Checking components

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 that the air flow through the hoses from the upper rear connection on the leak diagnostic pump to the intake manifold connection (1) is unimpeded. Check that there is no leakage between the connections
NOTE:
Air can only flow from the leak diagnostic pump to the intake manifold.
Check the function of the non-return valve (4). See the arrow on the non-return valve
Remedy as necessary.

Fig 2: Identifying Non-Return Valve (2)
Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected?

YES
Refer to Verification
NO
Refer to Replacing the component