Code 4-2-3 (Throttle Position Sensor Signal)

Connect ohmmeter between turbo control unit terminals No. 7 and 8. Reading should be 2500-5000 ohms in idle position and 300-500 ohms in full load position. Connect ohmmeter between turbo control unit terminals No. 7 and 24. Reading should be 3000-5000 ohms. Replace throttle position sensor as necessary.