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 TM 9-2320-364-20-1
2-13. DDEC II TROUBLESHOOTING (CONT).
A5B ENGINE HARNESS +5 VOLT SUPPLY.
INITIAL SETUP
Tools and Special Tools
Materials/Parts - Continued
Tool Kit, General Mechanic's: Automotive
Lockwasher (Item 168, Appendix F)
(Item 74, Appendix G)
Lockwasher (22) (Item 195, Appendix F)
STE/ICE-R (optional) (Item 3, Appendix G)
DDEC Repair Kit (Item 15, Appendix G)
References
Multimeter (Item 44, Appendix G)
TM 9-2320-364-10
Reader, Diagnostic (Item 53, Appendix G)
TM 9-4910-571-12&P
Remover, Connector (Item 55, Appendix G)
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
(Item 95, Appendix G)
Parking brake applied, (TM 9-2320-364-10)
Jumperwire
Wheels chocked, (TM 9-2320-364-10)
Top engine access cover opened,
Materials/Parts
(TM 9-2320-364-10)
Compound, Corrosion Preventive
Right front fender skirt removed, (Para 17-33)
(Item 34, Appendix C)
START
1.
KNOWN INFO
TEST OPTIONS
CHECK ENGINE light (CEL)
DDR TEST.
Is Code 46 (Low Battery
comes ON and stay ON.
Voltage) displayed on DDR?
REASON FOR QUESTION
POSSIBLE PROBLEMS
Low battery voltage is suspect.
4.7 to 5.2 vdc not supplied to
FTS or TBS.
4.7 to 5.2 vdc not supplied to
OPS or OTS.
Damaged DDEC ECM and
engine harness connectors.
Open in engine +5 volt line.
Short in engine +5 volt line.
Short to battery positive.
Go to Fault A4 Code
NO
YES
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