System Overview: Introduction

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2013 Volvo C70, 2012 Volvo C70, 2011 Volvo C70, 2010 Volvo C70, and 2009 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

Brake control system Mark 60

The Mark 60 brake control system with the brake control module (BCM) is an electronic control system which prevents wheel lock up during braking (ABS). By preventing wheel lock up, steering control is maintained and maximum braking effect is utilized.

The brake control system is equipped with:

Anti-lock Braking System
Electrical Brake force Distribution (EBD) at the rear wheel brakes.

The brake control system, as a factory installed option, can be supplemented with:

STC (Stability and Traction Control)
DSTC (Dynamic Stability and Traction Control)
TRACS AWD (TRAction Control System All Wheel Drive), vehicles with AWD only.

EBD

The Electrical Brake force Distribution function is integrated in the ABS system. The function controls the braking forces electronically between the brake circuits front and rear wheels if the rear wheels are in danger of locking. This ensures optimal and stable braking.

STC

Stability and traction control system consisting of two parts:

Traction control . Traction control (TC) is a traction control system which is integrated in the ABS-system. The traction control system distributes the driven power between the wheels so that the wheel with the best road traction receives the greatest amount of driven power. The system is mainly designed to assist when moving off on slippery surfaces at speeds up to approximately 60 km/h. Traction control has only a very limited effect at speeds above 60 km/h. To prevent damage to the brake calipers and discs, traction control is disabled if the brake discs become too hot. The traction control function is always engaged when the ignition is switched on. This function cannot be disabled manually.
Stability control . The stability control (SC) system is integrated with the ABS system. It stabilizes the vehicle in the event of wheel spin. The brake control module (BCM) transmits a signal to the engine control module (ECM) to reduce engine torque until the slipping wheel(s) has/have stopped spinning. The stability function is always engaged when the ignition is switched on. Stability control can be engaged and disengaged manually using a switch on the tunnel console.

DSTC

DSTC (Dynamic Stability and Traction control) - a dynamic stability and traction control system which is integrated into the STC (stability and traction control) system.

The DSTC (Dynamic stability and traction control) system consists of the following:

Traction Control - This function is described above under STC - Traction control above.
Stability Control - This function is described above under STC - Stability control above.
AYC (Active Yaw Control) . The system is based upon a number of sensors which sense the driver's steering movements (steering wheel angle) and the directional, both straight and lateral, movement of the car. This information is used to correct the car in the event of oversteer or understeer.

DSTC is always engaged when the ignition is switched on. Stability control can be engaged and disengaged manually using a switch on the tunnel console. The same switch can be used to set the sensitivity of active yaw control (AYC). It can be either in normal mode or in wide slip mode.

TRACS AWD

This function is described in STC (STABILITY AND TRACTION CONTROL) SYSTEM . The TRACS AWD-function is always engaged when the ignition is switched on. (this function cannot be disabled manually).