Mercury MerCruiser MCM 454 Mag MPI User Manual

GENERAL SYSTEM DIAGNOSTICS
SERVICE MANUAL NUMBER 23
90-861326--1 MARCH 1999 Page 5E-13
MEFI 1 - 454/502 Mag MPI and 8.2L MPI Symptom Chart (J-2 Circuits)
(Continued)
Pin
Circuit
(CKT)
Wire
Normal Voltage
Diagnostic
Tro ble
Possible
Pin
Pin
Function
(CKT)
Number
(#)
Wire
Color
Ignition
ON
Engine
Running
Tro
u
ble
Codes
DTC(s)
Possible
Symptoms
J2-6
Ignition
Control
Ref. Low
463
BLK/
RED
0
(NOTE 5)
0
(NOTE 5)
None
Poor Perfor-
mance
J2-7
Port Fuel
Jumper
901 WHT – – None –
J2-8
Ignition
Control
Ref. High
430
PUR/
WHT
5V 1.6V None No Restart
J2-9
Fuel
Pump
Relay
Driver
465
DK
GRN/
WHT
0
(NOTE 5)
B+ None No Start
J2-10 Not Used – – – – – –
J2-11
Coolant
Over
temp.
112
DK
GRN
0 0 None
Improper
Audio Warn-
ing
J2-12 Not Used – – – – – –
J2-13
IAC “A”
Low
442
BLU/
BLK
Not Us-
able
Not
Usable
None
Rough Un-
stable or In-
correct Idle
J2-14
IAC “B”
Low
443
GRN/
WHT
Not Us-
able
Not
Usable
None
Rough Un-
stable or In-
correct Idle
J2-15
Injector
Ground
450
BLK/
WHT
0
(NOTE 5)
0
(NOTE 5)
None
Rough Run-
ning, Lack
Of Power,
Poor Perfor-
mance
J2-16 Not Used – – – – – –
J2-17 Not Used – – – – – –
J2-18 Not Used – – – – – –
J2-19 Not Used – – – – – –
J2-20
Fuel
Injector
Ground
450
BLK/
WHT
0
(NOTE 5)
0
(NOTE 5)
None
Rough Run-
ning, Poor
Idle, Lack Of
Performance
J2-21
Injector
Driver
467
DK
BLU
B+ B+ None
Rough Idle,
Lack Of
Power,
Stalling
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Index

Mercury MerCruiser MCM 454 Mag MPI Specifications

General

Brand	Mercury
Model	MerCruiser MCM 454 Mag MPI
Category	Engine
Language	English