TROUBLESHOOTING CHARTS (Cont.) -726280605

TM 9-2320-364-20-1

Section IV. TROUBLESHOOTING CHARTS (Cont.)

FLASH CODE:

-- --

DDR DISPLAY:

CALIBRATION CHECKSUM INCORRECT

SAE J1587 CODE:

SID: 253 FMI: 2

Indicates that the engine calibration loaded in the ECM has been corrupted and is unable to operate. This diag-

nostic condition is typically:

The engine calibration programming operation failed to run to completion. Replace ECM (para 7-57).

FLASH CODE:

-- --

DDR DISPLAY:

FAILED EXTERNAL RAM

SAE J1587 CODE:

SID: 254 FMI: 0

Indicates that some or all of the memory circuitry that is external to the ECM microprocessor has failed and is

unable to operate. Replace ECM (para 7-57).

FLASH CODE:

-- --

DDR DISPLAY:

FAILED INTERNAL RAM

SAE J1587 CODE:

SID: 254 FMI: 1

Indicates that some or all of the memory circuitry that is internal to the ECM microprocessor has failed and is un-

able to operate. Replace ECM (para 7-57).

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