Question about 1994 Chevrolet Caprice Classic
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Posted on Jan 02, 2017
Throttle Position Sensor (TPS) is connected to the throttle shaft on the
throttle body. It is a potentiometer with one end connected to 5 volts
from the VCM and the other to ground. A third wire is connected to the
VCM to measure the voltage from the TPS. As the throttle valve angle is
changed (accelerator pedal moved), the output of the TPS also changes.
At a closed throttle position, the output of the TPS is low
(approximately 0.5 volts). As the throttle valve opens, the output
increases so that, at wide-open throttle, the output voltage should be
approximately 4.5 volts. By monitoring the output voltage from the TPS,
the VCM can determine fuel delivery based on throttle valve angle
Fig. 1: Common Throttle Position Sensor (TPS) wiring diagram (wire color, terminal identification/location may vary on certain models)
In addition, I send you some wiring diagrams that coud helpful (click image for zoom)...
Fig. 7: 1996 GM 4.3L Engine Schematic
Fig. 10: 1996-1997 GM S10/Blazer Chassis Schematic
Hope this helps.
Posted on Jul 28, 2011
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