Question about 1992 Chevrolet G20
No resistance to check or adjust, with key on, one wire will have 5.0 volts, the next one should have about .50 (1/2) volt give or take .10 volts, the last wire is ground, check with volt meter, connect ground from volt meter on to battery ground, and probe with pos. probe, the wire with 5 volts is out put from ECM, and the one with .50 volts is in put to ECM, to check TPS, on the wire with .50 volts, as you open throttle voltage should go up to 5.0 volts, with no drop in voltage, as you open throttle, if there is voltage drop, bad TPS, to adjust, on wire with .50 volts, with key on, engine off, should read .50 volts, if more or less volts, loosen screws on TPS and adjust to .50 volts, hope this was very helpful.
Posted on Sep 15, 2010
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Posted on Jan 02, 2017
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