TSB190202

7/6/2021
Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Unit with Fault Codes 3558 and 3559
Technical Service Bulletin
Technical Service Bulletin: TSB190202
Released Date: 29-Jun-2021
Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Unit with Fault Codes 3558 and 3559
Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Unit with Fault
Codes 3558 and 3559
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
B6.7 CM2450 B155B
L9 CM2350 L116B
L9 CM2450 L126B
X12 CM2350 X119B
X12 CM2450 X137B
X15 CM2350 X114B
X15 CM2350 X116B
X15 CM2450 X124B
X15 CM2450 X134B
Issue
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7/6/2021
Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Unit with Fault Codes 3558 and 3559
Multiple trouble not found aftertreatment DEF dosing unit have been returned from the field due to being replaced while
troubleshooting Fault Codes 3558 and/or 3559.
Symptom:
Active Fault Codes 3558 and/or 3559 present.
Aftertreatment diesel exhaust fluid (DEF) dosing unit may appear to be non-functional
Root Cause:
Neither a good or malfunctioning aftertreatment DEF dosing unit can cause Fault Codes 3558 or 3559 to come active as these
fault codes are isolated within the OEM wiring harness.
An electrical short or open circuit has been detected in the DEF dosing unit OEM wiring harness.
Verification
Active Fault Codes 3558 and/or 3559 present.
Aftertreatment DEF dosing unit may appear to be non-functional.
Resolution
Follow appropriate troubleshooting steps as outlines in the corresponding fault code Troubleshooting trees and/or EDS.
Review OEM service information for documentation related to Fault Codes 3558 and/or 3559.
Service Instructions
Connect with INSITE™ electronic service tool and check for active fault codes.
If Fault Codes 5865 or 5867 are present, troubleshoot these fault codes before troubleshooting Fault Codes 3558 or 3559.
If Fault Codes 3558 and/or 3559 are the only active fault codes, do not replace aftertreatment DEF dosing unit. Follow
corresponding troubleshooting documentation.
Check OEM aftertreatment DEF dosing unit relay wiring harness for chaffed wires, damaged/exposed wires, and/or damaged
pins.
Check OEM aftertreatment DEF dosing unit relay for proper operation.
Check OEM wire between the aftertreatment DEF dosing unit and ECM pin 79 for chaffed wires, damaged/exposed wires,
and/or damaged pins.
Review OEM service information for documentation related to Fault Codes 3558 and/or 3559.
Document History
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7/6/2021
Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Unit with Fault Codes 3558 and 3559
Date
Details
2019-11-21
Module Created
2021-6-11
Updated Product Affected section.
Last Modified: 29-Jun-2021
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