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Page Title:
CHECK ENGINE LIGHT (CEL) ALWAYS OFF (CONT). |
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 TM 9-2320-364-20-1
B CHECK ENGINE LIGHT (CEL) ALWAYS OFF (CONT).
2.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
CHECK ENGINE light (CEL)
Visual inspection.
on Page 2-417
does not illuminate.
DDEC ECM vehicle harness
REASON FOR QUESTION
connector OK.
Is CEL off with jumperwire
Isolate Fault.
installed at wire 419 on
POSSIBLE PROBLEMS
vehicle harness connector
MC18, terminal B1 and a
Short in +12 volt wire 439.
known good ground?
CEL indicator lamp faulty.
Open in CEL driver wire 419.
Open in +12 volt wire 439.
Short/Open in battery positive
wires 240 or 241.
Open in ground wire 150.
Go to Step 5 of this
Damaged DDEC ECM terminals
NO
Fault.
or connectors.
YES
2-416
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