STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
C. START - FIRST CHART FOR DIAGNOSIS OF DDEC-III USING DDR
START 1
NOTE "Check
Engine" Light
· Turn ignition on while at the same
Light or lights
Go to START-2.
time observing the "Check/Stop
comes on and stays on.
Engine" light (engine not running)
Lights come
Go to START-3.
on for up to 5 seconds,
then goes out.
Lights are off.
Go to Chart 4, page 3-345.85.
Erratic or
Go to START-7.
intermittent light.
START-2
Read Active
codes Using
DDR
Plug DDR into the
Active codes
Follow appropriate diagnostic
DDL connector.
(other than "NO CODES")
charts for code(s) received.
on DDR.
(See Index).
Read active codes by selecting the
DIAGNOSTIC CODE MENU
(ACTIVE CODES) on the DDR.
No active code.
Go to Chart 5, page 3-345.91,
DDR display reads
Go to START-6 .
"NO DATA BEING
RECEIVED FROM DATA
LINK” OF "DDEC SYSTEM
NOT RESPONDING".
DDR display is,
Go to START-9.
blank or random.
Change 3 3-345.41
