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
J2-17
J2-18
J2-19
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Not
Used
Not
Used
Fuel
Injector
Ground
BLK/
WHT
0
(NOTE 5)
0
(NOTE 5)
Rough Running, Poor Idle, Lack
Of Performance
J2-20
J2-21
J2-22
450
467
901
None
None
–
Injector
Driver
DK
BLU
Rough Idle, Lack Of Power,
Stalling
B+
–
B+
–
Port
Fuel
Jumper
WHT
WHT
–
Ignition
Control
Signal
0
(NOTE 5)
Stall, Will Restart In Bypass
Mode, Lack Of Power
J2-23
J2-24
423
424
1.2V
4.5V
42
42
Ignition
Control
Bypass
TAN/
BLK
0
(NOTE 5)
Lack Of Power, Fixed Timing
Not
Used
J2-25
J2-26
–
–
–
–
–
–
–
–
–
–
–
–
Not
Used
Discrete
Switch
Signal
J2-27
J2-28
J2-29
31
TAN
–
–
–
Audio Warning System Activated
Rough Unstable or Incorrect Idle
Rough Unstable or Incorrect Idle
IAC
“A”
High
BLU/
WHT
Not
Usable
Not
Usable
441
444
None
None
IAC
“B”
Low
GRN/
BLK
Not
Usable
Not
Usable
Not
Used
J2-30
J2-31
J2-32
–
419
–
–
–
–
–
None
–
–
MIL
Lamp
BRN/
WHT
0
(NOTE 5)
0
(NOTE 5)
Lamp Inoperative
–
Not
Used
–
–
–
NOTE: J2-22 is not used on the 7.4L / 7.4LX Throttle Body Injection system
See page 5C-29 for NOTES
Index
90-823224--2 796
ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5C-33
| 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.
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Excellent print.
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