Porsche 1989 944 S2, Workshop Manual

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944 Maintenance, Self-diagnosis
03
Troubleshooting
Diagnosis using the tester can refer only to
the error path, but not to a defective
component.
Note:
Before troubleshooting, the entire error
memory must be read out.
Error code 1111
The supply voltage is too low
< 10 V or too high > 16 V.
Possible causes for too low a supply
voltage:
Battery exhausted
Poor contact on the grounding strap
Poor contact on the control unit
A defective regulator may be the cause
of
too high a supply voltage.
Troubleshooting
Printed in Germany - XVI, 1987
03 - 19