Question about 2001 GMC Safari
TPS is on the end of the throttle plate shaft on the exterior of the throttle body. The role of the TPS is to measure the actual degree of rotation of the throttle plate shaft. An electrical contact arm attached to the throttle shaft sweeps up and down aa carbon track which has applied to it 0volts at one end and 5 volts at the other. The contact of the throttle reads the voltages across this range. When 'closed; the voltage should be close to zero volts
Posted on Sep 11, 2010
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Posted on Jan 02, 2017
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