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
(#)
Knock
Sensor
Signal
Poor Fuel Economy,
Poor Performance
Detonation
J1-1
J1-2
485
410
BLK
YEL
9.5V
9.5V
43
14
Poor Performance,
Exhaust Odor, Rough Idle
RPM Reduction
ECT
Signal
1.95V
(NOTE 2)
1.95V
(NOTE 2)
Not
Used
J1-3
J1-4
J1-5
J1-6
–
–
–
–
–
–
–
–
–
Not
Used
–
–
–
Master/
Slave
Lack Of Data From Other Engine
(Dual Engine Only)
916
931
YEL
BRN
B+
–
B+
–
None
None
Discrete
Switch
Power Reduction Mode
Diag-
nostic
Test
WHT/
BLK
J1-7
451
B+
B+
–
None
Incorrect Idle, Poor Performance
–
Not
Used
J1-8
J1-9
–
–
–
–
33
Map
Signal
LT
GRN
1.46V
(NOTE 3)
Poor Performance, Surge, Poor
Fuel Economy, Exhaust Odor
432
417
439
–
4.9V
TP
Signal
DK
BLU
.62V
(NOTE 4)
.62V
(NOTE 4)
Poor Performance And Accelera-
tion, Incorrect Idle
J1-10
J1-11
J1-12
21
Ignition
Fused
PNK/
BLK
B+
–
B+
–
None
–
No Start
–
Not
Used
–
TP and
IAT
Ground
0
(NOTE 5)
0
(NOTE 5)
High Idle, Rough Idle, Poor Perfor-
mance Exhaust Odor
J1-13
J1-14
813
450
BLK
21,23
None
ECM
Ground
BLK/
WHT
0
(NOTE 5)
0
(NOTE 5)
No Start
TP 5V
Refer-
ence
J1-15
J1-16
416
440
GRY
ORN
5V
B+
5V
B+
21
Lack Of Power, Idle High
No Start
Battery
None
See Page 5C-29 For NOTES
Index
5C-30 - 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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