TSB190165-060920

6/18/2020
FC1866, FC3361, FC3382, FC3383, FC3389, and/or FC4729: Soot Deposits in the Intake Air Connection
Technical Service Bulletin
Technical Service Bulletin: TSB190165
Released Date: 09-Jun-2020
FC1866, FC3361, FC3382, FC3383, FC3389, and/or FC4729: Soot Deposits in the
Intake Air Connection
FC1866, FC3361, FC3382, FC3383, FC3389,
and/or FC4729: Soot Deposits in the Intake Air
Connection
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
L9 CM2350 L116B
L9 CM2350 L123B
Issue
Symptom:
Active or multiple inactive counts of FC1866, FC3361, FC3382, FC3383, FC3389, and/or
FC4729.
Root Cause:
Soot deposits in the intake air connection exhaust gas entrance ports are present and have
affected EGR flow measurements.
Soot deposits in the intake air connection exhaust gas recirculation (EGR) differential pressure
horizontal and vertical ports are present and have affected EGR flow measurements.
Verification
Active or multiple inactive counts of FC1866, FC3361, FC3382, FC3383, FC3389, and/or
FC4729.
Resolution
For B6.7 CM2350 B121B, if ECM calibration code revision on unit was released prior to
December 2018, calibrate the unit with the latest ECM calibration code revision. See B6.7
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6/18/2020
FC1866, FC3361, FC3382, FC3383, FC3389, and/or FC4729: Soot Deposits in the Intake Air Connection
CM2350 B121B Service Manual, Bulletin 5411223. Refer to Procedure 019-032
(/qs3/pubsys2/xml/en/procedures/105/105-019-032.html) in Section 19.
Thoroughly clean the intake air connection exhaust gas entrance ports and exhaust gas
recirculation (EGR) differential pressure horizontal and vertical ports. See Service Bulletin,
Exhaust Gas Recirculation (EGR) System Intake Air Connection Inspection and Cleaning
Guidelines, Bulletin 5579934. (/qs3/pubsys2/xml/en/bulletin/5579934.html).
Inspect the EGR differential pressure sensor. See corresponding Service Manual. Refer to
Procedure 019-370 in Section 19.
If the EGR differential pressure sensor meets specifications according to published
troubleshooting, do not replace the EGR differential pressure sensor. Verify the EGR
differential pressure sensor is properly oriented and placed as removed when installed
on the intake air connection.
Follow the “Conditions For Clearing The Fault Code” section in corresponding fault code
overview to validate the repair.
Verify fault code is no longer active. If fault code is still active, reference the
corresponding fault code troubleshooting tree.
Document History
Date
Details
2019-9-20
Module Created
2020-6-1
Updated title, product affected, issue, verification, and resolution
sections.
Last Modified: 09-Jun-2020
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