STEP/SEQUENCE
RESULT
WHAT TO DO NEXT
TM 9-2320-363-20-1
Section 4
TROUBLESHOOTING CHARTS
E. FLASH CODE: 56
J1587 CODE:
5250 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 3-345.41 and you have now been referred here.
56-1
Check for Codes
Plug in DDR.
No Data Received
Go to C7-1.
Turn ignition on.
Code 250/12
Go to 56-2.
only.
Read codes.
Any other codes
Service other
present?
codes first.
56-2
Clear Codes
Clear codes.
CEL on
Replace ECM. Then
w/code 250/12.
go to 56-30.
Start and run engine
observe CEL/code.
No CEL/code.
Go to 56-30.
56-30
Verify Repairs
Turn ignition off.
Check engine light
Repairs are
comes on for 5 seconds
complete.
and goes out.
Turn ignition on
and observe check engine
Check engine light
All system
light.
comes on and stays
Diagnostics are
on.
complete.
Please review this section
to find the error.
Change 3 3-345.361
