CEL ERRATIC AND HISTORICAL CODES DISPLAYED ON DDR.

TM 9-2320-364-20-1

2-13. DDEC II TROUBLESHOOTING (CONT).

D1 CEL ERRATIC AND HISTORICAL CODES DISPLAYED ON DDR.

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)

Wheels chocked, (TM 9-2320-364-10)

References

TM 9-2320-364-10

START

KNOWN INFO

TEST OPTIONS

DDR test.

CHECK ENGINE light (CEL)

Does CEL stay OFF after

erratic and historical codes

running engine?

displayed on DDR.

REASON FOR QUESTION

POSSIBLE PROBLEMS

Running engine might make

historical codes active.

Read active codes

while CEL is ON,

go to Fault Index

YES

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