Mercury MerCruiser MCM 454 Mag MPI Service Manual page 641

GENERAL SYSTEM DIAGNOSTICS
MEFI 3 - ECM Wiring
IC MODULE
PNK
902
B
RED
FROM IGNITION
2 WAY GRAY
RELAY
CONNECTOR
TO IGNITION RELAY
3 PNK
TERMINAL 86
TEMP
SENDER
TO TACH
TO TEMP GAUGE
TO IGN
Index
Page 5E-48
Downloaded from https://needmanual.com/
PAGE 4 of 4
EST MODULE
B A
BRN
2 WAY BLACK
CONNECTOR
B A
A
121 WHT
121 WHT
C
D
B
E
A
F
A
GRY F
BLU/TAN
B E
TAN
PUR
D TAN/BLU
C
450 BLK
450 BLK
450 BLK
423 WHT
430 PUR/WHT
424 TAN/BLK
453 RED/BLK
29 DK GRN
585 TAN/WHT
208 BRN
CONNECTOR HALVES
TO SWITCH
TO AUDIO
WARNING HORN
SERVICE MANUAL NUMBER 23
ECM
ECM
J1-4
GROUND
J1-5
ECM
GROUND
J1-20 ECM
GROUND
J1-10
IGNITION CONTROL
DIST. REFERENCE
J2-10
"HIGH"
J1-24 BYPASS
DIST. REFERENCE
J1-3
"LOW"
AUDIO WARNING
J1-26
CIRCUIT
TRANSMISSION
J2-8
OVERTEMP SWITCH
NOT USED
J1-22
76082
90-861326--1 MARCH 1999