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K. Wiggins
K. Wiggins, ASE Certified Technician
Category: Car
Satisfied Customers: 2782
Experience:  AA in automotive Technology, 15+ years in the trade
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1992 chev corisa 3.1: No signal being received at the throttle

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1992 chev corisa 3.1: No signal being received at the throttle position sensor. 3 wires, black, blue, gray. Which one is the power supply wire and could it be wired direct and use a shut off switch?
The Grey wire is power from the ECM. However it is only 5 volts. If you are receiving no voltage at the TPS you need to check for a break in that wire between the TPS and ecm connector. You cannot apply 12 volts to that wire as it will damage the ecm.
I'll post a wiring diagram below for your reference. If I can assist you further let me know.
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