2010 ASTON MARTIN V8 VANTAGE instrument cluster

Contents
Issue 5, January 2010 Workshop Manual 0-0-3
V8 Vantage Workshop Manual
Contents
IntroductionWelcome .............................................................. 0-0-6
Safety Precautions ................................................. 0-0-7
Lifting and Jacking ................................................. 0-0-9
Vehicle Recovery ................................................ 0-0-10
Vehicle Identification Number ............................ 0-0-11
Body System (01.00) Body Structure (01.01) .......................................... 1-1-4
Front End System (01.02) ...................................... 1-2-1
Body Closures (01.03) ........................................... 1-3-1
Interior Trim (01.05) ............................................. 1-4-1
Exterior Trim (01.08) ............................................. 1-8-1
Mirrors (01.09) ...................................................... 1-9-1
Seating (01.10).................................................... 1-10-1
Glass, Frame and Mechanism (01.11) .................. 1-11-1
Instrument Panel (IP) (01.12) . .............................. 1-12-1
Handles and Lock Mechanisms (01.14) ............... 1-14-1
Wipers and Washer System (01.16)..................... 1-16-1
Convertible Roof and Roof Opening
Subsystem (01.17)................ ...............................1-17-1
Bumpers (01.19) ................................................. 1-19-1
Restraining Devices (01.20) .... ............................. 1-20-1
Frame and Mounting (02.00) Subframes (02.03) ................................................. 2-1-2
Engine System (03.00) Engine Assembly....................................................3-0-3
Engine Structure (03.01)........................................ 3-1-1
Lubrication System (03.02).................................... 3-2-1
Cooling System (03.03) ......................................... 3-3-1
Fuel Charging System (03.04) ................................ 3-4-1
Accessory Drive System (03.05)............................. 3-5-1
Engine Cranking System (03. 06) ............................ 3-6-1
Valve Train (03.09) ............................................... 3-9-1
Engine Sealing (03.10)......................................... 3-10-1
Power Conversion (03.11)................................... 3-11-1
Evaporative Emissions (03.13) ............................. 3-11-1
Engine Management System (0 3.14).................... 3-14-1
Throttle Control (03.16) ...... ................................ 3-16-1
Foot Operated Control (03.18)............................ 3-18-1
Suspension (04.00) Road Wheel Alignment (04.00) ............................. 4-0-2
Front Suspension (04.01)....................................... 4-1-1
Rear Suspension (04.02)........................................ 4-2-1
Shock Absorber System (04.03) ............................. 4-3-1
Road Wheels and Tyres (04.04) ............................ 4-4-1
Driveline (05.00) Driveshaft (05.01) ................................................. 5-1-2
Halfshafts (05.05) .................................................. 5-2-1 Brake System (06.00)
Front Disc Brake (06.03) ....................................... 6-3-2
Rear Disc Brakes (06.04) ....................................... 6-4-1
Hand Brake (06.05) .............................................. 6-5-1
Brake Actuation System (06.06 ) ............................ 6-6-1
Power Brake System (06.07) ................................. 6-7-1
Anti-lock Braking System (06.09)........................... 6-9-1
Transmission (07.00) Transmission Cooling (07.02) ................................ 7-0-2
Manual Transmission (07.03) ................................ 7-3-1
Automatic Control System (07.05)......................... 7-5-1
Manual Control System (07.06) ............................. 7-6-1
Automatic Shifting Subsytem (07.11) .................. 7-11-1
Clutch (08.00) Clutch Controls (08.02) ......................................... 8-1-2
Exhaust (09.00) Exhaust Overview ................................................. 9-1-2
Silencer Assembly (09.01) ..................................... 9-1-3
Pipes and Supports (09.03) ................................... 9-2-1
Exhaust Protection (09.04) .................................... 9-3-1
Fuel (10.00) Fuel Tank and Lines (10.01) ................................ 10-1-2
Steering (11.00) Steering Gear (11.01) .......................................... 11-1-2
Power Steering (11.02)........................................ 11-2-1
Steering Column (11.04) ..................................... 11-4-1
Steering Column Switches (1 1.05) ....................... 11-5-1
Steering Wheel (11.06) ....................................... 11-6-1
Climate Control (12.00) Body Ventilation system (12.01) .......................... 12-1-2
Heater System (12.02) ........................................ 12-2-1
Air Conditioning (A/C) System (12.03) ................. 12-3-1
Information, Gauge and Warning (13.00) Instrument Cluster (13.01) .................................. 13-1-2
Power Supply (14.00) Battery System (14.01) ........................................ 14-1-2
Alternator and Regulator System (14.02) ............. 14-2-1
Vehicle Entertainment (15.00) Audio System (15.01)................................ ..........15-1-2
Antenna (15.02).................................................. 15-2-1
Vacuum Distribution (16.00) Body Vacuum System (16.01) ............................. 16-1-2
Lighting (17.00) Front Lights (17.01) ............................................. 17-1-2
Interior Lighting (17.02) ...................................... 17-2-1
Rear Lights (17.03) .............................................. 17-3-1
Lighting Mechanisms (17.04). .............................. 17-4-1

1-1-2 Workshop Manual Issue 5, January 2010
RH/LH Seat Switchpack Assembly - Renew...........7-13
Lumbar Pump for the Front Seat (From 08MY)
- Remove and Install.............................................7-13
Lumbar Valve for the Front Seat (From 08MY)
- Remove and Install.............................................7-14
Lumbar Bladder for the Front Seat (From 08MY)
- Remove and Install.............................................7-14
Glass, Frame and Mechanism (01.11) .................. 1-8-1 Description .............................................................8-1 Frameless doors......................................................8-1
Specifications .........................................................8-1
Maintenance ...........................................................8-1 Glass Regulator - Renew .........................................8-1
RH/LH Door Glass - Renew ....................................8-2
Door Glass - Adjust/Reset .......................................8-3
Front Windshield - Renew ......................................8-3
Rear Windshield - Renew .......................................8-4
Quarter Window Glass - Renew .............................8-6
Passenger Window Lift Switch - Renew ..................8-6
Driver Window Lift Switch - Renew........................8-7
Instrument Panel (IP) (01.12)................................ 1-9-1 Specifications ..........................................................9-1
Maintenance ...........................................................9-1 Instrument Panel - Renew ......................................9-1
Airbag Panel and Door Assembly - Renew ..............9-6
Glovebox Assembly - Renew ..................................9-6
Instrument Centre Panel Asse mbly - Renew............9-7
Knee Protector - Renew .........................................9-7
Instrument Panel As sembly - Renew .......................9-7
Cluster Bezel Panel - Renew .................................9-10
Driver Panel Assembly - Renew ............................9-10
Instrument Panel Bezel A ssembly (With Sat. Nav.)
- Renew ...............................................................9-11
Instrument Panel Bezel Assembly
(Without Sat. Nav.) - Renew .................................9-11
Rear Console Panel Assembly - Renew .................9-12
Armrest Pad Assembly - Renew ............................9-13
Console Panel Assembly - Renew .........................9-13
RH/LH Rear Console Pa nel Assembly - Renew
(Roadster Only) ....................................................9-13
Centre Console Panel - Remove and Install
(Coupe Only) .......................................................9-15
Centre Console Panel - Remove and Install
(Roadster Only) ....................................................9-19
RH/LH Lower Quarter Panel Assembly - Renew
(Roadster Only) ....................................................9-29
Handles and Lock Mechanisms (01.14) .............. 1-10-1 Description ...........................................................10-1 Vehicle Key/Remote Transmitter...........................10-1
Central Locking System ........................................10-1
Remote Transmitter ..............................................10-1
Fuel Filler Assembly ..............................................10-1
Boot Emergency Release ....... ...............................10-1
Specifications ........................................................10-2
Maintenance .........................................................10-2 Ignition Cylinder Lock - Re new.............................10-2
RH/LH Front Door Latch As sembly - Renew .........10-2
Bonnet Latch Assembly - Renew...........................10-3
Hood Release Cable Assembly - Renew (Roadster Only) .................................................... 10-3
Bonnet Secondary Latch Asse
mbly - Renew ......... 10-4
Tailgate Latch and Cable Assembly - Renew ......... 10-4
Fuel Filler Actuator Assembly - Renew
(Roadster Only) .................................................... 10-4
Fuel Filler Release Cable - Renew (Roadster Only) 10-5
Fuel Flap Release Switch - Renew ........................ 10-6
RH/LH Tonneau Latch Motor - Renew
(Roadster Only) .................................................... 10-7
RH/LH Tonneau Latch - Renew (Roadster Only) ... 10-7
RH/LH Tonneau Cover Striker Assembly
- Renew (Roadster Only) ...................................... 10-8
Tailgate Latch Assembly-Renew (Roadster Only) ... 10-8
Wipers and Washer System (01.16) ....................1-11-1 Headlamp Washing .............................................. 11-1
Specifications ........................................................ 11-2
Maintenance ......................................................... 11-2 Windscreen Wiper Motor As sembly - Renew ....... 11-2
Wiper Linkage Assembly - Renew ........................ 11-2
Windshield Wash Tube - Renew .......................... 11-2
Windscreen Reservoir and Motor Assembly
- Remove and Install ............................................ 11-3
Low Level Water Sensor - Remove and Install ...... 11-4
Headlamp Wash Motor and Pump Assembly
- Renew ............................................................... 11-5
Headlamp Wash Tube Assembly - Renew ............ 11-5
Washer Fluid Reservoir - Renew........................... 11-6
Convertible Roof and Roof Opening Subsystem
(01.17)..................................................................1-12-1 System Description .............................................. 12-1
Maintenance ......................................................... 12-2 Hood Assembly-Renew ........................................ 12-2
Canopy Cover - Renew ........................................ 12-5
Header Latch Motor - Renew ............................... 12-9
Hydraulic Main Actuator Cy linder - Renew .......... 12-9
Hydraulic Tensrod Cylinder - Renew .................. 12-10
Hydraulic Tonneau Cylinder - Renew................. 12-11
Convertible Top ECU - Renew ........................... 12-13
Hydraulic Pump - Renew ................................... 12-13
Hydraulic Lock Valve - Renew............................ 12-16
RH/LH Front Cantrail Seal - Spare Part
- Renew ............................................................. 12-18
RH/LH Front Cantrail Seal Spare Part Kit
- Renew ............................................................. 12-18
RH/LH Middle Cantrail Seal Spare Part
- Renew ............................................................. 12-18
RH/LH Middle Cantrail Seal Spare Part Kit
- Renew ............................................................. 12-19
Rear Seal Spare Part Assembly Kit - Renew ......... 12-20
LH Fully Automatic Latching Kit - Renew............ 12-21
RH Fully Automatic Latching Kit - Renew ........... 12-22
Convertible Roof Hydraulic Pump
- Check Fluid Level ............................................ 12-23
Cantrail Cover Trim - Renew .............................. 12-25
B-Post Trim Cover - Renew ................................ 12-25
Tonneau Cover - Renew .................................... 12-27
LH Front Main Hydraulic Cylinder Pipe
- Renew ............................................................. 12-29
LH Rear Main Hydraulic Cylinder Pipe

Seating (01.10)
Body System (01.00)
Issue 4, November 2008 Workshop Manual 1-7-13
11. Secure cover to bottom of seat back shell.
12. Secure cover to seat back shell (studs and velcro).
13. Install airbag module (bolt x1) (torque).
14. Install multiplug bracket fixing.
15. Connect airbag multiplu g and secure to bracket.
16. Install lever cover.
17. Install release lever.
18. Install seat 6 way height adjuster (see Workshop Manual procedure 01.10.AE 6 Way Height Adjuster - Inc.
Motors - Renew).
RH/LH Seat Switchpack Assembly -
Renew
Removal
1. Remove instrument panel bezel assembly (see Workshop Manual procedure 01.12.AV Bezel Assembly
- Instrument Panel - Remove for Access and Refit).
2. Remove console panel assembly (see Workshop Manual procedure 01.12.DB Panel Assembly Console - Renew).
3. Remove instrument cluster hood (6 clips)
4. Remove passenger upper ou ter panel assembly (see
Workshop Manual procedure 01.12.AE Panel Assembly
- IP - Upper - Passenger - Renew).
5. Remove passenger panel assembly (4 clips and 4 screws)
6. Remove driver's upper inner panel assembly (5 clips)
7. Remove driver's upper outer panel assembly (4 clips)
8. Remove driver's panel assembly (4 clips and 3 screws)
9. Remove receiver and audio media system panel screws (x4), disconnect multiplugs (x12).
10. Pull back carpet and disconnect seat adjust switch multiplugs (x6), release harness clip (x2)
11. Remove instrument centre panel assembly
12. Remove seat adjust switch (screws x4) (see Figure 1).
Installation
1. Install seat adjust switch.
2. Install instrument centre panel assembly
3. Connect seat adjust switch multiplugs (x6), install
harness clip (x2) and carpet.
4. Install receiver and audio media systems panel (12 multiplugs and 4 screws)
5. Install driver's panel asse mbly (4 clips and 3 screws)
6. Install driver's upper oute r panel assembly (4 clips)
7. Install driver's upper inne r panel assembly (5 clips)
8. Install passenger's panel assembly (4 clips and 4 screws)
9. Install passenger's upper outer panel assembly (see
Workshop Manual procedure 01.12.AE Panel Assembly
- IP - Upper - Passenger - Renew).
10. Install instrument cluster hood (6 clips)
11. Install console panel assemb ly (see Workshop Manual
procedure 01.12.DB Panel Assembly Console - Renew).
12. Install instrument panel be zel assembly (see Workshop
Manual procedure 01.12.AV Bezel Assembly -
Instrument Panel - Remove for Access and Refit).
Lumbar Pump for the Front Seat (From
08MY) - Remove and Install
Remove
1. Remove the applicable front seat (Refer to ’RH/LH Front Seat - Remove and Install’, page 1-7-1).
2. Remove the cover for the squab from the seat (Refer to ’Front Seat Squab Cover Assembly (Each, from 08MY) -
Remove and Install’, page 1-7-3).
3. Move the lumbar inlay to give access.
4. Remove the tape that attaches the air hoses for the bladder into the lumbar inlay.
5. Move the air pump out of the lumbar inlay.
6. Disconnect the air hoses from the pump.
7. Disconnect the electrical connector for the pump.
8. Remove the pump assembly.
Install
1. Connect the the air hose to the pump.
2. Put the air valve in position into the inlay.
3. Connect the electrical connector for the pump.
4. Put the pump into the correct position in the lumbar inlay.
5. Use applicable tape to hold the hoses into the lumbar inlay.
6. Put the lumbar inlay into the correct position.
Repair Operation Time (ROT)
A0110231
Repair Operation Time (ROT)

Instrument Panel (IP) (01.12)
Body System (01.00)
Issue 5, January 2010 Workshop Manual 1-9-7
Instrument Centre Panel Assembly -
Renew
1. Remove instrument panel bezel assembly (see Workshop Manual procedure 01.12.AV Bezel Assembly
- Instrument Panel - Remove for Access and Refit).
2. Remove console panel assembly (see Workshop Manual procedure 01.12.DB Panel Assembly Console - Renew).
3. Remove instrument cluster hood (6 clips)
4. Remove passenger upper ou ter panel assembly (see
Workshop Manual procedure 01.12.AE Panel Assembly
- IP - Upper - Passenger - Renew).
5. Remove passenger panel assembly (4 clips and 4 screws)
6. Remove driver's upper inner panel assembly (5 clips)
7. Remove driver's upper outer panel assembly (4 clips)
8. Remove driver's panel assembly (4 clips and 3 screws)
9. Remove receiver and audio media system panel screws (x4), disconnect multiplugs (x12).
10. Pull back carpet and disconnect seat adjust switch multiplugs (x6), release harness clip (x2)
11. Remove instrument centre panel assembly
12. Remove seat adjust switches (screws x8).
Installation
1. Install seat adjust switches (screws x8).
2. Install instrument centre panel assembly
3. Connect seat adjust switch multiplugs (x6), install harness clip (x2) and carpet.
4. Install receiver and audio media systems panel (12 multiplugs and 4 screws)
5. Install driver's panel assembly (4 clips and 3 screws)
6. Install driver's upper oute r panel assembly (4 clips)
7. Install driver's upper inne r panel assembly (5 clips)
8. Install passenger's panel assembly (4 clips and 4 screws)
9. Install passenger's upper outer panel assembly (see Workshop Manual procedure 01.12.AE Panel Assembly
- IP - Upper - Passenger - Renew).
10. Install instrument cl uster hood (6 clips)
11. Install console panel asse mbly (see Workshop Manual
procedure 01.12.DB Panel Assembly Console - Renew).
12. Install instrument panel be zel assembly (see Workshop
Manual procedure 01.12.AV Bezel Assembly -
Instrument Panel - Remove for Access and Refit).
Knee Protector - Renew
Removal
1. Remove driver's lower panel assembly (7 clips) and disconnect air temperature pipe.
2. Disconnect footwell light and remove unit from panel.
3. Mark one socket for relocation and remove diagnostic sockets (x2) from panel.
4. Remove pop-rivets (x5), sc rews (x4) and remove panel.
Installation
1. Align knee protector panel in position and secure with
screws (x4).
2. Install pop-rivets (x5).
3. Install diagnostic sockets (x2) (ensure marked socket is in correct location).
4. Install footwell light and reconnect multiplug.
5. Install driver's lower panel assembly (7 clips) and connect air temperature pipe.
Instrument Panel Assembly - Renew
Removal
1. Remove Instrument pane l assembly (see Workshop
Manual procedure 01.12.AB Instrument Panel - Facia
Assembly - Remo ve for Access and Refit).
2. Remove steering column (bolts x4, multiplugs x5).
3. Remove passenger air bag module (screws x4).
4. Remove centre speaker (screws x2) and unclip harness (see Figure 1).
Repair Operation Time (ROT)
Repair Operation Time (ROT)
Repair Operation Time (ROT)
A0112220

Instrument Panel (IP) (01.12)
Body System (01.00)1-9-10 Workshop Manual Issue 5, January 2010
Cluster Bezel Panel - Renew
Removal
1. Remove instrument cluster hood assembly (6 clips) (see Figure 1).
2. Remove driver's upper outer panel assembly (4 clips) (see Figure 2). 3. Remove driver’s upper inner panel assembly (5 clips)
(see Figure 3)
.
4. Remove instrument cluster bezel panel (5 screws) and
remove steering column cover (2 screws).
Installation
1. Install steering column cover to instrument cluster bezel panel (2 screws) and then install bezel to instrument
cluster (5 screws).
2. Install driver's upper inner panel assembly (5 clips).
3. Install driver's upper outer panel assembly (4 clips).
4. Install instrument cluster hood (6 clips).
Driver Panel Assembly - Renew
Removal
1. Remove instrument panel hood assembly (6 clips) (see
Figure 1)
Repair Operation Time (ROT)
Figure 3
Repair Operation Time (ROT)
ItemCode
Driver Panel Assembly-Renew 01.12.AU
Figure 1

Instrument Panel (IP) (01.12)
Body System (01.00)
Issue 5, January 2010 Workshop Manual 1-9-11
2. Remove driver's upper outer panel assembly (4 clips) (see Figure 2).
3. Remove driver's upper inner panel assembly (5 clips) (see Figure 3).
4. Remove driver's panel assembly (3 screws and 4 clips).
Installation
1. Install driver's panel assembly (3 screws and 4 clips).
2. Install driver's upper inne r panel assembly (5 clips).
3. Install driver's upper oute r panel assembly (4 clips).
4. Install instrument cluster hood assembly (6 clips).
Instrument Panel Bezel Assembly (With
Sat. Nav.) - Renew
Removal
1. Using tool (501 - 108), release instrument panel bezel
assembly clips (x4) from IP (restrain panel movement). 2. Disconnect multiplug (x1)
starter button and remove
panel assembly (s ee Figure 1).
3. Remove starter button from instrument panel bezel assembly.
4. Remove screws (x6) air vent s (x2) to bezel assembly and
remove air vents.
5. Remove screws (x11) satelli te navigation screen panel
from instrument pa nel bezel assembly.
6. Remove Satellite screen panel.
Installation
1. install satellite screen panel (screws x 11) to bezel assembly.
2. Install air vents (x2).
3. Install starter button.
4. Position panel assembly, co nnect multiplug (x1) starter
button.
5. Install panel and secure in clips (x4).
Instrument Panel Bezel Assembly
(Without Sat. Nav.) - Renew
Removal
1. Using tool (501 - 108), release instrument panel bezel assembly clips (x4) from IP (restrain panel movement).
Figure 2
Figure 3
Repair Operation Time (ROT)
Figure 1
Repair Operation Time (ROT)
A0112218

Road Wheels and Tyres (04.04)
Suspension (04.00)
May 2007 Workshop Manual 4-4-9
Tyre Pressure Sensing (Option)
Tyre pressure sensing monitors the vehicle tyre pressures
and feeds-back this info rmation to the driver.
Each road wheel is installed with a tyre pressure sensing
device which sends tyre pressu re information to a control
unit mounted in the centre, rear wall of the boot.
The control unit provides a
visual warning by illuminating
the tyre pressure warning lamp
(A) on the instrument panel if
any tyre pressure falls below
specification.
Pressure Sensing
with Winter Wheels
and Tyres
If the tyre pressure sensing option is installed on the vehicle,
the winter road wheel and tyre option with the tyre pressure
sensing system should be installed. The tyre pressure sensing
system will need to be programmed to recognize additional
tyres.
Wa r n i n g s
WAR NI NG
TYRE PRESSURE SENSING IS NOT INTENDED TO REPLACE DRIVER AWARENESS OF TYRE
PERFORMANCE OR THE NEED FOR RECOMMENDED WEEKLY CHECKS ON TYRE CONDITION AND
PRESSURE.
Each pressure sensing device
has a colour coded collar.
Ensure the coloured collars
are always installed in their
original positions, i.e. after
new tyres are installed.
Road wheelColour
Front right
Front Left
Rear Right
Rear Left Green
Red
Blue
Yellow
Instrument
Cluster
Lamp constant / Message ‘Check Tyres’.
Fault
Tyre pressure below specification.
Action
Reduce speed to 48 km/h (30 mph). Stop in safe place as
soon as possible.
One of the coloured LEDs on the control module will
illuminate to indicate which tyre requires inflating . The
LED colour corresponds to th e colour of the band below
each tyre valve cap. Inspect affected tyre. Re-inflate if
necessary. If on inspection the tyre is found to be OK,
continue at 48 km/h (30 mph) maximum.
Ensure that the coloured band remains in position.
Instrument
Cluster Lamp constant / Message ‘Check Tyres’.
Fault
Tyre transmitter fault.
Action
Reduce speed to 48 km/h (30 mph). Stop in safe place as
soon as possible.
Inspect affected tyre. Re-inflate if necessary.
If on inspection the tyre is found to be OK, continue at 48
km/h (30 mph) maximum.
Instrument
Cluster Lamp constant / Message ‘Tyre system
Fault’
Fault
Control module fault.
Action
Stop in safe place as soon as possible.
Check all tyres for flats. If OK, continue at 48 km/h (30
mph) maximum.

Anti-lock Braking System (ABS) (06.09)
Brake system (06.00)
6-9-2 Workshop Manual Issue 4, November 2008
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 measur ing the vehicle’s motion and
brake system pressure:
Ya w r a t e s e n s o r - 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 instru ment 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 instru ment 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 ex cessive use of the accelerator
pedal, or slippery, loose or bumpy road surfaces. To prevent
excessive wheel-spin and mainta in 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 calipe rs. 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.