Section 4
TM 9-2320-363-20-1
C. CEL l FIRST CHART FOR DIAGNOSIS OF DDEC II WHEN NO DDR IS AVAILABLE
NOTE:
Although this section will help you get started. later sections of the Troubleshooting Guide may require using a DDR
WARNING The engine and ignition should always be off before connecting or disconnecting
sensors or wiring harness. Failure to follow this warning could damage the ECM.
CEL-1 Note "Check Engine”
Light
l Turn ignition on while at the same
time observing the “Check
Engine” light.
CEL-2 Read Codes
. Install a jumper wire between pins
A and M of the 12 pin. DDL
connector or use the switch
for flashing out codes
(if installed).
CEL-3 Follow Codes
l Note and record code(s)
RESULT
WHAT TO DO NEXT
Go to CEL-2.
Go to CEL-2.
Go to Chart 4, page 3-164.
Go to CEL-8.
Go to CEL-3.
Go to chart 6, page 3-173.
Go to CEL-6.
Follow appropriate diagnostic
charts for the code(s) received.
(See Index on page 3-101).
Go to CEL-4.
If drive complaint persists, go to
Chart 1, page 3-136.
3-131
