CODE 53 ELECTRICALLY ERASABLE PROGRAMMABLE READ-ONLY MEMORY (EEPROM) FAILURE AFFECTING CODE MEMORY.

TM 9-2320-364-20-1

2-13. DDEC II TROUBLESHOOTING (CONT).

A4 CODE 53 ELECTRICALLY ERASABLE PROGRAMMABLE READ-ONLY MEMORY

(EEPROM) FAILURE AFFECTING CODE MEMORY.

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.

CHECK ENGINE light (CEL)

Is Code 53 displayed on DDR

comes ON and stays ON.

after clearing?

REASON FOR QUESTION

POSSIBLE PROBLEMS

Code 53 indicates an error has

been detected in the EEPROM

DDEC ECM faulty.

inside the DDEC ECM which

affects the logging of trouble

codes.

Fault corrected.

YES

Replace DDEC ECM

(Para 7-56).