GENERAL SYSTEM DIAGNOSTICS
SERVICE MANUAL NUMBER 23
MEFI 2 - 7.4L MPI Symptom Chart (J-1 Circuits)
Circuit
(CKT)
Function Number Color Ignition
Normal Voltage
Diagnostic
Trouble
Codes
DTC(s)
Pin
Wire
Possible
Symptoms
Pin
Engine
(#)
ON
Running
Poor Fuel
Economy,
Poor Perfor-
mance Deto-
nation
Knock
Sensor
Signal
J1-1
485
GRN
9.5V
9.5V
43
Poor Perfor-
mance, Ex-
haust Odor,
Rough Idle
RPM Reduc-
tion
ECT
Signal
1.95V
(NOTE 2) (NOTE 2)
1.95V
J1-2
J1-3
410
–
YEL
–
14
–
Not Used
–
–
–
–
–
Audio Warn-
ing Activated
(Low Oil
Pressure/
Low I/O
Fluid/Trans-
mission
Fluid/Over-
heat) Note:
Earlier Mod-
els Use J1-4
Discrete
Switches
J1-4
J1-5
J1-6
911
916
911
BRN
YEL
BRN
None
None
None
Lack Of
Data From
Other En-
gine (Dual
Engine
Master/
Slave
B+
B+
Only)
Audio Warn-
ing Activated
(Low Oil
Pressure/
Low I/O
Fluid/Trans-
mission
Discrete
Switches
–
–
Fluid/Over-
heat) Note:
Later Mod-
els Use J1-6
Incorrect
Idle, Poor
Performance
Diagnos-
tic Test
BLK/
WHT
J1-7
J1-8
451
–
B+
–
B+
–
None
–
Not Used
–
–
Index
Page 5E-26
90-861326--1 MARCH 1999
| 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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Marine readers have rated Mercury MerCruiser GM V8 GM V8 454 CID 7.4L and 502 cid 8.2L Marine Engines Service Manual Number 23 5.0 out of 5.0 based on 1 product reviews. Just need the manual. Wrote review. Can't technically review what I haven't seen yet...