Mercury MerCruiser D2.8L D-Tronic Service Manual page 634

EDI DIAGNOSIS
RPM Signal From Injector (Secondary Engine Speed Sensor)
Scan Code:
Blink Code:
Malfunction Indicator Lamp:
CIRCUIT DESCRIPTION:
A secondary engine speed sensor signal called rpm Signal From Injector, is supplied to the
ECM by way of the Instrumented Injector in the Number 1 Cylinder.
When functioning for the ECM circuitry as the Secondary Speed Sensor, a failure in this
circuit will set a Scan Code P1725. 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.
11
12
Page 5E-66
a
a - Instrumented Injector (Needle Movement Sensor)
b - Harness Connector
c - Sensor ECM Signal
d - Sensor Ground (–)
e - Symbol for Shield Cable
CKT PIN
Sensor Ground (–)
Instrumented Injector Sensor Signal
SERVICE MANUAL NUMBER 22
P1725
3332
ON
b
e
2
1
BRN
WHT
NAME
90-860074--1 FEBRUARY 2002
ECM
11 d
c
12
75339