Checking the boost pressure sensor signal

WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition on
Read off the boost pressure sensor and atmospheric pressure sensor values
Check that the boost pressure sensor value is within 200 mbar of the atmospheric pressure sensor value. The atmospheric pressure sensor value is used as a reference value for this test.
Select one of the following alternatives to continue:
1. The boost pressure sensor value is more than 200 mbar higher than the atmospheric pressure sensor value
  Refer to Checking the wiring
2. The boost pressure sensor value is approximately the same as the atmospheric pressure sensor value.
  Refer to Checking the connectors and the boost pressure system
Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Boost Pressure Sensor
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS OF NORTH AMERICA.

Reinstall the connector
Ignition on.
Read off the boost pressure sensor and atmospheric pressure sensor values.

Check that the boost pressure sensor value does not deviate from the atmospheric pressure sensor value by more than 200 mbar. The atmospheric pressure sensor value is used as a reference value for this test.

Try a new boost pressure sensor if the boost pressure sensor value does not correspond to the atmospheric pressure sensor value to an accuracy of 200 mbar.

Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Boost Pressure Sensor
Courtesy of VOLVO CARS OF NORTH AMERICA.

Continue
Refer to Verification