TSB170031-082320

Fault Code 6255 Present With No Other Fault Codes and Possible Diesel Exhaust Fluid (...
Page 1 of 2
Technical Service Bulletin
Technical Service Bulletin:
Released Date: 29-Aug-2017
TSB170031
Fault Code 6255 Present With No Other Fault Codes and Possible Diesel
Exhaust Fluid (DEF) Lamp Illumination
Fault Code 6255 Present With No Other Fault
Codes and Possible Diesel Exhaust Fluid
(DEF) Lamp Illumination
Warranty Statement
The information in this document has no effect on present warranty coverage or repair
practices, nor does it authorize TRP or Campaign actions.
Contents
Product Affected
•
•
•
•
•
•
•
•
B6.7 CM2350 B121B
ISB6.7 CM2350 B101
ISL9 CM2350 L101
ISX12 CM2350 X102
ISX15 CM2350 X101
L9 CM2350 L116B
X15 CM2350 X114B
X15 CM2350 X116B
Issue
Symptom:
• Only Fault Code 6255 present (active).
• Diesel exhaust fluid (DEF) lamp may be illuminated.
Root Cause:
• Engine control module (ECM) calibration code issue.
https://qsol.cummins.com/qs3/pubsys2/xml/en/tsb/2017/tsb170031.html
8/30/2017
Fault Code 6255 Present With No Other Fault Codes and Possible Diesel Exhaust Fluid (...
Page 2 of 2
Resolution
• Calibrate ECM using a January 2017, or later, INCAL™ DVD. Reference ECM
Calibration Revision History on QuickServe™ Online for more information.
• See corresponding Service Manual. Reference Procedure 019-032 in Section 19.
• If any fault codes other than Fault Code 6255 are active, troubleshoot fault codes
using corresponding troubleshooting tree.
• Run engine for two minutes after ECM calibration to allow DEF diagnostic to run.
Key OFF and key ON; DEF lamp should clear.
Document History
Date
Details
2017-3-17
Module Created
2017-8-23
Changed title; added: "Possible Diesel
Exhaust Fluid (DEF) Lamp Illumination".
Updated Symptom and Resolution
section.
Last Modified: 29-Aug-2017
https://qsol.cummins.com/qs3/pubsys2/xml/en/tsb/2017/tsb170031.html
8/30/2017