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Page Title:
DDR DISPLAY IS BLANK OR RANDOM. |
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 TM 9-2320-364-20-1
2-13. DDEC II TROUBLESHOOTING (CONT).
A3 DDR DISPLAY IS BLANK OR RANDOM.
INITIAL SETUP
Equipment Condition
Tools and Special Tools
Engine OFF, (TM 9-2320-364-10)
Tool Kit, General Mechanic's: Automotive
Parking brake applied, (TM 9-2320-364-10)
(Item 74, Appendix G)
Wheels chocked, (TM 9-2320-364-10)
STE/ICE-R (optional) (Item 3, Appendix G)
Top engine access cover opened,
DDEC Repair Kit (Item 15, Appendix G)
(TM 9-2320-364-10)
Multimeter (Item 44, Appendix G)
DDR disconnected from DDL connector MC13,
Reader, Diagnostic (Item 53, Appendix G)
Jumperwire
References
TM 9-2320-364-10
TM 9-4910-571-12&P
START
1.
KNOWN INFO
TEST OPTIONS
CHECK ENGINE light (CEL)
DDR test.
Is DDR fuse free of damage?
comes ON and stays ON.
REASON FOR QUESTION
POSSIBLE PROBLEMS
Defective DDR could be
problem.
DDR Faulty.
Open in +12 volt line.
Open in DDR or data link lines.
Short in DDR or data link lines.
Short in +12 volt line.
DDEC ECM connector
damaged.
Replace DDR fuse.
NO
Verify repair, go to
Step 7 of this Fault.
YES
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