ASTON MARTIN DB7 1997 Workshop Manual

The Aston Martin Lagonda Diagnostic System
Installation Instructions =27
step 21
Observe the screen display. Is the system loading from the CD-ROM?
YES - Go to step 13.
NO - Renew the PDU (001 7).
Parts Ordering
Before calling GenRad, it is essential that the system self test is run from the main menu. If the system self test will
not run or the PDU does not switch on, follow the Problem Solving procedures.
The system self test option will identify any fau It and display a fault code on the PDU screen. This fault code number
must be recorded. When in contact with your local GenRad Service Centre, they will require this number in order
to send the correct substitute parts.
Before calling the GenRad Service Centre, please have the following information available.
Dealer Name and Address
Name of the contact at that address
PDU Serial Number (base station LHS - Fig 22)
Fault Code, Component Name and Serial Number as given on the PDU screen during self test.
Ifthe system self test will not run, GenRad will require the name and part number ofthe component identified during
he Problem Solving Procedures.
Figure 22. Diagnostic System Serial Number
9-20 May 1996

' -^ ^ The Aston Martin Lagonda Diagnostic System
Installation Instructions
Service Centres
UK and EIRE
GenRad Limited, Horsefield Way, Bredbury Industrial Park, Bredbury, Stockport, Cheshire SK6 2SU, England
Telephone: 061-406-8209 Fax: 061-406-8480
Germany
GenRad GmbH, Neumarkter Strasse 83, 81673 Munchen, Germany
Telephone: 01049-89-431990 Fax: 01049-89-43199101
Switzerland and Austria
GenRad AG, Drahzug Strasse 18, Postfach 8032, Zurich, Switzerland
Telephone: 010411-422-2420 Fax: 010411-422-2065
Italy
GenRad SPA, Via Fantoli 21/13, 20138 Milano, Italy
Telephone: 01039-2-502951 Fax: 01039-2-5063331
France, Spain and Portugal
GenRad Europe Paris, Succursale de GenRad Europe Limited, 6 Rue Vincent Van Gogh, 93364, Neuilly Plaisance
Cedex, France.
Telephone: 01033-1-49442200 Fax: 01033-1-49442298

Sweden,
Norway, Denmark and Finland
Lagercrantz Kontest AB, Kung Hans vag 3, Box 986, 191 29 Sollentuna, Sweden
Telephone: 01046-8-626-06-20 Fax: 01046-8-754-88-67
Netherlands, Belgium and Luxembourg
Multidata BV, Postbus 137, Bedrijvencentrum "De Baanderije", ParallelwegZuid 33/1,5280 AC Boztel, Netherlands
Telephone: 01031-4116-83775 Fax: 01031-4116-85359
USA and Canada
GenRad Inc, 300 Baker Avenue, Concord, Massachusetts,
1
742, USA.
Telephone: 0101-508-369-4400 Fax: 0101-508-287-2011
Singapore, Taiwan, Hong Kong and Thailand
GenRad Inc, 73 Science Park Drive, Cintech Building #03-04, Singapore, Singapore 0511.
Telephone: 01065-2784400 Fax: 01065-7766422
Australia and New Zealand
Nilsen Instruments, 25-27 Paul Street North, North Ryde, New South Wales 2113, Australia.
Telephone: 01061-2-7362888 Fax: 01061-2-7363005
Japan
Tokyo Electron Limited, 2-30-7 Sumiyoshi-Cho, Fuchu City, Tokyo, Japan 183
Telephone: 01081-423-33-8377 Fax: 01081-423-33-8489
May 1996 9-21

The Aston Martin Lagonda Diagnostic System
Installation Instructions ^=2?
Warranty
The Aston Martin Diagnostic System is covered by a one year warranty. Should any of the electrical components
fail during the warranty period, contact your local GenRad Service Centre for a replacement part. Note that the
warranty does not include physical damage.
Spare Parts
Refer to the Aston Martin Diagnostic System Users Guide for a full parts list. All spare parts should be obtained from
your local GenRad Service Centre who can advise you on current prices.
Servicing and Maintenance
CA UTION: With the exception of those parts listed in this section, there are no user serviceable parts within the
system. All servicing must be carried out by GenRad Service Centres.
Battery Testing.
The NICAD batteries fitted in the PDU are designed to be rechargeable and should normally last through many
recharge cycles. Battery life of three to five years can be expected. The capacity of new batteries improves after
several charging cycles. After extended use, they may require renewing. The following procedure will assist you to
determine when renewal is required. Do not use this procedure with new batteries or with a new PDU.
Testing Procedure

1.
Remove all cables from the PDU.

2.
Switch the PDU on and leave it until it switches off (the power on indicator will extinguish)
3. Connect the PDU to the base station for at least 12 hours charging.

4.
Remove all cables from the PDU, switch on the PDU and start timing.
5. If the PDU switches off in less than 30 minutes, the batteries should be renewed.
Changing the Battery Pack
CAUTION: Always read and follow safety warnings and instructions printed on the equipment. The rechargeable
NICAD batteries fitted to the PDU are of a special type. They must only be substituted by GenRad approved parts.
Do not substitute the batteries with any other type. Always dispose of old batteries in compliance with local
recycling regulations.
Battery Changing Procedure
A spare battery pack kit (0975) is available from your local GenRad Service Centre.
Figure 23. Battery cover screw Figure 24. Battery pack
9-22 May 1996

^?
The Aston Martin Lagonda Diagnostic System
Installation Instructions

1.
Switch off the PDU and remove all cables.

2.
Remove the cover screw (Fig 23) and remove the cover.
3. If damaged, remove the old foam gasket from the cover and replace with the new one supplied.

4.
Note the orientation of the connector. Disconnect the connector and remove the old battery pack.
5. Fit and connect the new battery pack (Fig 24) with the black cable towards the touch screen.
6. Refit the cover and cover screw.
7. Refer to the Battery Charging instructions for recharging times.
Changing the Dust Filter
The electronic module has a dust filter fitted to the underside of the module. Every three months a new filter wil
be supplied. To change the filter, proceed as follows:

1.
Switch off the mains supply and pull out the old filter (Fig 25).

2.
Feed in the new filter with the blue side facing in, pushing it well into the corners of the holder.
3. Switch on the mains supply.
Figure 25. Dust filter replacement Figure 26. Support arm adjustment
Support Arm Adjustment
Periodically the support arm mechanism may require adjustment.

1.
Remove the cross head arm fixing screw.

2.
Using a suitable screwdriver, turn the tensioning screw (Fig 26) anti-clockwise half a
turn.

3. Refit the leg fixing screw and repeat the operation on the opposite side.

4.
Check that the arm tension is enough to support the weight of the PDU without movement.
VIA Carrying Case
The VIA unit (0018) is secured into its carrying case with two fixing screws from the underside of the case. If a new
VIA is required, remove the two fixing screws and lift the VIA from the carrying case. Return only the VIA for
replacement, do not return the carrying case.
May 1996 9-23

The Aston Martin Lagonda Diagnostic System
Installation Instructions E:m3^^?
New CD-ROM Releases
The latestversion of the
Aston
Martin Diagnostic
System
software will besuppliedwiththesystem. When necessary,
new releases of software will be issued by mail to each user of
the
system.
Immediately fit the new CD-ROM to the
disc caddy, retaining the old CD in its protective case as a backup. The new software should be loaded at the next
useofthePDU.
In order to identify the revision level of the software, the version number is included on the disc.

e.g.
DB7 PDU 001 is version 001 of the DB7 PDU software.
Technical Specifications
Electronics Module
Voltage Supply
Frequency
Current Consumption
Operating Temperature
Operating Humidity
PDU and VIA
Voltage Supply
PDU Current Consumption 2.5 Amp
VIA Current Consumption 6.5 Amp
Operating Temperature 0 - 50°C
Operating Humidity
Storage Humidity
Storage Temperature
Weights
100-240 VAC
50-60 Hz

1.0-0.5
Amp
0 -45°C
15 - 85% non-condensing
12 VDC
Base Station
Electronic Module
PDU
Carrying Case
VIA

95%
max non-condensing 12 hours

60%
RH max non-condensing 1000 hours
-20''C to 70°C
20.5 kg (45.2 lb)
3.7 kg
(8.1
6 lb)
3.7 kg
(8.1 6
lb)
2.0 kg (4.4 lb)
4.3 kg (9.48 lb)
9-24 May 1996

^^
The Aston Martin Lagonda Diagnostic System
Installation Instructions
Statement of Calibration
Product Range Aston Martin Diagnostic System
Product Type Portable Diagnostic Unit
Product Number 3130-001 7
We certify that the above product has been tested and found to conform to the product specification, priorto dispatch
from GenRad. The measurements performed by this equipment are traceable to international measurement
standards. Calibration records, including the date of calibration and the serial numbers of the measurement
instruments are maintained by GenRad and are traceable through the PDU System serial number.

NOTE:
The PDU will not require any periodic adjustment in order to maintain specified measurement accuracy.
Calibration Measurements
Ambient temperature during calibration 20±1 °C.
The test resistances in the table below are applied between the red and black probes. The PDU is set to measure
resistance between these probes using the DMM function. The PDU reading must be between the limits shown.
Test Resistance
10Q
10MQ
PDU Reading Limits
9.84f2-10.16Q
8.22MQ -11.78MQ
The test voltages in the table below are applied between the red and black probes. The PDU is set to measure voltage
between these probes using the DMM function. The PDU reading must be between the limits shown.
Voltage
50mV
lOOmV
160mV
350mV
720mV
1.45V
2.90V
7.25V
14.5V
29V
49V
98V
175V
PDU Reading Limits
48mV - 52mV
98mV - 102mV
157mV -163mV
345mV-355mV
712mV-728mV
1.43V - 1.47V
2.86V-2.94V
7.1 7V - 7.33V
14.35V- 14.65V
28.7V-29.3V
48.5V-49.5V
97.0V-99.0V
173.7V-176.3V
May 1996 9-25

The Aston Martin Lagonda Diagnostic System
Installation Instructions
o:s^^7

9-26 May 1996

^^?
The Aston Martin Lagonda Diagnostic System
Users Guide
The Aston Martin Lagonda Diagnostic System
The Aston Martin Lagonda Diagnostic System fulfils a number of functions in aiding the technician to quickly and
accurately locate
faults.
The heart ofthe
system is the
Portable Diagnostic Unit
(PDU),
a
lightweight powerful computer/
measurement system providing a step-by-step user friendly interface for the technician.
September 1996 9-27

The Aston Martin Lagonda Diagnostic System
Users Guide o: "3^^?
PDU Functions
The PDU main menu provides access into the following functions:
Diagnostics
Training
Digital Multimeter
User Self Test
Diagnostics
On selecting'Diagnostics'from the main
menu,
the user will be prompted to enter the features and market specification
of the vehicle to be tested. Use of the diagnostics in each of the above areas is described later in this guide.
Diagnostics Menu - 95 Model Year
Engine
Anti-Lock Braking System
Vlenu - 97 Model Year
Engine Diagnostics
OBD II Scan Tool
Airbag
Seat Belt Pretensioner
•
•
•
•
Transmission
Engine Datalogger
Climate Control
PATS System
Climate Control
Transmission
Anti-Lock Braking System
Security
Digital Multimeter
The Digital Multimeter function provides the capabilityto measure voltage, current, resistance, frequency, pulse width,
pulse period, and duty cycle. These measurements are usually made using the PDU measurement probes. Measurements
may also be made using the module pin selection function on the Teves Mk
II
braking system and on the Air Conditioning

system.

Training
An on-screen programme is provided to train new users in the use of screen icons and in the use of the digital multi­
meter and datalogger functions.
User Self Test
In order to prove that the equpment is functioning correctly, a complete user self test is incorporated. The user is directed
to test the PDU and then to progressively connect each part of the PDU system which will be tested by the software.
Any fault identified during the test is notified to the user. If no faults are identified, the user is advised on the correct
functioning of the system.
PDU Power
Power for the PDU is supplied via an internal rechargeable battery pack which can keep the PDU operational for
approximately one hour when disconnected from the base station and the vehicle. In order to preserve PDU battery
charge, power to the screen backlight is automatically cut after five minutes of inactivity. The power ON indicator
remains lit, indicating that the PDU is in 'stand-by' mode. One touch of the screen will restore backlight power.
When connected to the base station, power is supplied to the PDU from the Electronic Module to recharge the PDU
battery pack as necessary.
On 95 MY vehicles, the Vehicle Battery Adaptor (VBA) is used to maintain PDU power.
On 97 MY vehicles, when connected via the MPA to either diagnostic socket on the vehicle, power is supplied via pin
4 (chassis ground) and pin 16 (battery power) to maintain PDU power at all times even when the vehicle ignition is
switched off.
On all model years, when connected to the air conditioning system using the VIA, the vehicle battery adaptor (VBA)
must also be used to maintain PDU power.
9-28 September 1996

^=2?
The Aston Martin Lagonda Diagnostic System
Users Guide
Software
Software for the PDU system is supplied on CD ROM
discs and supports diagnosis on the following control

units:

Zytek Engine Management System (95 MY)
EEC-V Engine Management System (97 MY)
CM 4L80-E Transmission Controller
PATS - Passive Anti Theft System
Teves Mk II ABS System (95 MY)
Teves Mk IV ABS System (97 MY)
Valeo Air Conditioning System
PMC Airbag System
Megamoss Security System
Autoliv Drivers Seat Belt Pretensioner
(where fitted)
All of these systems are supported in English, French,

Italian,
German and Japanese.
In addition to the specific system software listed above,
thePDU isalsoequipped with general purpose software
to provides multimeter, printing and PDU training
options.
Software for 95 and 97 Model Year Vehicles
Software for both the 95 and 97 model year vehicles is

provided.

The PDU system requires a Vehicle Interface Adaptor
(VIA) to communicate with the control units of 95
model year vehicles.
Communication with 97 model year control units is
principally via an Aston Martin multi-protocol adaptor
to 2 inbuilt diagnostic sockets in the vehicle. Only the
air conditioning unit requires the VIA on 97 model year
vehicles.
If the multimeter function is used, the Vehicle Battery
Adaptor (VBA) will be required to provide the basic
supply and ground levels for the multimeter.
Software Loading and Selection
Ensure that the system is powered up and that the PDU is
correctly connected to the base station. Check and if
necessary load the DB7 software CD Revision 002. (see
the installation guide)
Switch 'on' the PDU which will run through two front
screens and then load the following initial PDU software.
Operating System
Main Menu
Selector
Digital Multimeter
Interactive Training
September 1996 9-29