How to measure the voltage of throttle position sensor?

A multimeter can be used to measure the voltage of the throttle position sensor.

1. There are three types of throttle position sensors: switch type, sliding resistance type and integrated type. Different types have different maintenance methods.

2, for the switch type, can be in the sensor socket, use multimeter to measure the idle speed and full load switch conduction. ① The idle switch is turned on when the throttle valve is fully closed, and the full load switch should be turned on when the throttle valve is fully opened or nearly fully opened. Otherwise, if both are not turned on, this is normal.

3. For the sliding resistance type, its resistance will increase with the increase of throttle opening, so it is necessary to test whether the maximum resistance meets the requirements.

4. There is also a comprehensive type, which is also tested with a multimeter. It adds an idle switch on the basis of sliding type. ① Under normal circumstances, when idling, the idle contact is closed and a signal is output, while in other cases, the signal voltage will increase with the increase of throttle opening.

Extended data:

When repairing the linear output throttle position sensor, the power supply voltage and signal voltage can be measured by multimeter. The standard data of TPS for Santana 2000GSi car is shown in Table 3, and it should be overhauled. If the voltage value is greater than the value specified in the table, the sensor is damaged and should be replaced.

Check the continuity between the terminals on the vehicle, turn the ignition switch to the "OFF" position, unplug the throttle position sensor connector, and insert a thickness gauge with appropriate thickness between the throttle limit screw and the limit rod; Use multimeter Ω to measure the continuity of idle contact and full load contact at the throttle position sensor connector.

When checking the resistance, please turn off the ignition switch and unplug the wire connector. The resistance between terminals on two plugs of ECU and sensor shall meet the requirements in Table 3. If the resistance is too large or too small, it means that the harness terminal is in poor contact and should be repaired.

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