Porsche 928 Workshop Manual page 78

03
Maintenance, Self-diagnosis 928
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Error code 2115
Error code 2121
This error code does not clearly determine
whether the fault is in the area of the full load
contact or in the area of the idle contact.
This error code indicates a fault in the area of
the load signal (e.g. partial load)
between the LH control unit and the EZK con-
trol unit
More detailed information is then given by
error code 2112 or 2113.
Possible faults
Break in the circuit
Shon-circuit to ground
If this load signal is not received by the EZK
control unit, ignition is retarded in the partial
load area and full load area.
0
Control value for an intact load signal
3000 limin 32" before TDC + 4"
In the event of a fault, check the cable harness
with reference to the circuit diagram.
03 - 32 Trouble-shooting, EZK control unit
Printed in Germany - XX, 1988
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