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 (Cont'd)
START-5
Read All Codes
Again
Read inactive codes
Any codes.
Follow appropriate diagnostic
on DDR
chart for codes received.
(See Table of Contents).
DDR display reads
Go to Chart 7, page 3-345.99.
"NO DATA BEING
RECEIVED FROM DATA
LINK” or "DDEC SYSTEM
NOT RESPONDING".
DDR display is
Go to START-9.
blank or random.
START-6
Read Codes on
the "Check
Engine" Light
Unplug the DDR.
Flashes out
To diagnose codes, follow
Ignition on.
codes.
appropriate diagnostic chart for
Engine not running.
codes received.
Depress and Hold.
To service DDR system, go to
Diagnostic Request Switch.
C7-4, page 3-345.101.
Read codes flashing out on the
"Check Engine" Light.
Does not flash
Go to Chart 9, page 3-345.111.
out codes.
START-7
Intermittent
Check Engine
Light
Note whether flashing "Check
Flashing a
Go to START-8 .
Engine" Light Is reading a valid
valid code.
code or if it's just erratic.
Erratic or
Go to Chart 1, page 3-345.57.
intermittent "Check
Engine" light.
Change 3 3-345.45
