Checking the connectors and the boost pressure system

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 OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Ignition off.
Check the connector on the boost pressure sensor. Check for contact resistance and oxidation according to Contact resistance and oxidation .

Release the boost pressure control (BPC) valve according to Checking and adjusting the boost pressure control (BPC) valve on the turbocharger (TC) . Check that the boost pressure control (BPC) valve does not stick in the closed position.

Check the turbocharger (TC) according to Checking boost pressure with manometer while test driving the car . Check in particular the hoses and the function of the pressure regulator.

Try a new boost pressure sensor if no fault is found during the above fault-tracing.

Remedy as necessary.

Other information
- See Boost pressure sensor 1, replacing
Fig 2: Identifying Boost Pressure Sensor Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Ohmmeter
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying Boost Pressure Sensor
Courtesy of VOLVO CARS OF NORTH AMERICA.

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Refer to Verification