1997 ASTON MARTIN DB7 lock

Air Conditioning Repair Procedures

Field Coil Renewal
/
Gasket Kit Renewal ffi^e^'^^
8.1.02.1 Field Coil Renewal 8.1.03.1 Renew Gasket
Kit

Procedure

1.
Open
the
bonnet
and fit a
wing cover.

2.
Depressurise
the air
conditioning system.
3. Remove
the
compressor.

4.
Remove
the
compressor drive clutch.
5. Remove
the
compressor pulley.
6. Slacken
the
field coil wire clamp screw
(Fig.
1) and

release
the
wire from
the
clamp.

10.

Remove
the
field coil retaining snap ring
and

detach
the
field
coil.

Clean
the
mating face
of the
compressor with
a

cloth moistened with
an
approved cleaning
fluid.

Position
the new
field coil
on the
compressor
and

fit
the
retaining snap
ring.

Route
the
wire
to the
compressor
and fit the
wire
clamp, tighten
the
securing screw.

11.
Fit the
compressor pulley.

12.
Fit the
compressor drive clutch.

13.
Fit the
compressor.

14.
Recharge
the air
conditioning system.

15.
Remove
the
wing cover
and
close
the
bonnet.
Data
Torque Figures
Cylinder head bolts 29.83
to 33.9 Nm.

Procedure

1.
Open
the
bonnet
and fit a
wing cover.

2.
Depressurise
the air
conditioning system.
3. Remove
the
compressor.

4.
Position
the
compressor
in a
vice, tighten
the
vice
onto
the
compressor body lugs.
5. Remove the outlet port blanking plate securing bolt
and detach
the
plate.
6. Remove
and
discard
the 'O'
ring seals from
the

outlet port.
7. Remove
the
compressor cylinder head securing

bolts,
detach
the
cylinder head.
8. Detach
the
valve plate from
the
compressor.
9. Remove
the
gaskets from
the
compressor.

10.
Remove
all
traces
of
gasket material from
the

mating surfaces
of the
cylinder head, valve plate
and cylinder block.
Figure
1.

11.
Position
new
gaskets (Fig.
1 -1
and 3) on the
valve
plate
(Fig. 1-2) and
then place
it on the
cylinder
block.
8-52 May
1996

ES3^^
Air Conditioning Repair Procedures
Valve Plate Renewal

Figure
2.

12.
Position the cylinder head (Fig. 2-1) on the cylinder
block (Fig. 2-2), fit and tighten the securing bolts in
the sequence shown in Fig. 3.
8.1.04.1 Valve Plate Renewal
Data
Torque Figures
Cylinder head bolts 29.83 - 33.9 Nm
Procedure

1.
Open the bonnet and fit a wing cover.

2.
Depressurise the air conditioning system.
3. Remove the compressor.

4.
Position the compressor in a vice, tighten the vice
onto the compressor body lugs.
5. Remove the outlet port blanking plate securing bolt
and detach the plate.
6. Remove the 'O' ring seals from the compressor
outlet port.
figure 3.

13.
Fit new 'O' ring seals in the compressor outlet port,
position the outlet port blanking plate and fit and
tighten the securing bolt.

14.
Check and top up compressor oil

15.
Refit the compressor.

16.
Recharge the air conditioning system.
Figure 1.
7. Removethecylinder head securing boltsand detach
the cylinder head (Fig. 1-1) from the cylinder block.
8. Remove valve plate
(Fig.
1
-2) from the compressor.
9. Remove all traces of gasket material from the
mati
ng
surfaces of the cy
I
i nder
head
and compressor.

10.
Apply clean refrigerant oil to the gaskets and then
position them on the valve plate.
May 1996 8-53

^?
Air Conditioning Repair Procedures
upper/Lower Servo Feedback Potentiometer Renew

8.2.03.1
Upper Servo Feedback
Potentiometer Renewal

8.2.04.1
Lower Servo Feedback
Potentiometer Renew

1.
Disconnect the battery earth
lead.

2.
(On left hand cars) Remove the instrument paci<
and surround
trim.

2.
(On right hand cars) Remove the glove box
assembly.
3.
Remove the
securing screws
and
the potentiometer
assembly. Disconnect the electrical connector.

4.
Fitting a new potentiometer is the reverse of the
removal procedure.

1.
Disconnect the battery earth
lead.

2.
Un-clip and remove the left hand underscuttle

casing.

Figure 1.
3. Disconnect the electrical block connector
(Fig.
1).

4.
Remove the securing screw and the potentiometer
assembly.
5. Fitting a new potentiometer is the reversal of the
removal procedure.
May 1996 8-57

Air Conditioning Repair Procedures
Upper/Lower Flap Motor Renew [EB^^^?
8.2.05.1 Upper Flap Motor Assembly
Renew
8.2.06.1 Lower Flap Motor Assembly
Renew

1.
Disconnect the battery earth
lead.

2.
Remove the electronic control module.
3. Disconnect the motor block connector.

4.
Remove the securing screws and motor assembly

(Figl).

Figure
5.
5. Fitting a new motor is the reverse of the removal
procedure.

1.
Disconnect the battery earth
lead.

2.
Remove the right hand side underscuttle casing.
3. Remove the electronic control unit.

4.
Disconnect the block connector.
5. Remove the screws securing the motor to the air
conditioning unit.
6. Displace the'P'clip.
7. Withdraw and remove the motor from the air
conditioning unit.
8. Fitting a new motor is the reversal of the removal
procedure.
8-58 May 1996

'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
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
Contents
Installation Instructions
Introduaion 9-2
The Aston Martin Diagnostic System 9-2
Diagnostic System Cables 9-5
Base Station Installation 9-8
Problem Solving 9-16
Service Centres 9-21
Service and Maintenance 9-22
Technical Specifications 9-24
Operating Instructions
The Aston Martin Lagonda Diagnostic System 9-27
Software 9-29
Cable Setup 9-31
Diagnostic Sockets - 97 MY 9-31
Establishing Communications 9-32
System Menu Selections 9-32
PDU Use 9-32
Engine Diagnostics - 97 MY 9-33
Transmission Diagnostics 9-40
Climate Control Diagnostics 9-43
Anti-Lock Brakes Diagnostics 9-43
Passive Anti-Theft (PATS) Diagnostics 9-44
Airbag System Diagnostics 9-45
Seat Belt Pretensioner Diagnostics 9-47
Print Facility 9-49
Digital Multimeter 9-50
Diagnostic Trouble Codes 9-53
Datalogger 9-55
Datalogger Example 9-63
Training 9-66
OBD II Scan Tool 9-66
System Self Test 9-69
The Asterisk (*) Menu 9-69
System Setup 9-70
May 1996 9-1

'=^
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