Heavy Duty Aftertreatment Failure Guide Worksheet – Replaces ATD Checklist – Freightliner

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Daimler Trucks North America
WARRANTY DEPARTMENT
6121 N Cutter Circle, Suite A
Portland, Oregon 97217-4090
WARRANTY INFORMATION LETTER
Verify latest version online; access Warranty Information Letters at DTNAConnect > Warranty Lit > Warranty Letters.
DISCLAIMER: The information contained in this letter supersedes and supplements any related policies and procedures in the Warranty Manual and/or
previously released letters. Failure to read or distribute this letter will not exempt addressees from compliance with the information contained herein.
Warranty Information Letter
No. : WI21-013
Revi sed: 5/4/21
Copyright © Daimler Trucks North America LLC. All rights reserved.
Daimler Trucks North America LLC is a Daimler company. 1 of 2
For questions, comments, or to submit an inquiry, go to:
DTNAConnect > My Applications > WSC
Please distribute to:
Dealer Principal, Warranty Manager, Service Manager, Parts Manager, Sales Manager

Freightliner Dealers

Direct Warranty Customers

Sales Terms (DTR)

Western Star Dealers

Export

Used Product (DTR)

FCCC Dealers

DDC Distributors

Travel Centers of America/Petro:Lube

Thomas Built Bus Dealers
WARRANTY INFORMATION LETTER
No.
WI21-013
Release
05/10/2021
Effective
05/10/2021
Subject
Heavy Duty Aftertreatment Failure Guide Worksheet – Replaces ATD Checklist
 Overview
 Using the HD ATS Failure Guide
 Filing Claims
 Accessing the Guide
This letter supersedes Warranty Information letter 18-021R about Detroit one box/diesel particulate filter (DPF) aftertreatment device (ATD) failure modes.
In the spirit of continuous improvement, the Warranty Department is aligning to the Heavy Duty Aftertreatment (HD ATS) Failure Guide (DDC-SVC-MAN-0208) and updating what information is necessary on claims for Detroit one box failures.
The HD ATS Failure Guide streamlines procedures for diagnosing the root cause of an ATS failure and determining the primary failed part (PFP). The guide is designed to lead a technician through diagnostic activities until a PFP is identified and includes five (5) possible checklists. Technicians will not complete the entire guide for each failure. While the technician is working through the guide, the results of each section are documented on the ATS Failure Guide Worksheet (located in Section 15 Appendix A > 15.1).
The ATS Failure Guide Worksheet is used to record all of the steps performed by the technician while completing the failure guide. The worksheet also lists applicable Standard Diagnostic Times (SDTs). Checklists and SDTs are below, see page 2 of this letter for samples of a checklist and the ATS Failure Guide Worksheet.
Checklist1
SDTs
Degraded Selective Catalytic Reduction (SCR) Checklist
246-046AE
Previous Failure Checklist
246-046BE
ATS Duty Cycle Checklist
246-046CE
Upstream Failure Checklist
246-046EE
DPF Maintenance Checklist
246-046DE
1 Keep on file, must be available upon request.
Note: The Detroit Tech Comm team retired the ATD Checklist. Though some legacy references remain in the service literature, the links direct users to the HD ATS Failure Guide, which replaces all other previously released documentation.
During claim creation, select the PFP based on the technician’s findings from using the HD ATS Failure Guide. Add the SDT associated with the completed checklist. Provide details about completed steps/results leading to PFP determination in the claim narrative or attach a copy of the ATS Failure Guide Worksheet to the claim.
Access the HD ATS Failure Guide through the Technical Literature portal on DTNAConnect.
Daimler Trucks North America
WARRANTY DEPARTMENT
6121 N Cutter Circle, Suite A
Portland, Oregon 97217-4090
WARRANTY INFORMATION LETTER
Verify latest version online; access Warranty Information Letters at DTNAConnect > Warranty Lit > Warranty Letters.
DISCLAIMER: The information contained in this letter supersedes and supplements any related policies and procedures in the Warranty Manual and/or
previously released letters. Failure to read or distribute this letter will not exempt addressees from compliance with the information contained herein.
Warranty Information Letter
No. : WI21-013
Revi sed: 5/4/21
Copyright © Daimler Trucks North America LLC. All rights reserved.
Daimler Trucks North America LLC is a Daimler company. 2 of 2
For questions, comments, or to submit an inquiry, go to:
DTNAConnect > My Applications > WSC
Samples: ATS Failure Guide Worksheet and Upstream Failure Checklist

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