1997 ASTON MARTIN DB7 light

^^?
The Aston Martin Lagonda Diagnostic System
Users Guide
The following trigger options are available:
Triggers when the signal passes above
a
specified

value,
i.e. stop lamp.
Triggers when the signal passes below
a
specified

value,
i.e. Anti-Lock brakes warning lamp.
Triggers when the signa
I
passes outside
a
specified

band,
i.e. oxygen sensor feedback.
Triggers when the signal passes into a specified

band.

Once the type of trigger has been selected the trigger
vaiue(s) (i.e. the signal level at which the trigger point wil
I

occur) should be set.
These values are set by highlighting the existing value.

i
jr:
ECT ^ 1
Trigger KBIT" ^
^^^^1

S.I.

°c
Oj
Engine coolant temperature

m
^
Highlighted Trigger Value
Press the calculator-style
icon.

A new screen should now be displayed.
Trigger Value Entry
Enter the required trigger value using the calculator-style
screen buttons.
The S.I. button enables unit selection, where applicable,
refer to S.I. Units.
Confirm the trigger value by pressing the 'tick'
icon.

The trigger screen will now be re-displayed.
Press the 'tick' icon to go back to the Parameter
Customisation screen.
Press the 'tick' icon again to return to the datalogger main

menu.

September 1996 9-59

The Aston Martin Lagonda Diagnostic System
Users Guide ^2?
Split Cursor Icon
The split cursor icon spl its the vertical cursor into
two parts.
1^

VV

One permanent static cursor represented by
a
solid vertical
line in the waveform display, and one moveable cursor
represented by a dotted vertical line, this is moved by
applying finger pressure to the screen in the position the
cursor is required.
The digital display of the waveforms will now represent
the difference in levels between the two cursors and not
the absolute signal level as detailed earlier.
Re-scale Vertical Icon
Normally all of the waveforms are displayed
with the vertical axis representing the maximum
possible variation ofthesignal,
e.g.
battery voltage
0 to 16 V.
The re-scale icon causes the waveform to scale such that
the recorded variation determines the scale, this normally
enlarges the vertical scale.
The scaling operation can be performed on any of the
displayed waveforms by highlighting the parameter name
prior to the operation.
Once auto-scaling
has
taken place, further manual scaling
may be achieved by using the '+' and '-' system icons.
Waveform Display Number
This icon enables control of the number of
waveforms displayed on the screen at any one
MMV
MMV
time.

Pressing this icon causes the '+' and '-' system icons to
appear. Using these system icons increase or decrease the
number of displayed waveforms.
It should be noted that the more waveforms displayed the
poorer the detail becomes, therefore the number of
displayed waveforms should be kept to a minimum.
Horizontal Scale
-^ This icon performs the same function as the re-
scale vertical icon only for the horizontal axis.
By expanding the scale more detail will be available, thus
proving easier to analyse. However the amount of time
displayed on any one screen will be reduced.
Bargraph / Digital display
Bargraph / Digital display provides another format in
which to display recorded date.
The Datalogger icons operate similar to those used in the
waveform display. However one new icon is provided as
a toggle option from bargraph to digital display.
OV
TP :3.91V
ECT: 57°C 5V
-49°C lAT: 0°C 150°C
-49°C 150°C
II 88 zF 1^
Bargraph / Digital Display
On-Road Trigger
When on-road trigger is selected using the motorway icon
from the main menu a symbol is displayed over the entire
screen display area.
This option is intended for use during on-road tests to
ensure that the PDU screen does not distract the driver.
Press the record icon to start capturing data, a trigger icon
will replace the record
icon.

• iF •
Datalogger Trigger Icon
Press the trigger icon to instigate the manual trigger.
Once the trigger procedure has occurred, a stop icon will
replace the trigger
icon.
Press the stop icon to stop
capturing data.
9-62 September 1996

The Aston Martin Lagonda Diagnostic System
Users Guide
ES^"^?

The screen was scrolled down until 'RRW<133' was

displayed.

The rectangle below the play icon on row 'RRW<133' was

selected.

The rectangle below the eye icon in row 'RRW<133' was

selected.

The 're-order' icon was then selected; this places
the record enabled parameters at the top of the
parameter list in numerical order.
The 'ABSWL' parameter was then selected and the trigger
switched on by touching the rectangle in the ABSWL line
below the trigger symbol.
The 'OV rectangle was then selected.
\
(n>

ABSWL
Trigger
S.I.
Anti-Lock Brakes Warning Lamp

1123;
11=3

Signals
ABSWL
RLW<133
RRW<133
BAT+P20
BAT+P3
FLS2
FRW<133
•
j^ •' S.I.
KPH
KPH
V
V

^K

KPH
i=
ABS Warning Light selection
^
Themagnifying-glasstype icon wasthen selected
to lead to the trigger customization screen.
The 'falling-edge' trigger icon was then selected.
DataLogger will then trigger from the ABSWL when the
signal passes below a specified value.
Selection of the OV trigger point
The calculator-style icon was then selected to
alter the trigger value. 11 2 31
Using the calculator-style screen buttons, a threshold
value of 6 Volts was entered.

1
7 1 1 8 1 1 9 1
Q
Q

5
1 6 1
LB m

1
^I 1 «J •
Trigger Point setting to 6V
ABSWL
Trigger
Anti-Lock Brak
^
(n>

•
1
'

^H

OV
es Warning L
.jr.
1

S.I.

°C
m
amp
J
l===-l
Falling Edge Trigger Icon
9-64 September 1996

ThesAston Martin LagondanDiagriostic System

Users;
Guide-,^
User Self Test
^ -

The self-test function built into
the
PDU software enables
users
to
completely test the system
for
faulty rnodules and,
cables. By following the screen instructions, faulty system
components
can be
identified.
Procedure
Select User Self-Test from
the PDU
main menu.
The
self-
test software will load from
the CD.

The first screen shows
the
cable setup with
the PDU

connected
to the
base station. After confirming that
the

connections
are
correct,
the
self-test sequence begins.
The initial test
is of
the
PDU and
base station electronics
and takes slightly less than
2
minutes.
The user
is
then directed
to
connect
the
various external
elements of the system
in
turn and confirm the cable setup
at each stage.
As
each element
is
connected
and
tested,
the sequence will either direct that
the
next element
is

connected
or
will report
a
fault
in the
last element tested.
Using this procedure, any faulty element in the system will
be identified.
If the
self-test concludes with
no
fault

reported,
any
problem encountered must be in the vehicle
or
as a
result
of
incorrect
use.

The Asterisk
(*)
lcon?'fi ^^
G * s ^

When available, selecting
the
asterisk icon will bring
up
the
following menu
of
general facilities:
ic
•
•
*
•
• ~',"•'.
•
•
,
•., .,
Resume
Abort . ..

Status
• •
Setup ., , ,
Print Screen
Show trace : T'J
Print trace
D
•u
_ ,1

1
l»
.
*-«•

-
-•

,
'
•

Resume
Return
to the
screen from which
you
selected
the

asterisk
icon.

Abort
•
'•'•'"'
• '• "
'"'^''•'
"'-

' Return
to the PDU
Main Menu.
' ' ' ••'""

Self-Test Problems
If
the
self test software will
not
load
or if
unidentified
problems
are
encountered during
the
self-test,
go to the

problem solving procedure
in
the PDU installation guide.
Be prepared
to
record
any
problem codes which
are

reported during problem solving.
The
Genrad Service
Centre will require
the
problem code number
to
identify
the correct remedial action
and
replacement parts.
Status
Show
the
current software level
and the
application
currently loaded.
--«
^
^.« - ...

•
^f;;fc.i.*ir.
....-^i^cw'i*;*^--'. Print Screen
Send
the
current screen display
to the
printer
.iia*M--i^-Vj^W'JStS:'
.

Show Trace
••'- •
'B-T'^TS
o^
•._,
^,„„, ,' J

rbisplay'the current contents
of
the fracelmemorylDri
^

the screen
(Use the
Down
and
Up^ arrows
to
scroll
•,

through
the
display
if
more than
one
screenful). •
Ai..;:
. ; •
,\J-'!-MT.'
0'; I

Print Trace
•-l.---^,^
• ,\.
^,
,./j-,i:,
Q
:;

Send
the
current contents
of
the trace memory
to the

printer.
I
a-.-s.-™.*'.-jc^.'-v*

September 1996? 9-69,