ECM Connector and EFI Symptoms Chart (J-1 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
J1-17
J1-18
J1-19
J1-20
–
461
–
–
–
5V
–
–
5V
–
–
None
–
–
Serial
Data
ORN/
BLK
No Serial Data
(NOTE 6)
Not
Used
–
–
–
–
Not
Used
–
–
–
–
Lanyard
Stop
J1-21
942
PNK
0
0
NONE
No Start
Switch
Not
Used
J1-22
J1-23
J1-24
J1-25
J1-26
J1-27
J1-28
J1-29
J1-30
–
–
–
–
–
–
–
–
–
–
–
Not
Used
–
IAT
Sensor
Poor Fuel Economy, Exhaust
Odor
472
–
TAN
–
5V
–
(NOTE 2)
23
–
Not
Used
–
–
–
–
–
–
–
–
Not
Used
–
–
–
–
Not
Used
–
–
–
–
Not
Used
–
–
–
–
MAP
Ground
0
(NOTE 5)
0
(NOTE 5)
Lack Of Performance,Exhaust
Odor, Stall
814
450
BLK
33
None
ECM
Ground
BLK/
WHT
0
(NOTE 5)
0
(NOTE 5)
No Start
MAP 5V
Refer-
ence
Lack Of Power, Surge, Rough
Idle, Exhaust Odor
J1-31
J1-32
416
440
GRY
ORN
5V
B+
5V
B+
33
Battery
None
No Start
NOTE: The Intake Air Temperature (IAT) Sensor [J1-24] is not used on the 7.4L / 7.4LX Throttle Body Injection
system. J1-21 is not used on 1997 and newer models.
See page 5C-29 for NOTES
Index
90-823224--2 796
ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5C-31
| 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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