SERVICE MANUAL NUMBER 24
DIAGNOSTICS
MEFI 3 (EXCEPT BLACK SCORPION)
DISTRIBUTOR
WHT/GRN
WHT/RED
ECM
MEFI 1 MEFI 3
MEFI 2
439
PNK
J2-10
J1-2
430
PPL/WHT
B+
902 RED
121 WHT
121 WHT
+
–
IGNITION
COIL
TEMP SENDER
121
WHT
MEFI 1 MEFI 3
MEFI 2
A
B
C
F
E
D
208 BRN
J2-20
J2-8
901 TAN
585 TAN/WHT
IGNITION
3 PNK
29 DK GRN
J1-26
CIRCUIT DESCRIPTION:
Several discrete switch inputs are utilized by the fuel injection system to identify abnormal
conditions that may affect engine operation. A pull-up switch is currently used in conjunction
with the ECM to detect critical conditions to engine operation.
If a discrete switch changes states from its normal at-rest position, that is normally open to
closed (or closed to open), the ECM senses a change in voltage and responds by activating
the audio warning system.
DIAGNOSTIC AIDS:
•
Check engine oil and gear lube levels. Check transmission fluid for overheat condi-
tion.
An intermittent problem may be caused by a poor or corroded connection, rubbed through
wire connection, or a wire that is broken inside the insulation.
Index
90-861327--1
OCTOBER 1999
Page 5G-47
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 305 CID, Mercury MerCruiser 350 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 Engines Service Manual Number 24 GM V-8 305 CID 350 CID 4.0 out of 4.0 based on 1 product reviews. Great performance engine.
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