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Page Title:
CHECK ENGINE LIGHT (CEL) ALWAYS OFF. |
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 TM 9-2320-364-20-1
2-13. DDEC II TROUBLESHOOTING (CONT).
B CHECK ENGINE LIGHT (CEL) ALWAYS OFF.
INITIAL SETUP
Tools and Special Tools
Equipment Condition
Tool Kit, General Mechanic's: Automotive
Engine OFF, (TM 9-2320-364-10)
(Item 74, Appendix G)
Parking brake applied, (TM 9-2320-364-10)
STE/ICE-R (optional) (Item 3, Appendix G)
Wheels chocked, (TM 9-2320-364-10)
DDEC Repair Kit (Item 15, Appendix G)
Top engine access cover opened,
Multimeter (Item 44, Appendix G)
(TM 9-2320-364-10)
Reader, Diagnostic (Item 53, Appendix G)
Remover, Connector (Item 55, Appendix G)
Jumperwire
References
TM 9-2320-364-10
TM 9-4910-571-12&P
START
1.
TEST OPTIONS
KNOWN INFO
CAUTION
Read CAUTION
CHECK ENGINE light (CEL)
Visual inspection.
on Page 2-415
does not illuminate.
REASON FOR QUESTION
POSSIBLE PROBLEMS
Is DDEC ECM vehicle harness
If connector is not seated
Loose or unseated DDEC ECM
connector MC18 connected
correctly, CEL will not operate.
vehicle harness connector.
and seated correctly?
Short in +12 volt wire 439.
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.
Remove and reinstall
Damaged DDEC ECM terminals
connector correctly.
or connectors.
NO
Verify repair, go to
Step 9 of this Fault.
YES
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