Electronic Engine Control Sensors

Air Flow Sensor
Intake Air Temperature Sensor
Throttle Valve Position Sensor
Manifold Absolute Pressure Sensor
Engine Coolant Temperature Sensor
Knock Sensor
Crankshaft Position Sensor
Camshaft Position Sensor
O2-Sensor

Actuators

Idle Air Control Valve
Evaporative Emission Control System Purge Valve
Exhaust Gas Recirculation Valve
Fuel Injector
Continuous Variable Valve Timing
Fuel Pump

Ignition Systems

Distributor Ignition
Distributorless Ignition System
Coil-On-Plug Ignition System

Complex Engine Diagnostics

CSS script
Px script
ElPower script
CKP-CMP synchronization

Throttle Valve Position Sensor

Position sensor is a potentiometer with one or two characteristic curves.

TPS Sensor
Engine coolant temperature sensor

Application:

  • Throttle position sensor
  • Accelerator pedal position sensor
  • Air flow sensor
  • EGR valve position sensor
  • Fuel level sensor
  • Transmission range sensor
TPS location
Typical location of the throttle position sensor.
TPS connection
Connection of the USB Autoscope IV to the sensor signal wire.
TPS mode
Setting the USB Autoscope IV to the throttle position sensor testing mode
TPS Mitsubishi Lancer
Output voltage waveform of the throttle position sensor in good condition on a Mitsubishi Lancer 1.6 2005, recorded with the ignition on and the engine off while smoothly opening and closing the throttle.
Dual TPS Toyota Avensis 1.8i
Output voltage waveform of the dual throttle position sensor in good condition on a Toyota Avensis 1.8i 2007, recorded with the ignition on and the engine off while smoothly opening and closing the throttle
Malfunctioning TPS
Output voltage waveform of a malfunctioning throttle position sensor with a malfunction, recorded with the ignition on and the engine off while smoothly opening and closing the throttle
Properly functioning TPS
Output voltage waveform from a properly functioning throttle position sensor on Mitsubishi Lancer 1.6 2005. A B – throttle valve opening; C D – throttle valve closing
TPS-connection-circuit
Properly-functioning-TPS-Toyota
Output voltage waveforms from a properly functioning throttle position sensor on Toyota Avensis 1.8i 2007
TPS-connection-circuit-Toyota
Properly-functioning-tps-VW-Passa-1.8TSI-2008
Output voltage waveforms from a properly functioning throttle position sensor on VW Passat 1.8TSI 2008
Properly-functioning-TPS-VW-Passat-1.8-1991
Output voltage waveforms from a properly functioning throttle position sensor on VW Passat 1.8 1991
Malfunctioning TPS
Output voltage waveform from a malfunctioning throttle position sensor. The resistor track is worn and the wiper loses electrical contact in certain positions
Malfunctioning-throttle-position-sensor-2
Output voltage waveform from a malfunctioning throttle position sensor. The resistor track is worn and the wiper loses electrical contact in certain positions

Video

Waveform examples

The USB Oscilloscope program is required for waveform playback
Throttle position sensor Mitsubishi Lancer 1.6 2005
Throttle position sensor Toyota Avensis 1.8i 2007
Throttle position sensor BOSCH Mono-Motronic - VW Passat 1.8 1991
Faulty Throttle position sensor