EDI DIAGNOSIS SERVICE MANUAL NUMBER 22
Page 5E-32 90-860074--1 FEBRUARY 2002
Instrumented Injector (Needle Movement Sensor)
Scan Code: P1201
Blink Code: 1132
Malfunction Indicator Lamp: ON
ECM
12
11
75339
1
2
WHT
BRN
1
2
a
b
c
d
e
a-Instrumented Injector (Needle Movement Sensor)
b-Harness Connector
c-Sensor ECM Signal
d-Sensor Ground (–)
e-Symbol for Shield Cable
CIRCUIT DESCRIPTION:
The injector timing reference is supplied to the ECM by way of the Instrumented Injector
(Needle Movement Sensor, or referred to sometimes as NBF) installed in the Number 1
Cylinder injector. This position variable type input device creates the timing signal for the
ECM. This signal is used for a number of control and testing functions within the ECM.
A failure in the Instrumented Injector circuit should set Scan Code P1201. Display of this
code indicates a failure in the sensor circuit, so proper diagnosis will lead to either repairing
a wiring problem or replacing the sensor.
CKT PIN
NAME
11 Sensor Ground (–)
12 Instrumented Injector Sensor Signal
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