Mercury V6 175 Diagnostic Manual page 275

1 - Fuel injector 1
2 - Fuel injector 2
3 - Fuel injector 3
4 - Fuel injector 4
5 - Fuel injector 5
6 - Fuel injector 6
7 - PCM connector A
Connector
65694
A
86
87
Hot stud ring terminal
MPR
MPR
90-8M0146617 eng JULY 2018
Pin Wire Color
A Red/orange
Pink/brown
A
Pink/red
B
Pink/orange
B
Pink/yellow
Pink/blue
Pink/purple
A Pink
B
B Black
53172
30 Red/pink
30
85 Yellow/black
86 Red/blue
85
87 Pink
59637
30
86 Yellow/purple
87 Red/white
8 - Fuel supply module
9 - Fuel pump relay
10 - Main power relay
11 - Hot stud
12 - Fuse holder ‑ three 20‑amp fuses shown
13 - Chassis ground
Fused (20 A) 12 V power (+)
Fused (20 A) 12 V power (+)
Fuel pump relay (FPR) control
Fused (20 A) 12 V power (+)
Red
Main power relay (MPR) control signal
© 2018 Mercury Marine
Troubleshooting and Diagnostics
Function
Fuel injector 1
Fuel injector 2
Fuel injector 3
Fuel injector 4
Fuel injector 5
Fuel injector 6
Fuel pump 12 V power (+)
Chassis ground (–)
Fuel pump 12 V power (+)
12 V battery power (+)
Switched 12 V power (+)
PCM
–
AF3
AD1
AF4
AF1
AE1
AF2
–
–
–
AB4
–
–
–
AA2
–
Page 7B-7