Anti-lock Braking System (ABS) (06.09)
Brake system (06.00)
6-6-2
Workshop Manual
October 2005
difference between the ideal and actual response within a
tolerance band. This directly influences the forces on the
tires to generate a corrective yaw moment to reduce the side
forces of the tires where appropriate
System Overview
The DSC system embraces capabilities far beyond that of
ABS, or ABS and traction control combined, while relying on
the components of these systems. It also incorporates these
additional sensors for measuring the vehicle’s motion and
brake system pressure:
Yaw rate sensor -
located centrally on the transmission
tunnel.
Lateral acceleration sensor -
integrated with the yaw rate
sensor.
Steering angle sensor -
located on the upper steering
column.
Pressure transducer -
located on master cylinder.
The ABS / DSC module supports data exchange with other
vehicle electronic systems via the CAN network; the module
also enables diagnostic interrogation using WDS.
The following components register driver demand and the
ABS / DSC module processes their signals as a basis for
defining an ideal response:
PCM -
position of accelerator pedal.
Brake master cylinder pressure transducer -
driver’s
braking effort.
Steering angle sensor -
position of steering wheel.
There are many supplementary parameters also included in
the processing calculations these include the coefficient of
friction and vehicle speed. The ABS / DSC module monitors
these factors based on signals transmitted by the sensors for:
• Wheel speed
• Lateral acceleration
• Brake pressure
• Yaw rate
Using these parameters, the function of the ABS / DSC
module is to determine the current vehicle status based on
the yaw-rate signal and the slip as estimated by the ABS /
DSC module. It then maintains the vehicle response within
a tolerance of the ‘normal’ behaviour, which is easily
controlled by the driver.
In order to generate the desired yaw behaviour the ABS /
DSC module controls the selected wheels using the ABS
hydraulic system and engine control system. In the event of
engine intervention, the ABS / DSC module calculates the
torque which should be supplied by the engine to the
wheels, and relays this request signal to the PCM which
implements the torque request.
The PCM receives signals from the DSC system via the CAN
bus and reduces engine torque as follows:
• The throttle is positioned to provide the requested engine
target torque.
• During the transient phase of torque reduction caused by
mechanical and combustion delays, other alternative
torque reduction methods are used to provide a quicker
response.
• The ignition is retarded and / or the fuel is cut-off at the
injectors at selected cylinders.
• Ignition and fuelling are reinstated when the engine
torque reaches the requested value
Operation Summary
• DSC is switched ‘On’ when the engine is started
• When the system is operating, the DSC light in the
instrument cluster will flash, at the rate of twice a second
• DSC can be switched ‘Off / On’ by pressing the DSC
switch
• The DSC light in the instrument cluster will illuminate
continuously when the system is switched ‘Off’.
• ‘DSC OFF’ will be displayed in the message centre right to
indicate the system has been switched ‘Off’
• A malfunction in the traction control system will be
indicated to the driver by the following:
• The DSC light in the instrument cluster will illuminate
continuously
• The message ‘DSC NOT AVAILABLE’ will be displayed
in the message centre right
• If vehicle speed control is engaged it will automatically
disengage when traction control is operating.
Traction Control
Traction control is a function of DSC, and is operated in
association with DSC. Traction control prevents excessive
wheel-spin at standing starts, or during acceleration. Wheel-
spin is usually caused by excessive use of the accelerator
pedal, or slippery, loose or bumpy road surfaces. To prevent
excessive wheel-spin and maintain vehicle stability such
situations are overcome by the intervention of the traction
control system by:
• Braking the driven-wheel when it starts to slip
• And / or adapting the engine torque to a level
corresponding to the traction available on the road
surface.
Functional Description
Traction control uses the ABS electronic and mechanical /
hydraulic hardware with additional valves to control the
braking pressure at the calipers. An engine interface also
enables the engine to respond to torque reduction requests
from the traction control. As with ABS, the signals from the
wheel-speed sensors are supplied to the ABS module, where
they are used to calculate the wheel-slip of the individual
wheels. Traction control intervention is initiated if the slip at
one of the wheels is excessive.
Summary of Contents for V8 Vantage
Page 1: ...Workshop Manual Issue 1 ...
Page 15: ...Body Structure 01 01 Body System 01 00 1 1 4 Workshop Manual October 2005 ...
Page 17: ...Front End 01 02 Body System 01 00 1 2 2 Workshop Manual October 2005 ...
Page 27: ...Interior Trim 01 05 Body System 01 00 1 4 8 Workshop Manual October 2005 ...
Page 31: ...Mirrors 01 09 Body System 01 00 1 6 2 Workshop Manual October 2005 ...
Page 33: ...Seating 01 10 Body System 01 00 1 7 2 Workshop Manual October 2005 ...
Page 51: ...Handles and Lock Mechanisms 01 14 Body System 01 00 1 10 4 Workshop Manual October 2005 ...
Page 57: ...Wipers and Washer System 01 16 Body System 01 00 1 11 6 Workshop Manual October 2005 ...
Page 61: ...Bumpers 01 19 Body System 01 00 1 12 4 Workshop Manual October 2005 ...
Page 88: ...Engine Assembly 03 00 Engine 03 00 3 1 10 Workshop Manual October 2005 ...
Page 94: ...Engine Structure 03 01 3 2 6 Workshop Manual October 2005 ...
Page 98: ...Lubrication System 03 02 Engine 03 00 3 3 4 Workshop Manual October 2005 ...
Page 116: ...Fuel Charging System 03 04 3 5 8 Workshop Manual October 2005 ...
Page 120: ...Engine Cranking System 03 06 3 7 2 Workshop Manual October 2005 ...
Page 122: ...Ignition System 03 07 Engine 03 00 3 8 2 Workshop Manual October 2005 ...
Page 126: ...Emission Control 03 08 Engine 03 00 3 9 4 Workshop Manual October 2005 ...
Page 128: ...Valve Train 03 09 Engine 03 00 3 10 2 Workshop Manual October 2005 ...
Page 132: ...Engine Sealing 03 10 Engine 03 00 3 11 4 Workshop Manual October 2005 ...
Page 134: ...Power Conversion 03 11 Engine 03 00 3 12 2 Workshop Manual October 2005 ...
Page 136: ...Air Charging 03 12 Engine 03 00 3 13 2 Workshop Manual October 2005 ...
Page 142: ...Engine Management System 03 14 Engine 03 00 3 15 4 Workshop Manual October 2005 ...
Page 144: ...Throttle Control 03 16 Engine 03 00 3 16 2 Workshop Manual October 2005 ...
Page 159: ...Rear Suspension 04 02 Suspension 04 00 4 3 6 Workshop Manual October 2005 ...
Page 169: ...Shock Absorber System 04 03 Suspension 04 00 4 4 10 Workshop Manual October 2005 ...
Page 193: ...Rear Disc Brakes 06 04 Brake system 06 00 6 2 4 Workshop Manual October 2005 ...
Page 205: ...Brake Actuation System 06 06 Brake System 06 00 6 4 8 Workshop Manual October 2005 ...
Page 217: ...Transmission Cooling 07 02 Transmission 07 00 7 1 4 Workshop Manual October 2005 ...
Page 225: ...Manual Transmission 07 03 Transmission 07 00 7 2 8 Workshop Manual October 2005 ...
Page 259: ...Power Steering 11 02 Steering 11 00 11 2 4 Workshop Manual October 2005 ...
Page 270: ...Body Ventilation system 12 01 Climate Control 12 00 12 1 6 Workshop Manual October 2005 ...
Page 272: ...Heater System 12 02 12 2 2 Workshop Manual October 2005 ...
Page 297: ...Horn Subsystem 13 06 Information Gauge and Warning 13 00 13 2 2 Workshop Manual October 2005 ...
Page 306: ...Battery System 14 01 Power Supply 14 00 14 1 8 Workshop Manual October 2005 ...
Page 316: ...Antenna 15 02 Vehicle Entertainment 15 00 15 2 2 Workshop Manual October 2005 ...
Page 326: ...Interior Lighting 17 02 Lighting 17 00 17 2 2 Workshop Manual October 2005 ...
Page 330: ...Lighting Mechanisms 17 04 Lighting 17 00 17 4 2 Workshop Manual October 2005 ...
Page 355: ...Circuit Diagrams ...
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Page 393: ...Active Anti Theft System 19 01 Electronic Features 19 00 19 1 6 Workshop Manual October 2003 ...