1997 ASTON MARTIN DB7 ECU

'nzm^=2?
Air Conditioning Repair Procedures
Blower Motor Renewal
8.2.07.1 Ambient Temperature Sensor
Renew

?\gure
1.
The ambient temperature sensor is located in the
left hand side of the air plenum chamber under the
lower windshield panel (Fig. 1-1).
Procedure

1.
Disconnect the battery earth
lead.

2.
(On left hand cars) Remove the steering wheel
(mark the position on the column shaft for re­
assembly), instrument pack and surround
trim.

2.
(On right hand cars) Removethegloveboxlidand
liner.
3. Disconnect the hose from the distribution box to
the side vent outlet. Reposition the hose for access.

4.
Disconnect the sensor block connector.
The sensor has locating clips and is a push fit into
the plenum chamber.
5. Lever the sensor free.
8.2.08.1 Blower Motor Driver Side
Renewal
8.2.09.1 Blower Motor Passenger Side
Renewal

1.
Move seat
fu 1
ly rearward.

2.
Disconnect vehicle battery ground
lead.

3. Remove the under scuttle/knee pad bolster.

4.
Remove the lower brace bar/facia assembly
underscuttle knee pad.
Driver Side Only
5. Removetheinstrumentpack, bonnetreieasehandle
mounting bracket and steering column..
6. Disconnect the air hose from the facia side air
outlet.
Passenger Side Only
7. Remove the glove box lid and liner.
Both
8. Remove the nuts securing the component panel

(Fig.
1-1).
Figure 1.
9. Ease the component panel clear for access to the
blower assembly mounting bolts.

10.
Disconnect the pliable trunking from the stub pipes
on either side of the air conditioning unit
(Fig.
1
-3).

11.
Disconnect the blower motor electrical harness at
the block connector.
May 1996 8-59

Air Conditioning Repair Procedures
Blower Assembly Renewal o^s^-^?

12.
Disconnect the vacuum pipe from the flap actuator

(Fig.
1-4).

13.
Open the re-circulation flap in the base of the
blower assembly and fit a wedge to retain it in the
open position (Fig. 1-5).

14.
Remove the bolts securing the blower assembly
and ease the blower unit from its location (Fig.
1
-6).

15.
Remove the tape securing the ducting to the
assembly and remove the ducting (Fig.
1
-7).
Note: To remove the blower motor
assembly
from the
vehicle,
the
lower flap must be opened to allow the upper
flap to
disengage
from the upper body
aperture.

8.2.10.1 Blower Assembly Driver/
Passenger Side Overhaul

Note:
Blower
assemblies
under warranty must not be
dismantled.

1.
Remove the three selftapping screws
(Fig.
1-1) from
the air intake casing.
Figure 7.

2.
Part the air intake casing (Fig.
1
-2) from the motor
assembly (Fig. 1-2) and disconnect the electrical
connections at the lucar connectors (Fig.
1
-4).
Note: Mark the position of the
various components
with
paint or
a
scriber.
This
facilitates
re-assembly.

3. One lucar connector has a raised projection which
matches the aperture in the motor casing to ensure
that the connections are replaced correctly and that
the rotation of the motor is unaffected.

4.
Remove the bolts securing the motor mounting
bracket to the fan housing (Fig. 1-5).
5. Remove the motor and fan assembly from the fan

housing.

6. Remove the mounting bracket from the motor.
7. Using appropriate Allen key, remove the impellor
fan from the spindle.
Re-assembling

1.
Refit the fan to the motor and secure it to the
spindle.

2.
Refit the mounting bracket tot he motor.
3. Locate the fan and mounting assembly into the fan

housing.

8-60 May 1996

o --^ ^^?
Air Conditioning Repair Procedures
Blower Motor High Speed Relay Renewal
6.
7.
8.
Place the flap box assembly to the fan housing and
reconnect the electrical connections.
Fit and tighten the screws securing the flap box to
the housing.
Raise the re-circulation flap, fit and tighten the
remaining screw.
Refit the blower motor assembly.
Reconnect the battery earth-ground
lead.

8.2.11.1
Blower Motor
High Speed
Relay
Renewal

1.
Remove the blower motor assembly complete.
Figure 7.

2.
Open the flap for access.
3. Using a suitable tool remove the relay from the
blower assembly (Fig.
1
-1).

4.
Fit a
new relay
and
refit the blower motor assembly.
May 1996 8-61

Air Conditioning Repair Procedures
Water Temperature Switch/Heater Matrix Renew •=2?
8.2.12.1 Water Temperature Switch
Renewal

1.
Disconnect the battery earth
lead.

2.
Un-clip and remove the left hand underscuttle

casing.

Figure.
3. Note and disconnect the feed wires from the switch

(Fig.
1-1).

4.
Displace and remove the switch from the water

pipe.

5. Fitting a new switch is the reversal of the removal
procedure.
8.2.13.1 Heater Matrix Renewal

1.
Disconnect the battery earth
lead.

2.
Remove the left hand underscuttle panel.
3. (On right hand cars) Remove the glove box
assembly.
3. (On left hand cars) Remove the instrument pack
and surround
trim,
steering column and mounting
bracket.

4.
Drain the coolant into a suitable container.
5. Remove the matrix cover panel securing screws.
6. Removethe rear
panel,
displacethefront panel and
foam seal for access.
7. Place rag in position.
8. Remove screws securing the feed pipe and
disconnect the pipe from the matrix.
9. Remove and discard the gasket.

10.
Remove the screws securing the feed pipe and
disconnect the pipe from the matrix.

11.
Remove and discard the gasket.

12.
Disconnectthewatertemperatureswitchfeedwires.

13.
Remove the foam pad from the pipes.

14.
Remove the front panel from the unit.

15.
Undo the heater hose matrix pipe hose clips and
disconnect the hoses from the pipes.

16.
Reposition the pipes from the matrix.

1
7. Remove the matrix from the air conditioning unit.

18.
Fitting a new matrix is the reversal of the removal
procedure.

19.
Ensure that new gaskets are fitted.
8-62 May 1996

^>
Air Conditioning Repair Procedures
Electronic Control Module/Vacuum Solenoid Renewal
8.2.14.1 Electronic Control Module
Renew
8.3.01.1 Vacuum System Solenoid
Renewal

1.
Disconnect the battery earth
lead.

2.
Remove the right hand underscuttle casing.
3. (On left hand cars) Removethe glove box assembly.
3. (On right hand cars) Remove the instrument pack
and surround
trim.

4.
Disconnect the earth wire and three block
connectors from the control module (Fig.
1
-2).
5. Remove the securing screws and module from the
air conditioning unit (Fig. 1-1).
Fitting a new module
is
the reversal of the removal
procedure.
The flaps in the cabin air distribution vents and the
water valve in the pipe line from the engine coolant
system to the heater matrix are all operated by
vacuumactuators.The vacuumfor these issupplied
by four solenoids mounted in a manifold pack
located behind the front left hand footwell outlet.
Failureof a solenoid will require replacement of the
manifold pack.
Procedure

1.
Disconnect the battery earth
lead.

2.
Remove the following:
• glove box and lid
• facia trim (walnut strip)
• radio and ashtray
• centre console switch assembly
• left hand underscuttle casing/knee bolster
Detai
Is
ofthe above operations can be found in the
trim and the electrical sections.

2.
Remove thefixings joining the centre console to the

facia.
This allows the front of the console to be
repositioned for access.
3. Disconnect the ducting from the left hand footwell
outlet.

4.
Remove the two plastic fixings that secure the
slotted footwel
I
outlet and
si
ide the outlet out ofthe
unit.
7. Cut the tie strap holding the vacuum lines and
electrical harness to the underside of the air
conditioning unit.
8. Remove the screws that secure the manifold pack
to the underside of the air conditioning unit and
slide out the plate complete with the manifold
pack.

10.
To fit a new manifold pack reverse the steps for the

removal.

May 1996 8-63

'=^
The Aston Martin Lagonda Diagnostic System
Installation Instructions
12 10
19 22 21 20
VIA A / /^^>^ I B T
A-XA^I'A® QA
13
16
18 29
Figure 7. The Aston Martin Diagnostic System
Key to Figure 1

1.

2.

3.

4.

5.
6.
7.

7.1.

7.2.
7.3.
7.4.
7.5.
7.6.
7.7.
8.
9.

10.

11.

LCD touch screen
Power on switch
Power off switch
Screen contrast control
Battery charge indicator (Orange/Yellow)
Power on indicator (Green)
PDU interface connectors
Black probe
Red probe
Current clamp
Pressure transducer
Vehicle battery adaptor (VBA)
VIA, base station, serial interface and system test
Temperature probe
Battery cover
Connector A for vehicle cable
VIA power input cable
Connector B for vehicle cable

12.

13.

14.

15.

16.

17.

18.
19.

20.

21.

22.

23.

24.

25.

26.

27.

28.
29.

Connector for PDU cable
VIA status indicator
Vehicle Interface Adaptor (VIA)
Portable Diagnostic Unit (PDU)
Base Station
Base station door
Base station door lock
Charging and loading data connector
Secondary charging connector
Power on indicator (Green)
Status Indicator (Red)
CD-ROM drive
Electronic module securing screws
CD-ROM eject button
CD-ROM drive active light
Audio output (not used)
Audio level (not used)
Base station drawer.
May 1996 9-3

The Aston Martin Lagonda Diagnostic System
Installation Instructions ^7
Base Station installation
It is recommended that the base station is wall
mounted (Fig 3). Alternatively it may be mounted
on a bench. The base station houses the CD-ROM
drive and power supplies.
Note: The electronic module should only be fitted
after

the base station has been installed.
Wall Mounting
It
is
importantthatthefollowing points be considered
before carrying out the mounting procedure.
The location should be close to the vehicle repair

bays.
The base station will require a power outlet
close by, such that the 2m mains lead will
comfortably reach the outlet.
Thewall plate should be attached with fourfasteners,
each of which has a minimum pull-out strength of
300 kg (662 lb). Thefourfasteners are not supplied,
as the type of fastening will depend on the wall

material.
The mounting holes in the wall plate are
8mm diameter with a maximum clearance for a
socket spanner of 30mm. It is recommended that
6mm diameter bolts are used to secure the wall

plate.

WARNING: The mains power outlet must be dose
to the equipment and be clearly recognisable as
the power source for safety reasons.
French Market
Only:
Do not connect the PDU
equipment
to
IT(lmpedante Terre) power systems.

r

900mm
Figure 3. Wall Mounted installation
WARNING: This equipment must be earthed via
the
mains
lead through the outlet socket. In markets
where three pin main power outlets are not
available, a separate earth point must be used
Procedure

1.
Select a suitable location.

2.
Mark a horizontal line on the wall 900mm above
the floor (Fig 3)
3. Removethetwoscrewssecuringthewall mounting
plate to the base station and remove the wall
mounting plate.

4.
Holdthewall mounting plate up to the marked line
and mark four hole positions for the wall mounting
plate bolts.
5. Drill the wall to the correct diameter and depth
required for the four bolts.
6. Securely fasten the wall mounting plate to the
wall.

Lift the base station onto the wall mounting plate,
fit and tighten the two screws/washers to secure the
base station to the mounting plate.
CAUTION: The gap beneath the base station
should be maintained free from obstructions to
allow a flow of air under the unit for cooling.
9-8 May 1996

^^?
The Aston Martin Lagonda Diagnostic System
I nstal lation I nstructions
Bench Mounting
The base station may also be mounted on a bench, which
must be in a safe position, stable and protected form
hazards and impacts. The base station must be mounted
at the back of the bench. 'Z' clips are provided for
permanent mounting. The bench surface must be kept free
from dust at all times.

CAUTION:
A gap under the base station must be
maintained free from obstructions to allow a flow of air
under the unit for cooling.
Electronic Module installation
WARNING: The base station electronic module must be
disconnected from the mains supply prior to installation/
removal from the base station assembly. DO NOT
reconnect to the mains supply until the module is safely
fitted into the base station. This unit must be earthed.

Note:
Users in North America are advised to replace the
ceramic mains fuse in the electronic module with theglass
fuse supplied.
Procedure

1.
Unlock the base station door

2.
Pull the right spring-loaded hinge (Fig 4-1) and
remove the door.
3. Removetheelectronicsmodulefrom the packaging
and place it on a firm surface.

4.
Remove the two screws and washers from the front
of the module (Fig 4-3).
5. Insert the mains power lead into the socket at the
rear of the module Fig 4-4), DO NOT CONNECT
TO THE MAINS SUPPLY.
6. Insert the two guide pins on the sides of the module
(Fig 4-5) into the base station slots.
7. Slide the module into the base station until fully

home,
raise the front so that it is level and draw it
slightly forward.
8. The two connectors on the front of the module will
appear through the matching holes in the base

station.
Support the module whilst refitting the two
retaining screws and washers (Fig 4-6).
9. Secure the mains lead to the underside of the base
station using the two cable ties provided (Fig 4-7).

10.
If bench mounting, the base station will need to be
turned on its back to install and secure the mains

lead.

11.
Refit the base station door.
CAUTION: Take care to avoid the sharp edges of the
module whilst installing. Take care to support the
module from the underside until the mounting
screws are secured.
Figure 4. Electronic Module Installation
May 1996 9-9