Diagnostics And Services: Activations

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: Control Module Activation Of Components

Courtesy of VOLVO CARS OF NORTH AMERICA.

Wit this service it is possible to trigger (activate) the components that are connected to the control module. Examples of components are:

Relays
Solenoids
Lock motors
Damper motors
Signals to other control modules.

NOTE: If a malfunction is detected, diagnostic trouble code is stored and emergency functions or modes, etc. are activated to "protect" the system, the control module can prevent activation.

Depending on the system, the control module or diagnostics tool can perform activations in different ways, for some the component is activated according to a certain pattern, e. g., OFF, ON, OFF, ON, OF, ON, etc. in a sequence.

For other systems, the component is activated, e. g., ON, and remain on until the activation is stopped.