TM 1284025223
G55 FAULT CODES 101F, INTERNAL DECU FAULTS EXPANDED INSTRUCTIONS
With power to DECU and before starting engine, if code "10" or "10 and 1F" are displayed, refer
For all other faults or combinations, refer to numbered steps in figure 141.
These codes indicate internal DECU problems. No further troubleshooting is possible.
Y
Y
HAS CONTROL
IS ONLY CODE "10"
MOVE PRIM/REV SWITCH
SWITCHED TO
DISPLAYED?
TO REVERSIONARY POSI-
REVERSIONARY?
TION FOR 12 SECONDS.
RETURN TO PRIMARY
N
N
REMOVE AND
REPLACE DECU
Y
MOVE ECL TO
VIEW DISPLAY. ARE
ARE ONLY CODES "10"
GROUND POSIION
"10" AND "1F"
AND "1F" DISPLAYED?
(30 DEGREES)
CLEARED?
N
N
Y
REMOVE AND
PROCEED WITH
CLEAR ALL FAULTS EXCEPT
REPLACE DECU
ENGINE START
"10" AND/OR "1F"
Figure 141a. Procedure to Clear Fault code "10" and/or "1F" Before Engine Start
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