Porsche 928 Workshop Manual page 66

928
Maintenance, Self-diagnosis
03
a
Trouble-shooting Error code 1111
LH control unit
The supply voltage is too low
-z 10Vortoohigh > 16V.
Diagnosis using the tester can only indicate
the error path but not a defective com-
ponent.
Possible causes of inadequate supply voltage.
Battery exhausted
Poor contact to the grounding strap
Note:
Poor contact in the control unit
The entire error memory must be read out
A defective regulator may be the cause of ex-
before trouble-shooting.
cessive supply voltage.
a
Troubleshooting
03- 19
Prfnted in Germany - XX, 1988