Checking the fuel pressure sensor

HINT: The method below is used to check whether the diagnostic trouble code (DTC) was caused by a faulty fuel pressure sensor. This can be done by checking whether the fuel pressure sensor signal (displayed in VIDA) is unstable, while the actual fuel pressure (displayed on a manometer connected to the wiring for the fuel injection system) is stable. 

• To connect the manometer, see Fuel pressure gauge
• Run the engine to operating temperature. Allow the engine to idle
• air conditioning (A/C) off
• Read off the relative fuel pressure.

  The relative fuel pressure is calculated from the fuel pressure sensor and the atmospheric pressure sensor signal (= absolute pressure minus atmospheric pressure).

  Check the value on the manometer and the value displayed in VIDA. If the fuel pressure sensor signal (displayed in VIDA) is unstable while the actual fuel pressure (displayed on the manometer connected to the wiring for the fuel injection system) is stable, this indicates that the circuit for the fuel pressure sensor is defective.

  Fig 1: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 2: Identifying Fuel Pressure Sensor

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Are the values equal? 

• YES 

  Refer to Checking components 

• NO 

  Refer to Checking components and wiring 

HINT: The method below is used to check whether the diagnostic trouble code (DTC) was caused by a faulty fuel pressure sensor. This can be done by checking whether the fuel pressure sensor signal (displayed in VIDA) is unstable, while the actual fuel pressure (displayed on a manometer connected to the wiring for the fuel injection system) is stable. 

• To connect the manometer, see Fuel pressure gauge
• Run the engine to operating temperature. Allow the engine to idle
• air conditioning (A/C) off
• Read off the relative fuel pressure.

  The relative fuel pressure is calculated from the fuel pressure sensor and the atmospheric pressure sensor signal (= absolute pressure minus atmospheric pressure).

  Check the value on the manometer and the value displayed in VIDA. If the fuel pressure sensor signal (displayed in VIDA) is unstable while the actual fuel pressure (displayed on the manometer connected to the wiring for the fuel injection system) is stable, this indicates that the circuit for the fuel pressure sensor is defective.

  Fig 1: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 2: Identifying Fuel Pressure Sensor

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Are the values equal? 

• YES 

  Refer to Checking components 

• NO 

  Refer to Checking components and wiring