S250 12 - J1587 DATA LINK FAULT

TM 9-2320-364-20-1

2-14. DDEC III/IV TROUBLESHOOTING (CONT).

Section IV. TROUBLESHOOTING CHARTS (Cont.)

E. FLASH CODE:

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/IV was started at step START-1, pg 2-539, and you have now been referred here.

STEP/SEQUENCE

RESULT

WHAT TO DO NEXT

56-1

Check for Codes

Plug in DDR.

No Data Received.

Go to C 7-1.

Turn ignition on.

Read codes.

Code 250/12

Go to 56-2.

only.

Any other codes

Service other

present?

codes first.

56-2

Clear Codes

Clear codes.

CEL on

Replace ECM (para 7-57).

Start and run engine

w/code 250/12.

Then go to 56-30.

(TM 9-2320-364-10) observe

CEL code.

No CEL code.

Go to 56-30.

56-30

Verify Repairs

Turn ignition off.

"Check Engine" light

Repairs are

Turn ignition on

comes on for 5 seconds

complete.

and observe "Check Engine"

and goes out.

light.

"Check Engine" light

All system diagnostics are

comes on and stays

complete. Please review this

on.

section to find the error.

2-729