Checking wiring and connectors

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 connectors for the boost pressure sensor and the control module. Check for contact resistance and oxidation according to Contact resistance and oxidation .

Remedy as necessary.

Fig 2: Identifying Engine Coolant Temperature (ECT) Sensor Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

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

Continue
Refer to Checking the signals for the boost pressure sensors