Checking the Direct Output Of the Electric Auxiliary Pump

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 Special Tool And Electric Auxiliary Pump

Courtesy of VOLVO CARS OF NORTH AMERICA.

It is also possible to perform an independent check of the electric auxiliary pump.

Connect special tool 999 5230 to the electric auxiliary pump.

Start the electric auxiliary pump.

Stop the pump when negative pressure reaches 80 - 90 kPa.

The negative pressure should remain constant (maximum permissible pressure drop 3 kPa over 15 minutes).