Porsche 928 Workshop Manual page 58

928
Maintenance, Selfdiagnosis
03
if the 0000 display does not appear. there is an
error (check with reference to the circuit
diagram). it is possible to move on to the next
testing step at any time. To do this, press the
green key until the clear symbol appears.
initiate the idle contact testing step.
Display:
I
Press the accelerator pedal slightly. After
approx. 20 mm, the LED must go out and the
following display must appear.
If this is not the case, there is a fault in the
area of the idle contact (see idle contact
trouble-shooting).
a
Functional check of sctustor and input signals
03 - 9
Printed in Germany - XX, 1988