page 3-101
page 3-141
Section 4
TROUBLESHOOTING CHARTS
C. START - FIRST CHART FOR DIAGNOSIS OF DDEC-II USING DDR (Centd.)
STEP/SEQUENCE
START-3 Read All Codes
Usinq DDR
Plug DDR into the 12 pin
DDL connector.
Read all historical codes by
selecting MODE 02 (HISTORICAL
CODES) on the DDR.
START-4 Attempt to Make
Codes Active
clear codes by selecting MODE
40 (CODE ERASE) on the DDR.
Attempt to start and run the engine.
Try to get the Check Engine light
on by:
- warming up the engine
- slowly changing the RPM from
idle to no load speed.
Run engine for 1 minute or until
"Check Engine" light comes on.
TM 9-2320-363-20-1
RESULT
WHAT TO DO NEXT
Go to Chart 1, page 3-136.
Go to Chart 7, page 3-177.
Go to START-9.
Read Active Codes (MODE 01
on DDR) while light is on and
follow appropriate diagnostic
chart (See Index on page 3-101).
Go to Start-5.
3-123