Porsche 1989 944 S2, Workshop Manual

Page: 48 / 167

03
Self-diagnosis 944
After pressing the key > , a selection menu is displayed:
Menu
1 = Fault memory
2 = Drive links
3 = Input signals >
< Menu
1 = System adaptation
In the example - press key 1. There then follows the display of
the number of errors which are stored (if any).
Number of
faults
- 2 -
Proceed with key >
Additional info to
every display with
key 1
continue: >
Proceed with key >
Error output:
1: Engine
temperature sensor 2
Short to ground
not present
If key 1 is pressed instead of the > key, the corresponding error
code display appears (the last two digits of the flashing code).
Fault code: - 14 -
Proceed with key >
Further errors are displayed (if they exist):
2 : Idle contact
Short to ground
present
If key 1 is pressed instead of key > the corresponding error-code
display appears (the last two digits of the flashing code).
Fault code: - 12 -
After the last displayed error, the following instruction appears:
Repair fault accord-
ing to repair
instructions
Continue: >
Proceed with key >
Fault repaired ?
1 = yes
3 = no
Return to display "No. of errors" with key 3.
Proceed with key 1:
Fault memory
1 = Erase
3 = Do not erase
If key 3 is pressed:
= Return to menu "error memory".
The error memory is not erased!
Proceed with key 1:
Fault memory
has been cleared
Return: N
The test scope "Read-out error memory" is terminated
at this point.
3.2 Actuator diagnosis
If an actuator is selecled, this is triggered by the ECU so that it can
be checked for correct functioning.
The various actuators components are gone through one after
the other and are selected with the > key.
Operate the Systemtester 9288 as described under 3.1 until
the following menu display appears:
Menu
1 = Fault memory
2 = Drive links
3 = Input signals >
After pressing key 2, the display for the first actuator appears:
Injector
to activate
1 = Start
Continue: >
If key > is pressed, the next actuator is selected.
Pressing key 1 results in the following instruction:
Can injectors be
heard / felt?
1 = yes
3 = no
03 - 36 Operating instructions for System Tester 9288
Printed in Germany - XXIV, 1991