TM-9-2320-272-23-2
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-2 - Page 60 of 1417
DIAGNOSTIC FAULT COTES - Continued
Table
1.
Diagnostic Fault Codes - Continued
E0-E9
EA-EF
93, 99
Defective ECU
Defective ECU
Defective ECU
Replace ECU and retest
Blank
Hi, Lo
No power to diagnostic unit
Low power or communication issue
Faulty power supply, open or short in
communication line
No power to line 10 mixed, hardware
EXPLANATION OF TROUBLESHOOTING PROCEDURES
Troubleshooting procedures are defined as follows:
1.
STEP
: An action or process taken to isolate cause of fault.
2.
CONDITION/INDICATION
: States possible fault that may cause the symptom.
3.
DECISION
: Action required to move forward with next step or correct the fault.
END OF WORK PACKAGE
TM 9-2320-272-23-2
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