Navistar International DT 466 Diagnostic/Troubleshooting Manual page 394

390 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
DTC 624 – Field default active
Condition:
Symptoms:
Possible Causes:
Actions:
DTC 631 – Read Only Memory (ROM) self-test fault
Condition:
Symptoms:
Possible Causes:
Actions:
DTC 632 – Random Access Memory (RAM) - CPU self-test fault
Condition:
Symptoms:
Possible Causes:
Actions:
DTC 655 – Programmable parameter list level incompatible
Condition:
Symptoms:
Possible Causes:
Actions:
DTC 661 – RAM programmable parameter list corrupt
Condition:
Symptoms:
Possible Causes:
Actions:
DTC 664 – Calibration level incompatible
Condition:
Symptoms:
Possible Causes:
Actions:
DTC 665 – Programmable parameter memory content corrupt
Condition:
Symptoms:
Possible Causes:
Actions:
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Field defaults active.
Low power (lowest rating in engine class) and vehicle features not functioning.
Programmable parameters for the ECM incorrectly programmed in module.
Program ECM
ROM self-test fault
No start.
Internal ECM problem.
Replace the ECM.
RAM Memory - CPU self-test fault.
No start.
Internal ECM problem.
Replace the ECM.
Programmable parameter list level incompatible.
No start or run in field defaults.
Programming problem or internal ECM problem.
Program ECM. May require ECM replacement.
RAM programmable parameter list corrupt.
No start or run in field defaults.
Internal ECM problem.
Program ECM. May require ECM replacement.
Calibration level incompatible.
No start or run in field defaults.
Programmable problem or internal ECM problem.
Program ECM
Programmable parameter memory content corrupt.
No start or run in field defaults.
Internal ECM problem.
Replace the ECM.
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
EGES-270-1