What should a throttle position sensor read?
If the TPS has a worn spot, most likely it will be between 0 and 20 percent throttle opening. Try holding the throttle between 0 and 20 percent to see if you get a steady reading. If the reading suddenly drops while holding the gas pedal or throttle linkage steady, it may indicate a fault with the sensor.
What should throttle position sensor be at idle?
What percentage should TPS be at idle? At idle is should be zero or a couple of degrees. Press down on the gas pedal very S-L-O-W-L-Y until the throttle is all the way open. You should see the percentage of throttle opening gradually increase to 100 percent at wide open throttle.
What is the code for a bad throttle position sensor?
What Does Code P0122 Mean? Code P0122 is triggered when your vehicle’s Engine Control Module (ECM) detects that your Throttle Position Sensor (TPS) circuit A is reporting an output voltage that is below its expected voltage. Depending on your vehicle, your TPS lower output voltage limit should be around .
What are the three wires on a throttle position sensor?
The three wires entering the throttle switch coupling are grounding, idle mode signal and full load signal. Connect the negative terminal of a voltmeter to the engine ground. Determine the ground, idling and full load terminals of the sensor.
How do you diagnose a bad throttle position sensor?
Symptoms of a Bad or Failing Throttle Position Sensor
- Car won’t accelerate, lacks power when accelerating, or accelerates itself.
- Engine won’t idle smoothly, idles too slowly, or stalls.
- Car accelerates, but won’t exceed a relatively low speed, or shift up.
How does the throttle position sensor work on a Toyota?
The throttle position sensor’s job is to measure the angle of the throttle plate as you step on (and step off) the accelerator pedal since the throttle plate is connected to the accelerator pedal via the accelerator cable. Your Toyota’s PCM receives this throttle angle info on the middle wire. The other two provide power and Ground (to the TPS).
How to test the TP sensor on a Toyota Corolla?
The throttle position sensor (TPS) on your 1998-2002 1.8L equipped Toyota Corolla can be easily tested with just a multimeter. Not only is this test fast and easy but it’s also a very accurate test and will let you know if the TPS is bad (or not).
Can a multimeter test the throttle position sensor?
Not only is this test fast and easy but it’s also a very accurate test and will let you know if the TPS is bad (or not). By testing the throttle position sensor (TPS) with your multimeter, you’ll also be able to diagnose any of the following TP sensor trouble codes that may be lighting up the check engine light (CEL) on your Toyota: