STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
D. CHART -1 · INTERMITIENT CODE OR A SYMPTOM AND NO CODES
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, page 3-345.41 and you have now been referred here.
C 1-1
Diagnosis by Symptom
Turn ignition off.
Intermittent
Go to Chart 1, page 3-345.57.
Go to appropriate result in the
code.
next column based on engine
symptom.
Engine cranks
Go to Chart 2, page 3-345.63.
but will not start.
Erratic performance
Go to Chart 3, page 3-345.83.
and No codes.
No Check Engine
Go to Chart 4, page 3-345.85.
Light during bulb
check.
Check Engine
Go to Chart 5, page 3-345.91.
Light always on and
No Codes.
Stop Engine
Go to Chart 6, page 3-345.95.
Light always on,
and No codes.
No data to
Go to Chart 7, page 3-345.99.
DDR
No Stop Engine
Go to Chart 8, page 3-345.105.
Light during Bulb Check.
Diagnostic Request
Go to Chart 9, page 3-345.111.
Switch Inoperative.
Stop Engine
Go to Chart 10, page 3-345.115.
Override Inoperative.
Variable Speed
Go to Chart 11, page 3-345.117.
Governor (PTO)
Inoperative.
Cruise Control
Go to Chart 12, page 3-345.127.
Inoperative.
Cruise Active
Go to Chart 13, page 3-345.141.
Light always on.
(if supplied)
Cruise Active
Go to Chart 14, page 3-345.145.
Light is never on.
(if supplied)
Change 3 3-345.57
