CHECK ENGINE LIGHT (CEL) COMES ON AND STAYS ON.

TM 9-2320-364-20-1

2-13. DDEC II TROUBLESHOOTING (CONT).

A CHECK ENGINE LIGHT (CEL) COMES ON AND STAYS ON.

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

DDR test.

DDEC has detected a fault.

Are active and/or historical

codes displayed on DDR?

REASON FOR QUESTION

POSSIBLE PROBLEMS

Isolate Fault.

YES

If CEL is ON and stays ON, go to Fault A1 (Table 2-16).

If DDR display reads "NO DDEC DATA RECEIVED",

go to Fault A2 (Table 2-16).

If DDR display is blank or random, go to Fault A3 (Table 2-16).

If Active Codes are displayed, go to Fault Index (Table 2-16).

If no Active Code and Historical Code 51 are displayed,

go to Fault A4 Code 51 (Table 2-16).