MULTI-PORT FUEL INJECTION DESCRIPTIONS AND SYSTEM OPERATION
SERVICE MANUAL NUMBER 23
The ECM controls the primary current going to the ignition coil. It sends a voltage signal to
the IC module that sends a voltage signal to the ignition coil. This signal will trigger the coil
creating secondary spark to be produced. The secondary spark is sent to the distributor and
then to the correct cylinder by high tension leads.
The Ignition Control (IC) module maintains the base ignition timing. It also has a 27-degree
spark advance built into it in case there is a Code for an IC operation failure detected while
the engine is running. The engine will continue to run but at reduced performance.
n
BLK
BLU
BRN
GRY
GRN
ORN
PNK
PUR
RED
TAN
WHT
YEL
LIT
=
=
=
=
=
=
=
=
=
=
=
=
=
=
BLACK
BLUE
BROWN
GRAY
GREEN
ORANGE
PINK
PURPLE
RED
ECM
o
m
a
b
c
450 BLK
J1-4
J1-5
TAN
WHITE
YELLOW
LIGHT
DARK
4
50 BLK
50 BLK
DRK
4
J1-20
A B
BRN
d
e
PNK
423 WHT
J1-10
J2-10
J1-24
J1-3
4
30 PUR/WHT
424
TAN/BLK
f
g
l
4
53 RED/BLK
i
B
A
902
RED
B
A
121 WHT
h
k
j
76082
Typical System Shown
a - ECM Ground
b - ECM Ground
c - ECM Ground
d - Ignition Control
e - Distributor Reference HIGH
f - Bypass
g - Distributor Reference LOW
h - To Tachometer
i - 2-Way Black Connector
j - 2-Way Gray Connector
k - From Ignition Relay
l - 2-Way Coil Jumper Harness
m - IC Module
n - 8 Cylinder Distributor
o - Pick-up Coil
Page 5B-26
90-861326--1 MARCH 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(1 votes, average: 5 out of 5)
Marine readers have rated Mercury MerCruiser GM V8 GM V8 454 CID 7.4L and 502 cid 8.2L Marine Engines Service Manual Number 23 5.0 out of 5.0 based on 1 product reviews. Just need the manual. Wrote review. Can't technically review what I haven't seen yet...