Mercury MerCruiser D2.8L D-Tronic Service Manual page 485

SERVICE MANUAL NUMBER 22
INSTRUMENTED INJECTOR [NEEDLE MOVEMENT SENSOR (NBF)]
The injector timing reference is supplied to the ECM by way of the Instrumented Injector
(Needle Movement Sensor) in the cylinder number 1 injector. This position variable type
input creates the timing signal for the ECM. This signal is used for a number of control and
testing functions within the ECM.
Instrumented Injector
A failure in the Instrumented Injector circuit should set Code P1201 or P1725. Display of
these codes indicates a failure in the sensor circuit, so proper diagnosis will lead to either
repairing a wiring problem or replacing the sensor.
90-860074--1 FEBRUARY 2002
a - Instrumented Injector
b - Electrical Harness Connector
c - Locking Tab
b
c
a
DESCRIPTION
75339
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