Fig. 7.13. Location of connector contacts (1) and throttle position sensor (2)
2. Measure the resistance between contacts "1" and "4" of the connector on the sensor side, which should be 3.5–6.5 kOhm (Fig. 7.13).
3. Measure the resistance between contacts "2" and "4" of the connector on the sensor side. When slowly opening the throttle valve from the fully closed (idle) position to the fully open position, the resistance should smoothly change proportionally to the throttle valve opening angle.
4. If the resistance is outside the nominal range or does not change smoothly, replace the throttle position sensor.