MerCruiser 305 CID (5.0L) Service Manual page 641

DIAGNOSTICS
Wiring System Diagrams
MEFI 1 and MEFI 2
TO INJECTOR FUSE
439 PNK/BLK
TO IGNITION RELAY
FUEL PUMP FUSE
FUEL PUMP RELAY
TO ECM/BAT FUSE
440 ORN
Index
Page 5G-14
INJECTORS - ONE IF EFI, FOUR IF MPI
(INJECTORS 2, 3, 5, 8 - IF FOUR)
INJECTORS - ONE IF EFI, FOUR IF MPI
(INJECTORS 1, 4, 6, 7 - IF FOUR)
450 BLK/WHT
120 GRY
IDLE AIR CONTROL MOTOR
BLK
450 BLK/WHT
K A
J B
H C
G D
F E
DATA LINK CONNECTOR
467 DK BLU
450 BLK/WHT
450 BLK/WHT
468 DK GRN
901 WHT
901 WHT
465 GRN/WHT
A B
M 150 BLK
FUEL PUMP
D 441 BRN or BLU/WHT
C
442 RED or BLU/BLK
B
443 YEL or GRN/WHT
A
444 GRN/BLK
461 ORN/BLK
916 YEL
451 WHT/BLK
419 BRN/WHT
SERVICE MANUAL NUMBER 24
INJECTOR DRIVER
J2-21
INJECTOR GROUND
J2-15
J2-20
INJECTOR GROUND
INJECTOR DRIVER
J2-5
PORT FUEL JUMPER
J2-7
(MPI ONLY)
PORT FUEL JUMPER
J2-22
(MPI ONLY)
FUEL PUMP
J2-9
RELAY DRIVER
IAC COIL "A" HIGH
J2-28
J2-13 IAC COIL "A" LOW
J2-14
IAC COIL "B" HIGH
J2-29
IAC COIL "B" LOW
J1-18
MASTER/SLAVE
SERIAL DATA
J1-5
DIAGNOSTIC "TEST"
J1-7
TERMINAL
MALFUNCTION
J2-31
INDICATOR LIGHT
75600
90-861327--1 OCTOBER 1999