Mercury V8 250 User Manual

PCM 112 Pinouts
Connector A
AA1 AB1
AC1 AD1 AE1 AF1
AG1
AH1
AA2 AB2
AC2 AD2 AE2 AF2 AG2
AH2
AA3 AB3
AC3 AD3 AE3 AF3 AG3
AH3
AA4
AB4
AC4 AD4 AE4 AF4 AG4
AH4
A
B1A B1B
B1C B1D B1E B1F B1G B1H B1J B1K
B1L
B1M
B2B
B2B
B2C
B2D B2E B2F B2G B2H B2J B2K
B2L
B2M
B3A B3B
B3C B3D B3E B3F B3G B3H B3J
B3K
B3L
B3M
B4A B4B
B4C
B4D
B4E
B4F B4G B4H B4J
B4L
B4M
B4K
B
C
57214
C1A
C1B
C1C
C1D
C1E
C1F
C1G
C1H
C2A
C2B
C2C
C2D
C2E
C2F
C2G
C2H
C3A
C3B
C3C
C3D
C3E
C3F
C3G
C3H
C4A
C4B
C4C
C4D
C4E
C4F
C4G
C4H
Pin Function Wire Color Application Notes Description
AA1 Tachometer output signal Gray –
Provides a signal to drive a conventional analog
tachometer.
AB1
Fuel injector driver—cylinder
number 8
Pink/light
green
Not used on V6
The PCM grounds this pin to turn on the injector and
spray fuel into the intake of cylinder number 8.
AC1
Fuel injector driver—cylinder
number 7
Pink/white Not used on V6
The PCM grounds this pin to turn on the injector and
spray fuel into the intake of cylinder number 7.
AD1
Fuel injector driver—cylinder
number 2
Pink/red –
The PCM grounds this pin to turn on the injector and
spray fuel into the intake of cylinder number 2.
AE1
Fuel injector driver—cylinder
number 5
Pink/blue –
The PCM grounds this pin to turn on the injector and
spray fuel into the intake of cylinder number 5.
AF1
Fuel injector driver—cylinder
number 4
Pink/yellow –
The PCM grounds this pin to turn on the injector and
spray fuel into the intake of cylinder number 4.
AG1 MP Alert Blue/red –
AH1 Ignition coil driver—number 4 Green/yellow
Fires cylinders 2
and 3 on V8; not
used on V6.
Directly drives the ignition coil by grounding the circuit
internally.
PCM 112 Important Information and Pinouts
90-8M0146617 eng JULY 2018 © 2018 Mercury Marine Page 2A-5

Mercury V8 250 Specifications

General

Brand	Mercury
Model	V8 250
Category	Outboard Motor
Language	English