48
Presented by Bob Pattengale
BOSCH MTS 5200 LAB SCOPE
1-800-71-TRAIN (1-800-718-7246) OR www.auto-video.com
THE GRAPHING MULTIMETER
Throttle Position Sensor (TPS)
A normal TPS sensor will have a low voltage with the throttle released and voltage going higher
as the throttle is depressed. Pictured above is a waveform captured from the screen of the lab
scope. This screen capture shows that as the knob on the demonstration board is rotated
(simulating the accelerator pedal being depressed), the voltage increases.
As the knob on the demonstration board is rotated in the opposite direction (simulating the
accelerator pedal being released), the voltage decreases.
The waveform above is an example of what a normal functioning TPS would look like. Next we
will use the demonstration board to add a glitch to the pattern simulating a fault with the TPS.
NOTES
