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)
Poor Perfor-
mance,
Map
Signal
LT
GRN
1.46V
(NOTE 3)
Surge, Poor
Fuel Econo-
my, Exhaust
Odor
J1-9
432
4.9V
33
21
Poor Perfor-
mance And
Accelera-
tion, Incor-
rect Idle
TP
Signal
DK
BLU
.62V
.62V
(NOTE 4) (NOTE 4)
J1-10
J1-11
417
Ignition
Fused
439
–
PNK
–
B+
–
B+
–
None
–
No Start
–
J1-12 Not Used
High Idle,
Rough Idle,
Poor Perfor-
mance Ex-
haust Odor
TP and
IAT
Ground
0
0
J1-13
J1-14
813
BLK
21,23
(NOTE 5) (NOTE 5)
0
0
ECM
Ground
450
416
BLK
None
21
No Start
(NOTE 5) (NOTE 5)
TP 5V
Refer-
ence
Lack Of
Power, Idle
High
J1-15
J1-16
GRY
5V
5V
Battery
440
–
ORN
–
B+
–
B+
–
None
–
No Start
–
J1-17 Not Used
No Serial
Data
(NOTE 6)
Serial
J1-18
461
ORN
5V
5V
None
Data
J1-19 Not Used
J1-20 Not Used
J1-21 Not Used
J1-22 Not Used
J1-23 Not Used
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Poor Fuel
Economy,
Exhaust
Odor
IAT Sen-
J1-24
sor
472
TAN
5V
(NOTE 2)
23
J1-25 Not Used
J1-26 Not Used
–
–
–
–
–
–
–
–
–
–
–
–
Index
90-861326--1
MARCH 1999
Page 5E-27
| 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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