What should the voltage be on a TPS switch?
What should the voltage be on a TPS switch? The TPS voltage should be over 4.0 volts. Close the throttle again, and then slowly open it to WOT, observing the voltage reading. It should increase progressively and in a linear fashion. If it sticks or jumps or falls off at all while doing this check, that could mean a bad TPS switch and could be a cause of stumbling and driveability problems. How to test the TPS sensor on a GM car? In three simple test steps, you can find out if the TPS sensor on your GM car or...