Battery Charging; Using The Pdu On The Vehicle; Vehicle Battery Adaptor; Vehicle Interface Adaptor - Aston Martin DB7 Workshop Manual

The Aston Martin Lagonda Diagnostic System
Installation Instructions
5^27
Battery Charging
The PDU is fitted with internal NICAD batteries
which allow the PDU to be transported whilst
retaining programs. The batteries are not designed
to be used as a general power source. A special
circuit monitorstheamountofcharge in the batteries
so that they cannot be overcharged.
From the time when first operating the system or a
PDU fitted with substitute batteries, it will take up
to 36 hours to achieve full charge. In the meantime,
the PDU can be used whilst connected to the base
station or to the vehicle battery. Keep transit times
to and from the vehicle as short as reasonably
possible to preserve battery charge.
Subsequent battery charges shou Id take six to seven
hours from fully discharged. The PDU must always
be left connected to the base station when not in
use in order to keep the batteries fully charged.
CAUTION: The rechargeable NICAD batteries
fitted to the PDU are of a special type and must
only be replaced with GenRad approved parts. Do
not substitute the batteries with any other type.
Always dispose of old batteries in compliance with
local recycling regulations. The procedure for
changing the battery pack is described later in this
installation guide.
Operating Procedures
Refer to the Aston Martin Diagnostic System Users
Guide for detail on each of the PDU software
options
Selecting Diagnostics
1. Switch on the PDU, the main menu w i l l be
displayed.
2. Select 'Run Diagnostic' from the main menu and
confirm the selection by pressing the 'tick' icon. A
sequence of menus w i l l be displayed requesting
identification of the vehicle under test.
3. The system will load the appropriate software.
4. On completion of software loading, disconnect the
PDU from the base station and transfer it in its
carrying case to the vehicle. The additional pockets
in the carrying case may be used for carrying any
interface cables required.
5. If the VIA is required, also transfer it in its carrying
case to the vehicle together with any vehicle
interface cable required.
Using the P D U on the Vehicle
At the vehicle, the PDU may be removed from its
carrying case if required. The PDU should always
be connected to the vehicle using the Vehicle
Battery Adaptor (VBA) (0024). The PDU w i l l
continue to charge from the vehicle battery.
Vehicle Battery Adaptor
This unit transforms battery voltage to the correct
level for the PDU. The VBA (Fig 13) also contains
electrical filters to protect the PDU from any voltage
spikes or other interference from the vehicle which
could affect PDU operation.
f=l
a
OOOOOQS.fl
- d l D :
Figure 13. The vehicle battery adaptor
Vehicle Interface Adaptor
When the software requires the Vehicle Interface
Adaptor to be used, it is powered from the vehicle
battery (Fig 14). The Vehicle Battery Adaptor
incorporates a socket into which the VIA to VBA
cable (0028) is inserted. The opposite end of this
cable is inserted into the connector on the VIA
panel.
_a
hOOOOQpH"
-CIC=
= d D
n
S
© ® ® ® © ©
Figure 14. The vehicle interface adaptor
9-14
May 1996