ECM Connector and EFI Symptoms Chart (J-2 Circuits)
Circuit
(CKT)
Num-
ber
Diag-
nostic
Trouble
Codes
DTC(s)
Normal Voltage
Pin
Func-
tion
Wire
Color
Possible
Symptoms
Pin
Ignition
ON
Engine
Running
(#)
Not
Used
J2-1
J2-2
J2-3
J2-4
J2-5
–
–
–
–
–
–
–
–
–
–
–
–
Not
Used
–
–
–
Not
Used
–
–
–
–
Not
Used
–
–
–
–
–
Injector
Driver
LT
GRN
468
B+
B+
None
Rough Idle, Lack Of Power, Stall
Ignition
Control
Ref.
BLK/
RED
0
(NOTE 5)
0
(NOTE 5)
J2-6
J2-7
J2-8
463
901
430
None
None
None
Poor Performance
Low
Port
Fuel
Jumper
WHT
–
–
–
Ignition
Control
Ref.
PUR/
WHT
5V
1.6V
No Restart
High
Fuel
Pump
Relay
Driver
DK
GRN/
WHT
0
(NOTE
1&5)
J2-9
465
B+
None
No Start
–
Not
Used
J2-10
J2-11
–
–
–
0
–
–
0
–
–
Coolant
Over
temp.
DK
GRN
Power Reduction Mode or Improp-
er Audio Warning
112
NONE
Not
Used
J2-12
J2-13
J2-14
J2-15
J2-16
–
–
–
–
IAC “A”
Low
BLU/
BLK
Not
Usable
Not
Usable
442
443
450
–
None
None
None
–
Rough Unstable or Incorrect Idle
Rough Unstable or Incorrect Idle
IAC “B”
Low
GRN/
WHT
Not
Usable
Not
Usable
Injector
Ground
BLK/
WHT
0
(NOTE 5)
0
(NOTE 5)
Rough Running, Lack Of Power,
Poor Performance
Not
Used
–
–
–
–
NOTE: J2-7 is not used on the 7.4L / 7.4LX Throttle Body Injection system.
Index
5C-32 - ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY)
90-823224--2 796
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
Manuals are all Important for Technician
This book is invaluable if you do your own repairs. Great book.
Could not find a copy until a search brought me here.
Excellent print.
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