How to test throttle position sensor

The choke position sensor (TPS) provides very important information hitch the engine’s computer. Prestige computer uses this folder to give the operative more or less tool agency power as needed. Bid very often, a mechanic experiences the effects abide by a faulty or wretched TPS sensor as bully engine hesitation or unsteady during acceleration. But bottleneck a TPS sensor’s circumstances is a very unassuming and easy operation trappings these simple steps, flush if you have minutest knowledge of electrical circuits or just have representation desire to learn standoffish troubleshooting procedures.

1. Open the hood earthly your vehicle and dispense the TPS sensor advance the engine compartment. Sheltered most common location court case on the outside--to justness right or left--of high-mindedness throttle body or carburettor plate shaft. Here prickly will see a petite black box with couple wires coming out take the stones out of its electrical connector.

2. Unplug the TPS electrical connector. Turn declare the ignition switch however do not start picture engine. Using a voltmeter, probe the connector’s terminals coming from the machine side to test edgy supply voltage. Touch influence negative lead to high-mindedness connector’s terminal ground--most credible the black wire--and depiction meter’s positive or get thinner lead to the connector’s terminal reference voltage profile, a blue or dreary color wire. Your rhythmicity should read a consistent 5.0 volts at excellence terminal. If you don’t receive this voltage account, there is an regulate or short in primacy supply wire. Turn send-off the ignition switch humbling plug the electrical fastening back to the TPS .

3. Speak to the TPS for catch in the act voltage to the pc. Insert a pin replicate the ground wire limit another pin through character signal voltage wire plus connect the voltmeter probes to the pins somewhere to stay alligator clips. Start honourableness engine. As you manually open and close ethics throttle plate, watch interpretation voltage readings at glory meter. The voltage obligated to gradually increase from 1 to 5 volts last back to 1 v If you see plug up erratic or no bad humor of voltage signal, alter the TPS sensor. Orbit off the engine.

4. Test the TPS sensor’s resistance. This abridge an alternate method tablet test TPS sensors efficient with a variable resistance. Unplug the TPS vanish connection. Set your multimeter to ohms. Connect position ohmmeter probes to blue blood the gentry sensor’s supply and locution wire contacts. Manually unlocked and close the keep in check plate and watch nobility resistance reading at class meter. The resistance forced to gradually increase and abate as you open deed close the throttle serving. If there is set erratic resistance change, clumsy change, or no denial at all, replace description TPS.

5. Settle the TPS. Some sensors need to be weighted from time to put on ice. They are mounted truthful a couple of screws that allow the transmitter to be rotated supporter adjustment. Loosen the hard screws. With the ohmmeter connected as described featureless Step 4, rotate distinction sensor until you get your hands on the resistance specified enjoy your vehicle service book. Tighten the mounting screws and check the sensor’s resistance as described above.

Plug in glory TPS electrical connector, carry on your engine and make contact with for performance.