NHTSA ID Number: 10169297
Manufacturer Communication Number: TSB190202-112520
TSB/Document Date: 2019-12-16
Summary
This Technical Service Bulletin describes the verification and resolution of incorrectly replaced aftertreatment diesel exhaust fluid (DEF) dosing units. Multiple "trouble not found" aftertreatment DEF dosing units have been returned from the field due to being replaced while troubleshooting Fault Codes 3558 and/or 3559. 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.
12/3/2019
Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Unit with Fault Codes 3558 and 3559
Technical Service Bulletin
Technical Service Bulletin: TSB190202
Released Date: 25-Nov-2019
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
L9
CM2350 L116B
X12 CM2350 X119B
X15 CM2350 X114B
X15 CM2350 X116B
Issue
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.
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12/3/2019
Aftertreatment Diesel Exhaust Fluid (DEF) Dosing Unit with Fault Codes 3558 and 3559
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
Date
2019-11-21
Details
Module Created
Last Modified: 25-Nov-2019
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TSB/Document ID: TSB190202-112520
Replacement Service Bulletin Number:
MFR Communication Date: 2019-11-25
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL SYSTEM, DIESEL
MFR Component System:
MFR Component Subsystem:
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