55.3 TROUBLESHOOTING FLASH CODE 55
The following procedure will troubleshoot Flash Code 55.
Check J1939 Data Link
Perform the following steps to check for J1939 data link fault.
1. Is this a J1939 transmission/engine application?
[a] If yes, contact Detroit Diesel Technical Service.
[b] If no, use programming station and go to "update customer calibration"
and select transmission to manual, or correct transmission. Save changes.
Refer to section 55.3.2.
Perform the following steps to verify repairs.
1. Start engine.
2. Plug in DDR.
3. Read codes.
[a] If active code 231/12 is not logged, troubleshooting is complete.
[b] If active code 231/12 is logged, contact Detroit Diesel Technical Service. Check
DDR software level. Update DDR software if current level is 1.2.
All information subject to change without notice.
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