Genuine Volvo Throttle Position Sensor

Volvo Throttle Position Sensor Parts and Q&A

• Throttle Position Sensor
  1336385
  Q: What are the functions and testing procedures of the Throttle Position Sensor on Volvo 960?

  A:

  The Throttle Position (TP) sensor is a potentiometer whose value gives a signal to the ECM proportional to the position of the throttle plate and is mounted on the side of the throttle body and coupled to the throttle plate shaft. It monitors the throttle plate movement and position and transmits an electrical signal to the ECM which adjusts the air/fuel mixture, spark timing and EGR operation based on engine load at various throttle positions. The TP sensor cannot be adjusted. To test the sensor, make sure the engine is OFF and the ignition is ON and then test the voltage at the signal return circuit with a DVOM and it should be between 0.2 and 1.4 volts at idle. As the throttle pulley is moved to the wide open throttle position (WOT), the voltage should increase to slightly less than 4.8 volts. If no voltage is present, check the wiring harness for supply voltage (5.0 volts), and ground (0.3 volts or less). If supply voltage and ground, but no output voltage from the TP sensor, replace it, if they do not meet the specifications, requires repairs to the harness or ECM. For removal, disconnect the negative battery cable, remove any components necessary to get to the sensor, disconnect the sensor connector, and remove the mounting screws to remove the sensor. For installation, place the sensor on the throttle plate shaft, making sure it fits properly, tighten mounting screws, reconnect sensor connector, reinstall parts cut off and reconnect negative battery cable.