SERVICE MANUAL NUMBER 23
GENERAL SYSTEM DIAGNOSTICS
MEFI 2 - 7.4L MPI Symptom Chart (J-1 Circuits) (Continued)
Circuit
(CKT)
Function Number Color Ignition
Normal Voltage
Diagnostic
Trouble
Codes
Pin
Wire
Possible
Symptoms
Pin
Engine
(#)
ON
Running
DTC(s)
J2-12 Not Used
–
–
–
–
–
–
LT
BLU/
BLK
Rough Un-
stable or In-
correct Idle
IAC “A”
J2-13
Not Us-
able
Not
Usable
442
443
None
Low
LT
GRN/
WHT
Rough Un-
stable or In-
correct Idle
IAC “B”
J2-14
Not Us-
able
Not
Usable
None
None
Low
Rough Run-
ning, Lack
Of Power,
Poor Perfor-
mance
0
0
Injector
J2-15
450
BLK
Ground
(NOTE 5) (NOTE 5)
J2-16 Not Used
J2-17 Not Used
J2-18 Not Used
J2-19 Not Used
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Rough Run-
ning, Poor
Idle, Lack Of
Performance
Fuel
Injector
Ground
0
0
J2-20
J2-21
450
467
BLK
None
None
(NOTE 5) (NOTE 5)
Rough Idle,
Lack Of
Power, Stal-
ling
Injector
Driver
DK
BLU
B+
B+
Port Fuel
Jumper
J2-22
J2-22
901
901
BLK
BLK
–
–
–
–
–
–
–
–
Port Fuel
Jumper
Stall, Will
Restart In
Bypass
Ignition
Control
Signal
0
J2-23
423
WHT
1.2V
42
(NOTE 5)
Mode, Lack
Of Power
Ignition
Control
Bypass
Lack Of
Power,
Fixed Timing
0
TAN/
BLK
J2-24
424
–
4.5V
–
42
–
(NOTE 5)
J2-25 Not Used
–
–
–
Index
90-861326--1
MARCH 1999
Page 5E-29
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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