Porsche 928 Workshop Manual page 54

920 Maintenance, Self-diagnosis
03
Starting error diagnosis
Condition:
Engine off
lgnkion on
Display:
Press the green key until the clear symbol ap-
pears on the function display.
Display:
Clear lymbol
The diagnosis sequence for the LH control unit
takes place first foflowed by that of the EZK
control unk.
If an error is displayed- make a note of the
error (e.g. 1211).
0
The error is displayed until the green key is
pressed again on the tester. The next error
code is then displayed, if applicable.
This must be repeated until 1000 appears on
the display.
If there is no error, the following display ap-
pears.
Display:
1
a
Starting emr diagnosis
03 - 5
Printed in Germany - XX, 1989