STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
D. CHART 22 · THROTTLE INHIBIT ALWAYS ON
NOTE - This chart is only to be used if:
1) All basic mechanical checks and physical inspections have been performed with no problem found,
and
2) Diagnosis of DDEC-III was started at step Start-1, pg 3-345.41 and you have now been referred here.
C 22-1
Check Configuration
Turn ignition on.
Throttle inhibit not
Problem is not related
Plug in DDR. to throttle
assigned.
inhibit. Go to C 1-2.
Review ECM in/outs for
for wire assigned to "throttle
Data obtained
Go to C 22-2.
inhibit".
C 22-2
Switch Status
Select switch/light status.
ON.
The wire that is assigned to
Status of throttle inhibit.
the throttle inhibit function is
shorted to ground. Repair
short, then go to C 22-30.
OFF.
Problem is not with throttle
inhibit, or is intermittent. See
C1-2 for intermittent problem.
C 22-30
Verify Repairs
Start engine.
Throttles ok.
Repairs complete. Return to
Attempt to throttle engine using
service.
foot pedal.
No throttle.
Review this section or go to
START-1, pg 3-345.41, as
problem may not be related to
throttle inhibit.
Change 3 3-345.163
