Fuel Quantity Actuator (Pump Actuator) - Mercury MerCruiser D2.8L D-Tronic Service Manual

EDI DIAGNOSIS

Fuel Quantity Actuator (Pump Actuator)

Scan Code:
Blink Code:
Malfunction Indicator Lamp:
CIRCUIT DESCRIPTION:
Inside the electronic diesel pump the Fuel Quantity Actuator (a rotary solenoid actuator) for
injected fuel quantity control 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). When no voltage is applied to the actuator, its
return springs reduce the injection quantity to zero.
A failure of the Fuel Quantity Actuator circuit should set a Scan Code P1220.
4
5
49
23
45
68
Page 5E-34
a
7
6
1
b
5
2
4
3
a - Fuel Quantity Actuator (Inside Injection Pump)
b - Harness Connector
c - Battery Supply Voltage To Sensor From ECM
d - Sensor Ground (–)
e - Twisted Wire Pair
CKT PIN
Fuel Quantity Actuator (1 of 3 total, one of a twisted pair)
Fuel Quantity Actuator (2 of 3 total, second of a twisted pair)
Fuel Quantity Actuator (3 of 3 total)
Battery Supply Voltage (1 of 3)
Battery Supply Voltage (2 of 3)
Battery Supply Voltage (3 of 3)
SERVICE MANUAL NUMBER 22
P1220
1223
ON
b
75409
RED
RED
RED
RED
GRN/WHT
e
GRN/WHT
GRN/WHT
NAME
90-860074--1 FEBRUARY 2002
ECM
c
23
c
45
c
68
4
d
5
d
49
d
75565