SERVICE MANUAL NUMBER 23
GENERAL SYSTEM DIAGNOSTICS
Chart A-1 (1 of 4): No Malfunction Indicator Lamp (MIL) -
Marine Diagnostic Trouble Code (MDTC) Tool Installed
e
g
h
i
461
451
ORN/BLK
b
f
a
j
WHT/BLK
k
l
d
c
m
n
a - ECM/DLC 15amp fuse
b - DLC Connector
c - Marine Diagnostic Code Tool
d - ECM, Injector Knock Sensor Module 10amp Fuse
e - (ORN-Some Models)
f - (BLK-Some Models)
g - Serial Data
h - ECM Ground
i - ECM Ground
j - Diagnostic Test Terminal
k - Malfunction Indicator Lamp
l - Ignition Feed
m - Battery Feed
n - Battery Feed
CIRCUIT DESCRIPTION:
When the Marine Diagnostic Trouble Code (MDTC) tool is installed, it plugs into the DLC
terminals “F” and “E”. It receives voltage through CKT 440 terminal “F” Terminal “E” is
s
ground through CKT 419 from the ECM terminal “J2-31”. There should always be a steady
MIL with the ignition “ON” and the engine stopped. The Engine Control Module (ECM) turns
the MIL“ON” by grounding the MIL driver circuit.
Index
90-861326--1
MARCH 1999
Page 5E-57
| 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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