General information
The throttle position sensor is a sliding contact potentiometer that moves according to the rotation of the throttle shaft, indicating the opening angle of the throttle. When the throttle axis is rotated, the signal voltage of the throttle position sensor changes. Based on the change in the voltage value of the sensor signal, the electronic engine control unit determines the degree of opening of the throttle valve.
Based on the sensor signal, the electronic engine control unit corrects the duration of the injector opening signal and the ignition timing.
Engines 2.0 l / 2.4 l. | Engines 2.7 liters. |
Troubleshooting Guide
1. Throttle position sensor signal is more important to the automatic transmission control system than to the engine management system. If the throttle position sensor is faulty, then "percussion" (jerk) gear shifting and other malfunctions may occur.
2. If the engine idling abnormally or poor engine response is noted, check the throttle position sensor connector. (If the throttle position sensor connector is connected incorrectly or there is poor contact in the connector, the tester may read the data that the idle speed is permanently off even when the accelerator pedal is released. This can cause uneven engine idling or poor throttle response.)
Throttle position sensor test
1. Disconnect the throttle position sensor connector.
2. Measure the resistance between the indicated sensor connector pins:
- A) (2.0L/2.4L engines) Between withdrawal "1" ("weight") and conclusion "2" (nutrition) sensor.
- b) (2.7L engine) Between withdrawal "2" ("weight") and conclusion "1" (nutrition) sensor.
Rated value:
- Engines 2.0L/2.4L: 3.5-6.5 kOhm
- Engine 2.7 l: 1.6-2.4 kOhm
3. Connect an analog type ohmmeter between the indicated sensor connector pins:
- A) (2.0L/2.4L engines) Between withdrawal "1" ("weight") and conclusion "3" (signal) sensor.
- b) (2.7L engine) Between withdrawal "2" ("weight") and conclusion "3" (signal) sensor.
4. Slowly opening the throttle from fully closed (idling) to the fully open position, check that the resistance changes smoothly in proportion to the throttle opening angle.
5. If the resistance either differs from the nominal value, or does not change smoothly, then replace the throttle position sensor.
6. Install the sensor and tighten the bolts of its fastening to the nominal torque.
- Tightening torque: 1.5-2.5 Nm
Checking with a tester Measure the signal voltage of the throttle position sensor when the ignition key is in the "ON" (ON) or the engine is running.
Table. Rated value.
Engine condition | Rated value |
Idling (throttle valve in fully closed position) | 300 - 900 mV (2.0 l / 2.4 l) 250 - 800 mV (2.7 l) |
Slow throttle opening | Increases with throttle opening |
Throttle fully open | 4250-4700 mV |