diagnostic connector and ECU, for one possibility.
It's not necessary to disconnect the battery when diagnosing TCS or when replacing throttle bodies.
It's best if you can clear the system and then recalibrate, when doing throttle bodies, as there's a risk of damaging the new throttle body if you don't. A risk, of course, doesn't mean a guarantee. Plenty of stories of people performing successful transplants without the calibration step.
At this point there's no easy or cheap answer to your problem. You can probably find an ECU inexpensively online someplace, and then have it recalibrated by a shop. But if there's a wiring issue or your replacement ECU is also bad, you may not get any relief. Good luck!
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