Mefi 1 - 454/502 Mag Mpi And 8.2L Mpi Symptom Chart (J-2 Circuits) - Mercury MerCruiser MCM 454 Mag MPI Service Manual

SERVICE MANUAL NUMBER 23

MEFI 1 - 454/502 Mag MPI and 8.2L MPI Symptom Chart (J-2 Circuits)

(Continued)
Index
90-861326--1 MARCH 1999
Downloaded from https://needmanual.com/
Circuit
Pin Pin (CKT) (CKT)
Pin
Function Number
(#)
Ignition
J2-6 463
Control
Ref. Low
Port Fuel
J2-7 901
Jumper
Ignition
J2-8 430
Control
Ref. High
Fuel
Pump
J2-9 465
Relay
Driver
J2-10 Not Used –
Coolant
J2-11 112
Over
temp.
J2-12 Not Used –
IAC "A"
J2-13 442
Low
IAC "B"
J2-14 443
Low
Injector
J2-15 450
Ground
J2-16 Not Used –
J2-17 Not Used –
J2-18 Not Used –
J2-19 Not Used –
Fuel
J2-20 450
Injector
Ground
Injector
J2-21 467
Driver
Normal Voltage
Wire Wire
Color Ignition Engine
ON Running
0 0
BLK/
RED
(NOTE 5) (NOTE 5)
WHT – –
PUR/
5V 1.6V
WHT
DK
0
B+
GRN/
(NOTE 5)
WHT
– – –
DK
0 0
GRN
– – –
BLU/ Not Us- Not
BLK able Usable
GRN/ Not Us- Not
WHT able Usable
0 0
BLK/
WHT
(NOTE 5) (NOTE 5)
– – –
– – –
– – –
– – –
0 0
BLK/
WHT
(NOTE 5) (NOTE 5)
DK
B+ B+
BLU
GENERAL SYSTEM DIAGNOSTICS
Diagnostic
Trouble Tro ble Possible Possible
Codes Symptoms
DTC(s)
Poor Perfor-
None
mance
None –
None No Restart
None No Start
– –
Improper
None
Audio Warn-
ing
– –
Rough Un-
None
stable or In-
correct Idle
Rough Un-
None
stable or In-
correct Idle
Rough Run-
ning, Lack
None Of Power,
Poor Perfor-
mance
– –
– –
– –
– –
Rough Run-
ning, Poor
None
Idle, Lack Of
Performance
Rough Idle,
Lack Of
None
Power,
Stalling
Page 5E-13