What is the 5V reference circuit voltage drop?
What is the 5V reference circuit voltage drop? If the 5V reference circuit (in-series) limiting resistor, for example, is 50 ohms and the sensor is 25,000 ohms, then the amperage would be .000199A, or 199µA. The clamp-on amp meter will not be able to measure amperage that low. Also, the voltage drop across the limiting resistor (50 ohms) is around .009V. What happens when the reference signal is 5.0 volts? When the return signal voltage is 5.0 volts, the ECM should have taken into account that the engine is running at idle speed and therefore rationalized that the TPS is...