ASTON MARTIN V8 VANTAGE 2010 Workshop Manual

Wiring and Circuit Protection (18.01)
Electric Distribution/E lectronic Control (18.00)
18-1-2 Workshop Manual May 2007
Electric Distribution/Electronic Control (18.00)
Wiring and Circuit Protection (18.01)
Fuse Boxes
From the clean 12V output terminal of the battery
disconnect switch, electrical power is distributed to three
fuse boxes:
• Engine bay fuse box (LH side of engine bay on LH drive vehicles)
• Boot fuse box

Wiring and Circuit Protection (18.01)
Electric Distribution/Electronic Control (18.00)
May 2007 Workshop Manual 18-1-3
F26 20A Headlamp wash pump (HID Only)
F27 25A Spare
F28 10A Module - ABS/Key Reader and Steering angle sensors
F29 25A Spare
F30 5A Alternator battery sensing
F31 30A Heated front screen
F32 30A Wiper (slow)
F33 30A Wiper (fast)
F34 20A Heater Blower motor
F35 60A Cooling fan module
Central
Electronics
Module
Fusebox
Fuse/
RelayRatingFunction
F43 10A Multi media module display/Phone/GPS tuner/Media player
F44 10A Airbag module
F45 15A Accessory socket and illumination
F46 5A Driver Information/Master light switch/Glove box relay/Master lock switch Battery Off
switch/Boot release switch/Speaker-switch/
JBFB-R7/Centre console module/Bluetooth
module
F47 5A Interior lamps (front)/Seat switches/Fuel flap switch/glovebox switch/Rear power
illumination
F48 15A Windscreen wash pump
F49 10A Occupant detect (Driver and passenger seat)/Airbag module
F50
F51 10A Diagnostic connectors/Centre stack switches
F52 5A Start button
F53 10A Module - HID lighting
F54 10A Engine fuse box/Boot fuse box/Tyre pressure monitor module/Satellite navigation relay
F55
F56 10A Centre console module/Sounder module/
Hazard switch
F57 15A Diagnostic connectors/Brake pedal switch
F58 10A High beam (RH)
F59 10A High beam (LH)
F60 15A Drivers seat power (Heating)
F61 15A Passenger seat power (Heating)
F62 20A A/C module
F63 20A
F64 5A AM/FM receiver module/Traffic Monitoring Control module (TMC)
F65 5A Media player/Multi media module and display/Audio amplifier
F66 10A Centre console module/Infotainment control module
F67
F68
F69 5A BFB-R5
F70
F71
F72
F73
F74 15A Fuel pump
F75
F76
F77 15A Boot power socket
F78
F79 5A Reversing lamps/Module - Parking aid
F80 5A Battery ‘Off’ switch
F81 20A Ignition switch
F82 25A Passenger door module
F83 25A Driver door module
F84 25A Passenger seat power/Passenger seat switchpack
F85 25A Driver seat power/Driver seat switchpack
F86 5A Start button, Driver and passenger seats

Wiring and Circuit Protection (18.01)
Electric Distribution/E lectronic Control (18.00)
18-1-4 Workshop Manual May 2007
How to Read the Circuits
Below is a simple guide to what symbols mean on the circuit
diagrams. For some of the symbols there are descriptions as
to how they function.
Wires
Wires vary in size to allow diffe rent current to be carried. For
example a wire with a diamet er of 0.50mm (This is the
diameter of all the internal copper strands together) will
carry 11A (dependant on ambient temperature) whilst a wire
with a diameter of 2.00mm will carry 25A.
Twisted Wires
The ‘figure of 8’ shown on circuits as below denotes a
twisted wire and shows the wires that are twisted together.
A wire generates a certain amount of ‘electrical noise’ when
a current is passed through it. By twisting the 2 wires
together the ‘electrical noise’ is cancelled out on each wire
by the opposing wire. This is used more on sensors and
audio speakers.

Screened and Twisted Screen Wires
The signals through a wire can be affected by externally
generated electrical noise. To reduce the external
interference the wires are placed inside a conductive sleeve.
One end of the conductive sleeve is always open whilst the
other end can be terminated to a ground, to a component,
or left open.
Boot Fusebox
Fuse/

RelayRatingFunction
F1 5A Spare
F2 20A Spare
F3 30A Heated rear window
F4 20A Spare
F5 30A Spare
F6 20A Spare
F7 5A Battery disconnect switch (BDS) power
F8 20A Spare
F9 20A Tracker
F10 30A Spare
F11 20A Spare
F12 20A Spare
F13 10A Spare
F14 5A Rear parking assistance module (optional)
F15 5A Spare
F16 30A Spare
F17 5A Spare
F18 30A Audio amplifier
F19 5A Spare
F20 10A Canister vent
F21 30A Spare
F22 20A Exhaust by-pass and vacuum pump
Wire numbers have been deleted from the original
engineering circuits. This al lows the type size to be
increased for improved legibil ity of the service circuits.
173 WR 2.0
Wire No.
Colour
Size
908 GU MAPM 05
Wire No.
Colour
MAP (Defines twisted pair)
Size

Wiring and Circuit Protection (18.01)
Electric Distribution/Electronic Control (18.00)
May 2007 Workshop Manual 18-1-5
The symbol for the screen is an oval with the wires that are
to be screened inside it. The letters ‘SCR’ define the screen.
Controller Area Network (CAN)
Controller Area Network (CAN) is the wiring between
intelligent modules of the vehi cle. This wiring carries the
electronic data around the vehicle allowing the various
modules and components to interrogate the network and
read their specific data signals.
There are 2 different speeds of network.
Low speed - Transmits at 125,000 bits per second. Mainly
for body controller systems such as seats and doors
High speed - Transmits at 500,000 bits per second. Mainly
for engine management and powertrain associated systems
such as ABS.
All wiring in the CAN is twisted. The twisted wires always
consist of one wire with a black trace in it for the negative
side and one with a brown trace in it for the positive.
High Speed CAN wire
Low Speed CAN wire
The symbol below shows a module or a component
connector with the pin numbers that have CAN wires
coming from them.
‘CAN LS+’ - Low speed CAN positive side
‘CAN LS-’ - Low speed CAN Negative Side
To aid identification of the different speed CAN’s in the
vehicle different colours of wi re have been used, e.g. the
Low Speed Volcano is GB twisted with GN, the High Speed
Volcano is RB twisted with RN.
There is attached on a separate page a list for wire colour
abbreviations and what colour they refer to.
205 U MABC 05
Wire No.
Colour
MAB (Defines Screened)
Size

Wiring and Circuit Protection (18.01)
Electric Distribution/E lectronic Control (18.00)
18-1-6 Workshop Manual May 2007
Media Oriented System Transport
(MOST)
A fibre optic carries out a similar function to that of a wire in
that it transmits data signals. The differences being that
where a wire is made up of copper strands in an insulated
sleeve a fibre optic is a plasti c tube with a highly polished
reflective inside surface.
The fibre optic carries the data in the form of a pulse of light,
which is sent via an infrared transmitter and picked up at the
next component in the loop via an infrared receiver. The
light pulse is then converted to an electrical signal that is
used by that module or component.
The CAN sends signals around the vehicle where the
modules or components remove their specific signals. The
fibre optic is in a loop with the module components in that
loop, one fibre goes in and one fibre goes out. This is shown
below.
Connectors
There are 2 types of interconnect shown on the circuits.
Each connector is given a dedicated ‘C’ number. The
number after the dash is the pin number, also known as the
cavity number. The example below is C0582 that when
checked on the attached list refers to the CEM Connector
Cockpit 2 (C3).
The 1st type is shown for a connector t h a t is o n a m o d u l e o r
component with a mating harness connector attached to it.
The 2nd type is shown for a co nnector on a harness with the
mating connector on another ha rness. This is known as an
Inline . Again the above naming convention applies.
1FO
Fibre optic in harness
Fibre Optic
C0582 9
Connector C number
Connector pin / cavity number

Wiring and Circuit Protection (18.01)
Electric Distribution/Electronic Control (18.00)
May 2007 Workshop Manual 18-1-7
The terminals in a connector housing can have a special
coating on them. This coating if required is selected using
the following criteria.
• A specific coating requested by component / system owner.
Or
• The current passing through the terminal.
• The environment the connector is to be situated with respect to temperature.
• The open circuit voltage passing through the terminal at a given.
Depending on the above criteria the coating, if required, can
either be gold, silver, phosphor bronze. Generally tin is the
common plating on the terminals but there are some that are
gold. These are identified in the circuits with the letter ‘ G’
which stands for gold afte r the connector number. An
example of this is shown below.
Splices
A s p l ic e is u s e d w h e re m o r e t h a n 2 w i re s t h a t h a v e t h e s a m e
requirement i.e. they need the same signal and meet in the
same harness. In the example below the Front Position
Lamp-LH and Front Side marker-LH require the same
output signal from the CEM. Therefore the 2 wires for the
lamps are spliced into the output wire from the CEM on the
Forward Harness.
Tracing Spliced Wires
Some splices appear on pages as a wire that goes to one spot
and seems to terminate in space. An example of this is
shown below.
Splice Origin Page
(e.g.P9)
Other Page(s) on which the splice occurs .
A separate page is attached containing a list of splice
abbreviations and the harness to which they refer.
G
Gold plated pin
SPL1 FLL FOR
Splice No.
Associated name
Harness that the splice is on

Wiring and Circuit Protection (18.01)
Electric Distribution/E lectronic Control (18.00)
18-1-8 Workshop Manual May 2007
Relays
Another significant component in the circuits is a relay, this
is in simple terms a switch that operates on the principal of
electromagnetism. Below is the circuit symbol for a typical
relay. The relay shown below is a normally open relay in its
inoperative state i.e The arm is in the open position.
Relays can have either 4 or 5 terminals on the base. The
circuit of the relay is shown on the base or the side of the
housing. There are 2 types of numbering convention for the
relay terminals, both of which are shown below.
Below is a circuit diagram to show the function and
operation of a relay in a simple circuit.
The current from a battery for example flows through the
wires to the high power normally open switch (The arm
between pins 30 & 87A) and the low power coil (The box
between pins 85 & 86). As you can see in the example above
the lamp is in not illuminated, because the switch is open.
For the relay to operate there needs to be current flow
through the low power coil i.e Current in to the coil then
through to an earth. The current passes through the relay coil
and creates a magnetic field, this magnetic field is strong
enough to ‘grab’ the high power normally open switch.
The magnetic field pulls the switch from it’s normally open
contact to a normally closed contact. The normally closed
contact has a path to an earth, in this case it goes through a
lamp. The high power current then flows through the high power
normally open switch through the lamp and then to an earth.
This can be seen more clearly in the diagram below.Lamp
Illuminates
Busbars
A busbar is where a electrical
supply is fed into a conductive
bar, wire or pcb track and various modules or components
‘tap’ into this busbar to draw their required power. The
Central Electronic Module has 4 of these busbars internally,
each of which is supplied from an external power supply,
that supply can be a battery feed, ignition feed or a switched
supply.
The symbol shown below is the symbol used on the circuits
for a busbar, the number inside the box refers to the busbar
number in the Central Electronic Module.
Fuses
A fuse is a device used to protect a module or component
from excessive electrical current which can cause damage or
destroy that module or component. In practice the fuse is
placed in between the power source and the module or
component that is being protected.
The size or ‘Rating’ of the fuse in amps is calculated
according to the power requirements of the module or
component it is protecting with other factors being taken
into consideration. If the rating has been calculated correctly
then the fuse will ‘blow’ when excessive current passes
through it before any harm or permanent damage occurs to
the module or component it is protecting.

Wiring and Circuit Protection (18.01)
Electric Distribution/Electronic Control (18.00)
May 2007 Workshop Manual 18-1-9
In a correctly protected circuit, the fuse is placed ‘ Inline’
between the power source in this case the battery and the
lamp. If the lamp goes ‘short circuit’, a massive current will
begin to flow and the fuse will fail causing an open circuit.
The battery and wiring are protected from over current
damage.
Below is the fuse symbol as shown on the circuit diagrams.
The number above the fuse symbol is the fuse number;
allocated to this fuse. The number below the fuse symbol is
the rating.
Resistors
A resistor is an electronic component that by way of its
construction reduces the current flowing through it. A
resistors unit of measure is the Ohm.
The diagrams below show a resi stor and a variable resistor.
Variable Resistors
A variable resistor works in the same manner as a normal
resistor but the resistance values can fluctuate. The
construction of a variable resi stor depends upon its use and
environment.
One example is for the fuel tank level sensor. The tank full
level is 10 ohms and the tank empty level is 204 ohms, the
resistance will vary between 10 and 204 ohms depending on
how much fuel is in the tank.
Lamps
Below is the symbol for a light bulb, shown below the
symbol is the power of the bulb in watts.
Switches
There are numerous of types of switch, several of examples
are shown below.
Normally Open Switch
2 Position Switch
3 Position Switch
Motors and Pumps
The same symbol is used for a pump or a motor, the
description differentiates between them.
Pump

Wiring and Circuit Protection (18.01)
Electric Distribution/E lectronic Control (18.00)
18-1-10 Workshop Manual May 2007
Motor
Diodes
The simplest way of describing a diode is ‘a non return
valve’. The current will flow through the diode from the
anode to the cathode, due to the construction of it though
current cannot come back. Diodes are used to reduce the
possibilities of ‘back feed’. This is where current comes
through the circuit the wrong way for one reason or another.
Below is the circuit symbol for a diode.
Light Emitting Diode (LED)
The light emitting diode (LED) works on the same principal
as the diode. The main difference is that in the
manufacturing process one of the materials is replaced by
another. This replacement mate rial has certain properties
that when a certain voltage passes through it glows.
Transistor
A transistor in simplistic term s is a switch with no moving
parts. The ‘switching’ is controlled by electronics and
currents etc. rather than a physical switch being operated.
Below is the circuit symbol for it. The example shown below
is one of the most common basic type used called a
‘Bipolar’.
Field Effect Transistor (FET)
A field effect transistor (FET) is, in simplistic
terms, a switch with no moving parts. The
‘switching’ is controlled by electronics and
currents etc. rather than a physical switch
being operated. The main difference
between this and the type of transistor shown above is this
one operates using a magnetic field.
Earth / Ground
For an electrical current to ‘flow’ around a circuit it has to
start from a power source and go to an earth / ground. If
there are any breaks in this circ uit then current will not flow,
this is called an ‘Open circuit’
There are 2 types of earth, Signal Earth and Chassis Earth,
these are referred to sometimes as a Quiet Earth and Noisy
Earth respectively.
Some sensors for example specify a Signal / Quiet Earth.
While components such as pumps and motors can have a
Chassis / Noisy Earth. The reason behind this is that pumps,
motors and the like can generate ‘electrical noise’ by the
way of their operation. Some of this ‘electrical noise can be
transferred through wires, it is this ‘electrical noise’ that can
have an adverse effect on sensor signals and affect the
control readings.
Keeping Signal / Quiet and Chassis / Noisy
earths separate reduces th e effect of ‘electrical
noise’ being transferred from component to
component.
This symbol is a standard symbol for earths.
On the circuit diagrams some earths are shown as eyelets
with the description of Earth-**** next to it, the earths also
comply with the 4 digit C number. An example of this is
shown below.
=Anode Cathode
Anode Cathode
LED Colour
Arrow Symbol
indicating light
emission

Wiring and Circuit Protection (18.01)
Electric Distribution/Electronic Control (18.00)
May 2007 Workshop Manual 18-1-11
Maintenance
Forward Harness-Renew
Removal
1. Disconnect vehicle battery.
2. Remove LH headlamp (see Workshop Manual procedure 17.01.AB Headlamp Assembly - LH -
Renew).
3. Remove RH headlamp (see Workshop Manual procedure 17.01.BB Headlamp Assembly - RH -
Renew).
4. Release grommet from body, feed harness from inside of vehicle.
5. Disconnect multiplugs (x2) LH and RH side repeaters.
6. Disconnect multiplugs (x2) LH and RH pad wear indicators.
7. Disconnect multiplug (x2) LH and RH wheel speed sensors.
8. Disconnect multiplugs (x2) LH and RH air flow meters.
9. Disconnect multiplugs (x2) LH and RH headlamp bulb
monitoring resistors.
10. Remove nuts (x6) securing LH and RH earth leads to body (x6).
11. Remove screws (x4) LH and RH harness plate to body and release harness from plate.
12. Remove screen washer reservoir (see Workshop Manual procedure 01.16.DA Reserv oir and Motor Assembly -
Windshield Wash - Renew).
13. Remove fusebox (see Workshop Manual procedure 18.01.KD Fuse Box - Engine Bay - Renew).
14. Disconnect multiplug (x1) purge valve.
15. Disconnect multiplug (x1) ABS modulator.
16. Disconnect multiplug (x1) load level sensor.
17. Disconnect multiplugs (x4) forward harness to cabin harness.
18. Remove wiper motor and linkage (see Workshop Manual procedure 01.16.BA Linkage Assembly - Wiper
- Renew).
19. Remove cross member fr ont latch mounting (see
Workshop Manual procedure 01.14.BD Latch Assembly
- Hood - Renew).
20. Remove nuts (x2) securing earth leads to body (x2).
21. Disconnect multiplug (x1) heated front windshield.
22. Disconnect multiplug PAS sensor.
23. Disconnect multiplugs (x2) A/C compressor. 24. Disconnect multiplug (x1) horn.
25. Release forward harness to engine harness multiplug
(x1) from inner wing and di sconnect multiplugs (x2).
26. Disconnect multiplug (x2) cooling fans.
27. Disconnect multiplug (x1) ambient air temperature sensor.
28. Disconnect multiplugs (X2) crash sensors.
29. Release harness clips (70) and remove harness.
Installation
1. Layout harness around engine bay, feed harness into cabin area and secure grommet.
2. Secure forward harness clips (x70) to body.
3. Connect multiplug (x2) LH and RH side repeaters.
4. Connect multiplug (x2) LH and RH pad wear indicators.
5. Connect multiplugs (X2) LH and RH wheel speed sensors.
6. Connect multiplugs (x2) LH and RH air flow meters.
7. Connect multiplugs (x2) LH and RH headlamp bulb
monitoring resistors.
8. Position earth leads (x6), install and torque tighten nuts (x6).
9. Secure harness to plates (x2) and install plates to body.
10. Connect multiplug (x1) purge valve.
11. Install washer reservoi r (see Workshop Manual
procedure 01.16.DA Reservoir and Motor Assembly -
Windshield Wash - Renew).
12. Install fuse box (see Workshop Manual procedure 18.01.KD Fuse Box - Engine Bay - Renew).
13. Connect multiplug (x1) ABS connector.
14. Connect multiplug (x1) load level sensor.
15. Disconnect multiplug (x4) forward harness to cabin harness.
16. Connect multiplug (x1) heated front screen.
17. Connect multiplug (x1) PAS sensor.
18. Connect multiplugs (x2) A/C.
19. Connect multiplug (x1) horn
20. Position earth leads (x2), install and torque tighten nuts (x2).
21. Secure forward harness multiplug (x1) to inner wing and connect multiplugs (x2).
22. Connect multiplug (x2) cooling fans.
23. Connect multiplug (x1) am bient air temperature sensor.
24. Connect multiplugs (X2) crash sensors.
25. Install cross member front latch mounting 01.14.BD Latch Assembly - Hood - Renew).
26. Install wiper motor and linkage (see Workshop Manual procedure 01.16.BA Linkage Assembly - Wiper -
Renew).
27. Install LH headlamp (see Workshop Manual procedure
17.01.AB Headlamp Assembly - LH - Renew).
28. Install RH headlamp (see Workshop Manual procedure 17.01.BB Headlamp Assembly - RH - Renew).
29. Connect vehicle battery.
Repair Operation Time (ROT)
Warning
To prevent damage to elec trical components, always
disconnect the vehicle battery when working on the
vehicle's electrical system. The earth lead (- ve) must be disconnected first and reconnected last.