TP Sensor

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TP Sensor

can any 1 please give me some details on this sensor how it works and wat is the life of this sensor is it necessary to replace it after 10 years even if its working fine and no computer light turning on and how to check if its working

Gari.pk User 2953 asked on 30 Jun 2010 14:26:56 pm

1 Answer

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Huzaifa - on 30 Jun 2010 14:27:07 pm

The throttle position sensor is a potentiometer, connected to the throttle shaft on the throttle body. The TPS electrical circuit consists of a 5V supply line which is grey and a ground path line which is black, both provided by the ECM. A third wire is used as a signal line to the ECM. By monitoring the voltage on the signal line, the ECM calculates throttle position. As the throttle valve angle is changed (accelerator pedal moved), the signal voltage of the TPS also changes. At closed throttle position, the signal of the TPS is low -1.25 volts. As the throttle valve opens, the signal voltage increases so that, at wide open throttle it should be approx. 5 volts.

The ECM can determine fuel delivery based on throttle valve angle (driver demand). A broken or loose TPS can cause intermittent bursts of fuel from the injector and an unstable idle, because the ECM thinks the throttle is moving.

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