Porsche 928 Workshop Manual page 91

03
Self-diagnosis
928
Proceed with key 1
Prerequisite:
Eng. at oper. temp.
L
With a,, COnSumerS
and ignition off
Pmceec with key >
me particular systenl can be Selmed by means of key 1.2 or 3.
For instance with key 2 the following display appe*rs:
pjijijg
~ y$/'@='Qn N 1
If key N is preSSed
= return to menu.
If key I is pressed:
pizc-1
3.5 Engine-knock registration
The engine~knock registration function can only be triggered
through the EZK DC LIME control unit.
TO this end. opera,e the S"stemte*ter 9288 as described in 3.1
until the following display appears:
Kl
Proceed with key -
The following menu display appears:
p%&.
I.~...~ .-.-., 2
Proceed With key 2
Condition:
Engine at operating
temperature
Proceed with key -
-z start knock
registration before
test drive
->
Proceed With key ~-
Ed--
requisite
I
Proceed with key :'
-z stop the test
drive only if the
display with the no.
1 Of knocks comes on.
Proceed with key L'
L
Pressing key 1 activates the engine-knock cc'unter:
Knock registration
I" progress
Please wait!
03 - 46
Operating Instructions for System Tester 9288
Printed in Germany
- XNi.1!389