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TM9-2320-360-20-3
Section 4
TROUBLESHOOTING CHARTS
E. FLASH CODE:
56
J1587 CODE:
S250 12 - J1587 DATA LINK FAULT
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, pg H-25 and you have now been referred here.
STEP/SEQUENCE
56-1
Check for Codes
l Plug in DDR.
l Turn ignition on.
l Read codes.
56-2
Clear Codes
l Clear codes.
l Start and run engine
(TM 9-2320-360-10) observe
CEL code.
56-30 Verify Repairs
l Turn ignition off.
l Turn ignition on
and observe “Check Engine”
light.
RESULT
WHAT TO DO NEXT
No Data Received.
Go to C 7-1.
Go to 56-2.
Service other
codes first.
w/code 250/12.
Replace ECM (para 7-29.1).
Then go to 56-30.
Go to 56-30.
“Check Engine” light
comes on for 5 seconds
and goes out.
Repairs are
complete.
“Check Engine” light
All system diagnostics are
comes on and stays
complete. Please review this
on.
section to find the error.
H-227
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