Fuel Quantity Sensor (Control Sleeve Position Sensor) - Mercury MerCruiser D2.8L D-Tronic Service Manual

EDI DIAGNOSIS

Fuel Quantity Sensor (Control Sleeve Position Sensor)

Scan Code:
Blink Code:
Malfunction Indicator Lamp:
CIRCUIT DESCRIPTION:
Inside the electronic diesel pump the Fuel Quantity Actuator (a rotary solenoid actuator for
controlling injected fuel quantity) engages with the control collar through a shaft. Similar to
the mechanically governed fuel injection pump, the cutoff ports are opened or closed
depending upon the control collar's position. The injected fuel quantity can be infinitely
varied between zero and maximum (e.g., for cold starting). Using this Fuel Quantity Sensor
(an angle sensor or potentiometer) the fuel quantity actuator's angle of rotation, and thus
the position of the control collar, are reported back to the ECU. This information is used by
the ECM to determine the injected fuel quantity as a function of engine speed.
A failure of the Fuel Quantity Sensor circuit should set a Scan Code P1225.
7
33
29
52
Page 5E-36
a
7
6
b
5
4
3
a - Fuel Quantity Sensor (Control Sleeve Position Sensor)
b - Fuel Quantity Sensor Connector
c - Control Sleeve Position Sensor
d - Fuel Quantity Sensor (Measure Coil)
e - Control Sleeve Position Sensor Signal
f - Analog Ground (–)
CKT PIN
Control Sleeve Position Sensor (Middle Tap)
Analog Ground (–)
Control Sleeve Position Sensor
Fuel Quantity Sensor Input to ECM (Measure Coil)
P1225
1222
ON
1
2
SERVICE MANUAL NUMBER 22
b
GRN
29
BLU/YEL
52
ORN
7
33
BRN/PUR
NAME
90-860074--1 FEBRUARY 2002
ECM
c
d
e
f
75565