NORMAL OPERATION OF CHECK ENGINE LIGHT (CEL) AND FAULT PRESENT.

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

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.

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