Mercury MerCruiser MCM 454 Mag MPI Service Manual page 653

GENERAL SYSTEM DIAGNOSTICS
Chart A-1 (4 of 4): No Malfunction Indicator Lamp (MIL) - Marine Diagnostic
Trouble Code (MDTC) Tool Installed
Step
10
11
12
13
14
15
16
17
Index
Page 5E-60
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Action
Locate and repair open or short to
ground in CKT 440.
Is Action Complete?
Repair or replace faulty Marine
Diagnostic Trouble Code tool.
Is Action Complete?
1. Locate and repair faulty ECM
grounds.
2. If a problem is found, repair as
necessary.
Is Action Complete?
Locate and repair open in CKT
419.
Is Action Complete?
Locate and repair short to ground
in the battery feed circuit.
Is Action Complete?
Locate and repair open in the
circuit that did not light the test
light.
Is Action Complete?
Locate and repair short to ground
in CKT 439.
Is Action Complete?
Repair faulty ECM connections or
replace faulty ECM.
Is Action Complete?
SERVICE MANUAL NUMBER 23
Value(s) Yes
Go to OBD
System Check
_
Go to OBD
System Check
_
_
Go to OBD
System Check
Go to OBD
System Check
_
_
Go to OBD
System Check
_
Go to OBD
System Check
Go to OBD
System Check
_
Go to OBD
System Check
_
90-861326--1 MARCH 1999
No
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Go to Step 17
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