TSB210272-121020

Service Bulletin Details

Public Details for: TSB210272-121020

This technical service bulletin describes the process to re-enable fault code 6637 after an engine control module (ecm) calibration code update. This fault code was previously disabled.


- 9999 -

Models from 9999
9999 CUMMINS ISX12 
12/13/21, 3:08 PM
Fault Code 6637 After Engine Control Module (ECM) Calibration Code Update
Technical Service Bulletin
Technical Service Bulletin: TSB210272
Released Date: 10-Dec-2021
Fault Code 6637 After Engine Control Module (ECM) Calibration Code Update
Fault Code 6637 After Engine Control Module
(ECM) Calibration Code Update
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.
Information Only - OEM Related Matter Not Covered By Cummins® - Contact Appropriate OEM
Dealer or OEM Representative For Additional Information
Contents
Product Affected
ISX12N CM2380 X120B
Issue Summary
Fault Code 6637 was disabled from logging in previous engine control module (ECM) calibration
codes and can now log if there is an issue with the datalink variable speed fan.
Symptom:
Fault Code 6637 - Estimated Engine Parasitic Losses - Percent Torque - Data Erratic,
Intermittent, or Incorrect
Root Cause:
Fault Code 6637 was previously disabled
Verification
Verify Fault Code 6637 is active when engine is running.
Verify the installed ECM calibration code revision level is released on or after 18 November
2021.
Resolution
See equipment manufacturer service information for datalink variable speed fan related
troubleshooting.
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12/13/21, 3:08 PM
Fault Code 6637 After Engine Control Module (ECM) Calibration Code Update
Document History
Date
2021-12-10
Details
Module Created
Last Modified: 10-Dec-2021
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