1997 ASTON MARTIN DB7 display

The Aston Martin Lagonda Diagnostic System
Installation Instructions -=2?
Step 11
Adjust the contrast control. Is the PDU touch screen illuminated?
YES - Co to step 12
NO - Renew the PDU (0017)
Step 12
Observe the display screen. Is the screen displaying a PDU hard error symbol similar to that shown in Fig 17
YES - Note the number and refer to 'Parts Ordering'.
NO - Co to step 13
Figure 17. PDU hard error code
Step 13
Observe the screen display. Is the screen displaying the main menu (Fig 9)?
YES-Co to step 14
NO - Go to step 15
Step 14
Select the PDU system self test option and press the 'tick'
icon.
Does the screen respond?
YES - Co to step 15
NO - Renew the PDU (001 7)
Step 15
Observe the display screen. Is the screen displaying the symbol shown in Fig 18?
YES - Connection problem, go to step 17
NO - Co to step 16
Figure 18. Communications blocked
9-18 May 1996

^^
The Aston Martin Lagonda Diagnostic System
Installation Instructions
Step 16
Observe the display screen. Is the screen displaying
either of the symbols shown in Fig 19?
YES - Remove the CD caddy and check the CD-ROM.
Re-install the CD-ROM. Go to step 13.
NO - Co to step 19
Figure 19. Reload the CD and retry
Step 17
Connect the PDU to the base station top left connector using the second PDU to base station cable (0064) (Fig 34).
Is the screen displaying the symbol shown in Fig 15?
YES - Go to step 18
NO - The first PDU to base station cable is faulty, renew the cable (0064)
Step 18
Connect the PDU to the VIA using cable (0030) and connect the VIA to the VBA using cable (0028). Connect the
VBA to a charged battery. Does the VIA panel indicator flash for more than 5 seconds after pressing the 'tick'
icon.

YES - Renew the electronic module (0019)
NO - Renew the PDU (001 7)
Step 19
Observe the screen display. Is the screen displaying the
symbol shown in Fig 20?
YES - During the data transfer, the connection was lost.
Check to see if the cable connections are intact, if not,
reconnect and go back to step 13.
NO - Go to step 20
Figure 20. Data transfer connection lost
Step 20
Observe the screen display, is the language selection
screen displayed (Fig 21)?
YES - Try to select a language, go to step 21
NO-Call your local GenRad Service Centre for advice.
(^G?) English
Figure 2
7.
Language selection screen
May 1996 9-19

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
Users Guide D-^?
Vehicle Features
The vehicle features screen illustrated below is used to
identify the vehicle particulars and the model year.
If Airbag - NO is selected, the vehicle is assumed to be 95
model year.
If Airbag - YES is selected, 97 model year is assumed. On
completing entries in the vehicle features screen, the
appropriate vehicle area screen will be displayed.
Vehicle Features
Transmission MANUAL IIBIE^^I
Airbag IDS^I NO
D
Vehicle Area
This screen allows selection of the vehicle system to be

accessed.
Only 4 systems may be accessed on 95 model
year vehicles, on 97 model year cars, 8 systems may be
accessed as follows:
Vehicle Areas
• Engine Diagnostic
• Engine Datalogger
• Transmission
• OBDII Scan Tool
• Climate Control
• Anti-Lock Braking System
• Airbag
. lb Axol
o
PI
mLM
n
WLM
El
Ku^

95 model year software
Zytek Engine Management
GM 4L80-E Transmission Controller
Teves Mk II Anti-Lock Braking System
Valeo Air Conditioning
97 model year software
EEC-V Engine Management
CM 4L80-E Transmission Controller with OBDII
Teves Mk IV Anti-Lock Braking System
Valeo Air Conditioning
PATS Engine Immobiliser
Megamoss security system
FMC Airbag system
Autoliv seatbelt pretensioner
9-30 September 1996

The Aston Martin Lagonda Diagnostic System
Users Guide "^7
Establishing Communications
when cable connections are completed, switch on the
vehicle ignition. The electronic control units will 'wake

up'
and communication between the selected control unit
and the PDU will be established.
As communication
is
established with the selected system,
a system menu similar to that below will be displayed.
System Menu Selections
The options for each vehicle system are described in detai
I

on the following pages but menu entries fall into the
following general areas:
Security
• Datalogger
• Diagnostic Trouble Code and
Alarm History Monitor
• RF Transponder Key Learning
• Exit a
o
Datalogger
The Datalogger function is described in detail using a
worked example at the end of this PDU Users Guide.
Diagnostic Trouble Codes
This application enables the PDU to monitor selected
control module trouble codes and provides the following
functions:
• Decode and display any trouble codes logged by
the control module being monitored.
• When supported by the module, decodeand display
enhanced trouble
codes,
together with any count of
the number of occurrences
• Clear all of the trouble codes and freeze frame data
logged in the control module.
• Monitor other data such as the alarm history in this
example.
Note: The 95model year Zytek engine management
system permits clearing of individual trouble codes
selected by the technician on the PDU.
System Specific Tests
These menu entries cover special tests required to program
ortest system specificfeatures. The following are examples
of tests provided:
Engine KOEO and KOER tests
OBDII Readiness test
Output State Control test
Throttle Potentiometer track test
Ignition Key Learn Menu
Remote Transmitter Key Learn Tests
Special Functions Programming
PATS
Security
Exit
Selecting and then confirming the exit option will return
the PDU to the Main Menu.
PDU Use
In the following
pages,
the use of the PDU on each vehicle
system is described.
Engine Diagnostics
Transmission Diagnostics
Climate Control Diagnostics
Anti-Lock Brakes Diagnostics
Passive Anti-Theft (PATS) Diagnostics
Security System Diagnostics
Airbag Diagnostics
Seat Belt Pretensioner Diagnostics
After these system specific descriptions, the following
general purpose functions are described:
Datalogger
Digital Multi-Meter
Diagnostic Trouble Codes
Printing
Training
OBD II Scan Tool
User Self-Test
9-32 September 1996

^27
The Aston Martin Lagonda Diagnostic System
Users Guide
Engine Diagnostics - 97 MY
Selecting Engine Diagnostics from the Vehicle Area screen
brings up the following Engine Diagnostics Screen.
Engine Diagnostic
• Diagnostic Trouble Codes
• KOEO on Demand Self Test
• KOER on Demand Self Test
• OBDII Readiness Tests
• Output State Control
• Throttle Checks
• Exit
o
Diagnostic Trouble Codes (DTCs)
On selecting DiagnosticTrouble
Codes,
the PCM memory
will be scanned and any recorded DTCs will be decoded
and displayed.
The engine and transmission DTCs are integral to the On
Board Diagnostics (OBDII) system and are ful ly described
in the DB7 OBD II Diagnostics Manual.
Before attempting to clear the logged DTCs, record all
logged DTCs for use in subsequent fault analysis.
All logged DTCs may be cleared by selecting the EEC-V
EMS DTCs
title.
This will bring up the Clear
(C)
icon which
may be selected and confirmed to clear all logged DTCs.
Note that on clearing all logged DTCs you will also clear
the associated timers, counters and fault history files (and
extinguish the engine management warning lightfor North
American vehicles). The OBD II readines test status will
also clear down and a PI 000 (OBD II readiness test
incomplete) trouble code will be set.. A full drive cycle
(see DB7 OBD II Diagnostics Manual) must be completed
to clear the PI 000 code if required. The PI 000 code will
clear automatically after some miles of driving when all
required tests have satisfactorily completed.
Caution: If a transmission code is logged in the PCM, the
TCM DTCs must be cleared first and then clear the PCM
DTCs. If the PCM DTCs are cleared without clearing the
TCM, the TCM code will immediately reset in the PCM
when power is restored.
Key On Engine Off (KOEO) and Key On Engine
Running (KOER) On Demand Self Tests
Before either the KOEO or KOER test will run, the engine
coolant temperature must be in excess of
BO'C.
Select and
confirm either the KOEO or KOER test. If the coolant
temperature is too low, the Pre Test Engine Warm Up
screen will appear. Start the engine and run until coolant
temperature is at 80+°C.
Pre Test Engine Warm Up
Value : 41°C
80 Engine Coolant Temperature {°C)
Waiting for engine to reach
normal operating temperature
o
KOEO Test
As coolant temperature rises through the BO'C level, the
technician will be requested to turn the ignition off and
then on again. The KOEO test will then commence. Static
inputs to the PCM will be checked and any faults detected
will be recorded and displayed as DTCs. If any DTCs other
than PI 000 are logged, go to the OBD II Diagnostics
Manual and resolve the concern(s) using the OBD 11
diagnostic procedures.
KOER Test
If coolant temperature level is below 80°C, the technician
will be prompted to start and run the engine until coolant
temperature rises above 80°C. As the temperature passes
the 80°C
level,
the KOERtest will commence automatically.
If coolant temperature is above the 80°C level, the
technician wi
11
be requested to start the engine. The KOER
test will commence as the engine is started. Dynamic
inputs to the PCM will be checked and any faults detected
will be recorded and displayed as DTCs. If any DTCs other
than PI 000 are logged, go to the OBD 11 Diagnostics
Manual and resolve the problem(s) using the OBD II
diagnostic procedures.
September 1996 9-33

The Aston Martin Lagonda Diagnostic System
Users Guide ^?
Engine Setup
- 95 MY

Two adjustments
may
beset with the aid of the PDU
on 95

MY vehicles.
• Throttle Potentiometer
• Idle Fuelling Trim
From
the 95 MY
Main Menu, make
and
confirm
the

following sequence
of
selections:
Diagnostics
/

Manual
or
Auto Transmission
/

Engine
/

Engine Setup
/

The following connection diagram will then be displayed.
Throttle Sensor Adjustment
- 95 MY

Note:
The
throttle stop
and
throttle cable adjustments
must
be
correct before setting
the
throttle potentiometer.
On completion
of the
engine setup connections
the
test
selection screen will
be
displayed.

1.
Select Throttle Potentiometer.

2.
Turn
the
ignition switch
to
position
II but do not

start
the
engine.
3. Monitorthethrottle potentiometer bargraph voltage
at fully closed
and
then
at
fully open throttle.

4.
The
throttle potentiometer voltage specifications

are:

Throttle Closed
0.57 -
0.59V

Throttle Full Open
4.00 +V

Cable Setup
Diagnostic Socket D
Engine Setup Connections
Tinrottle Position Sensor
Value
:
0.43V

570
600

Idle Voltage
(mV)
Make adjustments as
necessary

Throttle Potentiometer Voltage
5.
If
both voltages
are
either high
or low,
loosen
the

two throttle pot screws and adjust the potentiometer
until
the
specified voltages
are
achieved. Carefully
tighten both screws ensuringthat the potentiometer
does
not
move during tightening.
6.
If
either voltage
is
unstable
or if the
specified
voltages cannot
be
achieved, investigate the cause.
If
the
potentiometer
is
replaced,
set the new pot

using steps
3-5
above.
Note:
On
automatic vehicles,
the
kickdown switch
adjustment check follows the throttle
pot
adjustment.
9-38 September
1996

ffi:
The Aston Martin Lagonda Diagnostic System
Users Guide
Idle Fuelling Trim - 95 MY
This program is used to check and if necessary reset the
fuelling level at idle to ensure that the specified idle speed
and emission levels are attainable. The throttle
potentiometer adjustment sequence must be completed
before the fuel trim sequence can be run.
Note: The throttle setup must be completed before
attempting to set the Idle Fuelling Trim. An error in
throttle
stop,
throttle cable or throttle pot
adjustments can
cause serious
difficulties in setting the Idle Fuelling.
Select Idle Fuelling Trim from the Engine Setup

Menu.
(The PDU connections are
as
fortheThrottle
Potentiometer Adjustment.)

1.

3.
StarttheDB7engineand allow itto warm to normal
operating temperature.
Followthescreeninstructionstorunthe idle fuelling
trim procedure.
Observe the bargraphs for oxygen sensors A and B.
The bargraph indications should oscillate evenly
about the 0% position on the bargraph.
BANK

-100%

BANK

-100%

Idle
Fuel
Trim
Closed Loop Control Data
Q Idle
trim:
8%
9^B 1 1
Oxygen Sensor Fuel Trim 100%
B Idle
trim:
5% —1 1 1

«^
1 1 Oxygen Sensor Fuel
Trim
100%
Idle Fuelling Trim Display
5. Ifthebargraphindicationsarenotoscillatingevenly
about the 0% position, select the A (cylinders 1, 2
and 3) or the B (cylinders 4, 5 and 5) sensor. The
Increase/Decrease buttons will appear.
6. Adjust the fuel trim as required to achieve even
oscillation about the 0% mark for both sensors.
When the adjustment is correct, select the 4 icon
and confirm that the idle fuelling trim is correct. On
confirmation of the adjustment, the PDU will exit
from the idle fuelling program.
7. On completion of the procedure, select Exit from
the Engine Diagnostics Software.
September 1996 9-39