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TM 9-2320-364-20-1
2-13. DDEC II TROUBLESHOOTING (CONT).
C NORMAL OPERATION OF CHECK ENGINE LIGHT (CEL) AND FAULT PRESENT.
INITIAL SETUP
Tools and Special Tools
Equipment Condition
Reader, Diagnostic (Item 53, Appendix G)
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
References
Wheels chocked, (TM 9-2320-364-10)
TM 9-2320-364-10
START
1.
KNOWN INFO
TEST OPTIONS
CHECK ENGINE light (CEL)
DDR test.
Are active and/or historical
comes ON for up to 5
codes displayed on DDR?
seconds, then goes OFF and a
REASON FOR QUESTION
Fault is present.
Isolate Fault.
POSSIBLE PROBLEMS
YES
If active codes are displayed, follow appropriate troubleshooting
chart for code displayed. Go to Fault Index (Table 2-16).
If historical codes are displayed, go to Fault C1.
If DDR display reads "NO DDEC DATA RECEIVED", go to Fault C2.
If DDR display is blank or random, go to Fault A3.
2-426

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