Mercury MerCruiser MCM 502 Mag MPI User Manual

GENERAL SYSTEM DIAGNOSTICS SERVICE MANUAL NUMBER 23
Page 5E-12 90-861326--1 MARCH 1999
MEFI 1 - 454/502 Mag MPI and 8.2L MPI Symptom Chart (J-1 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
J1-28 Not Used – – – – – –
J1-29
MAP
Ground
814 BLK
0
(NOTE 5)
0
(NOTE 5)
33
Lack Of
Perfor-
mance,
Exhaust
Odor, Stall
J1-30
ECM
Ground
450
BLK/
WHT
0
(NOTE 5)
0
(NOTE 5)
None No Start
J1-31
MAP 5V
Refer-
ence
416 GRY 5V 5V 33
Lack Of
Power,
Surge,
Rough Idle,
Exhaust
Odor
J1-32 Battery 440 ORN B+ B+ None No Start
MEFI 1 - 454/502 Mag MPI and 8.2L MPI Symptom Chart (J-2
Circuits)
See page 5E-4 for NOTES
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
J2-1
Not
Used
– – – – – –
J2-2
Not
Used
– – – – – –
J2-3
Not
Used
– – – – – –
J2-4
Not
Used
– – – – – –
J2-5
Injector
Driver
468
LT
GRN
B+ B+ None
Rough Idle,
Lack Of
Power, Stall
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Index

Mercury MerCruiser MCM 502 Mag MPI Specifications

General

Brand	Mercury
Model	MerCruiser MCM 502 Mag MPI
Category	Engine
Language	English