Checking the idle air control (IAC) valve

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 Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

Idle air control (IAC) valve connector disconnected.
Connect an ohmmeter between idle air control (IAC) valve connector terminals 1 and 2.

Fig 2: Identifying Idle Air Control (IAC) Valve Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

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

The ohmmeter should read 9-11 Ω.

OK
Refer to Checking the power supply
NOT OK
Refer to Defective idle air control (IAC) valve