Aston Martin DB7 Workshop Manual page 369

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
N O - 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'.
N O - Co to step 13
Figure 17. PDU hard error code
Step 1 3
Observe the screen display. Is the screen displaying the main menu (Fig 9)?
Y E S - C o to step 14
N O - Go to step 15
Step 1 4
Select the PDU system self test option and press the 'tick' icon. Does the screen respond?
YES - Co to step 15
N O - 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
N O - Co to step 16
Figure 18. Communications blocked
9-18
May 1996