SERVICE PROCEDURE

23521R1
April, 2024

SUBJECT: EMISSIONS RECALL
J1939-84 Stationary Test DM21 Parameters related
to Periodic Smoke Inspection Program Scan (PSIP)
on certain International® HV", HX®, LT®, and RH™
Series trucks built 03/15/2017 thru 07/03/2022 with
2017 thru 2021 model year International® A26
engines.

CUSTOMER LETTER

Print ready (PDF file) copy of the Customer Letter
REASON FOR REVISION

Note removed prior to Step 7.

DEFECT DESCRIPTION

This emissions recall applies to series trucks that were built with 2017 thru 2021
model year International® A26 engines. Certain International® A26 engines may
not meet the regulatory requirements for J1939-84 Stationary Test DM21
Parameters related to Periodic Smoke Inspection Program Scan (PSIP). Under
certain conditions, this noncompliance may result in inaccuracies in on-board
diagnostics functionality and potentially issues with ongoing inspection and
maintenance programs.

MODELS INVOLVED

This emissions recall involves certain International® HV™, HX®, LT®, and RH™
series trucks built 03/15/2017 thru 07/03/2022 with 2017 thru 2021 model year
International® A26 engines.

ELIGIBILITY

This procedure applies ONLY to vehicles marked in the International® Service
PortalS™ with Emissions Recall 23521. Also complete any other open campaigns
listed on the Service Portal at this time.

VEHICLE RECALL 23521
© 2024 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 1

TOOLS REQUIRED

Description Tool Number
EZ-Tech® or equivalent N/A
Service Diagnostics Solutions (SDS) N/A
Battery Charger 55 Amp PSC550CC

Table 1 Tools Required
PARTS INFORMATION
There are no parts for this recall.

SERVICE PROCEDURE

WARNING! To prevent personal injury and / or death, or damage to
property, park vehicle on hard flat surface, turn the engine off, set the
parking brake and install wheel chocks to prevent the vehicle from moving
in either direction.

WARNING! To prevent personal injury and / or death, always wear safe eye
protection when performing vehicle maintenance.

WARNING! To prevent personal injury and /or death, or damage to
property, allow engine / vehicle components to cool before servicing.

WARNING! To prevent personal injury and / or death, or damage to
property, keep flames or sparks away from vehicle and do not smoke while
servicing the vehicle’s batteries. Batteries expel explosive gases. |

1. Park vehicle on a flat surface.
2. Shift the transmission to Park or Neutral and set the parking brake.
3. Turn vehicle ignition to Key OFF position.

4. Install wheel chocks.

5. Connect battery charger / maintainer to vehicle battery.

6. Connect to engine using Service Diagnostics Solutions (SDS).

VEHICLE RECALL 23521
© 2024 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 2

7. Extract / review health report.

a. ECM calibration recently updated via OTA; proceed to Step 11 and omit
performing Step 13 (customer will receive Proof of Correction certificate by
other means).

b. ECM calibration not current; proceed to Step 8.

8. Program ECM.

NOTE: The document listed in the table below contains general information
about each reprogramming method and software.

PROGRAMMING SOFTWARE

Programming Method Programming and Troubleshooting
Instructions
SDS Service Diagnostics Solutions User
Guide 4328790

Table 2 Programming Software

9. If assistance is needed, International® dealers should contact Vehicle
Programming by creating an iKNow case file. Customers should contact
Vehicle Programming by calling 1-800-336-4500, options 3, 4,1.

NOTE: Clear all inactive / previously active faults after programming. Only
perform diagnostics or procedures on ACTIVE faults.

10. If any inactive / previously active faults are found after programming, clear
them from ECM. Only perform diagnostics or procedures on active faults.

11. Disconnect battery charger / maintainer from vehicle battery.
12. Remove wheel chocks.
Additional Requirements for Dealers and Customers Operating in California

NOTE: The following step is required only for dealers and customers
operating in the state of California.

13. After completing this recall, dealer must fill out salmon-colored Proof of
Correction certificate and provide a copy to customer.

VEHICLE RECALL 23521
© 2024 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners. 3

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Figure 1. DMV Certificate, Salmon (Print on 8.5 x 11 inch White Paper).

END OF SERVICE PROCEDURE

LABOR INFORMATION

VEHICLE RECALL 23521

© 2024 Navistar, Inc. All rights reserved. All marks are trademarks of their respective owners.

Operation Number Description Time

A40-23521-1 Calibration current; programming not required 0.2 hrs

A40-23521-2 | Calibration not current; reprogram ECM 0.3 hrs
Table 3 Labor Information

ADMINISTRATIVE / DEALER RESPONSIBILITIES

WARRANTY CLAIMS

Warranty claim expense is to be charged to Warranty. Claims are to be
submitted in the normal manner, making reference to Emissions Recall 23521.

Section 7 of the Warranty Policy and Procedures Manual contains further
information related to the submission and processing of AFC / Recall claims.

As with all claim submissions, items acquired locally must be submitted in the
“Other Charges” tab. The cost of any bulk items (such as a bag of cable tie
straps, roll of wire, barrel of oil, or tube of silicone) should be prorated for the cost
of the individual pieces / amount used during each repair.

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