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You ain't dead from it blowing up , that's how..

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Q: How do you know if your ecm is working?
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Were is the ecm relay located on a 1991 s10?

The ecm module is located behind the passenger side kick panel. I don't know of an ecm relay.


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Is there a correlation between your ac not working and the coolant reading not there on dash display?

Yes. The coolant temp sensor tells the ecm what the engines operating temperature is so that it can run with optimal efficiency. When the ecm does not know the engine temperature, it assumes the worst (that it is over heating) and disables the ac to reduce load on the engine. It will also kick the fans to the high setting. Replace the sensor and the ac should start working again.


What causes a transmission to stop shifting from 2nd gear when the speedometer stops working 2000 Camry?

If the spedometer is not working and the traansmision will not shift out of second it means the speed sensor is bad, unpluged or the wiring for it is damaged. The shif6ts are controled by the ECM (computer) and if does not know the speed of the car, it will not shift.


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Have you retrieved a code from the ECM? If so what is the code. Is the speedo working?