Porsche 1989 944 S2, Workshop Manual

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944 Maintenance, Self-diagnosis
03
DME control unit error diagnosis
DME control unit error diagnosis 944 S
as from 88 model
As from model year 88, the DME control unit
944 S is capable of a self-diagnosis. That is to
say, the control unit is capable of detecting,
storing and displaying system errors. The con-
trol unit capable of diagnosis is identified by
an altered part number. A specially developed
diagnostic tester (special tool No. 9268) is
then used to read out the error memory and
to test specific components and control sig-
nals af the fuel and ignition system.
87/793
Important: Before diagnosis, the battery or
the connector of the DME control unit must
not be disconnected as otherwise the error
memory will be erased.
DME control unit error diagnosis
Printed in Germany - XVI, 1987
03 - 1