IK2600253 Service Bulletin/Repair Instructions

Countries:
AUSTRALIA, BAHAMAS, BOLIVIA, BRAZIL,

BELIZE, CANADA, CHILE, COLOMBIA, COSTA

RICA, DOMINICAN REPUBLIC, ECUADOR, EL

SALVADOR, GUATEMALA, GUYANA, HAITI,

Document

HONDURAS, JAMAICA, MEXICO, ARUBA, NEW

IK2600253

ID:

ZEALAND, NICARAGUA, PANAMA, PERU,

PUERTO RICO, RUSSIA, SOUTH AFRICA,

TRINIDAD AND TOBAGO, UNITED STATES,

URUGUAY, VENEZUELA, Curaçao
Availability:

Major

System:

Current

Language:

Other

Languages:
ISIS, IsSIR
Revision: 16
PROGRAMMING SUPPORT
Created:
English
Last

12/9/2025

Modified:
NONE
Author:
Viewed:
8553
6/1/2021
Matthew

Carrigan

Less Info
Coding Information
Hide Details
Copy Link
Copy Relative Link
Bookmark
Add to Favorites
Print
Provide Feedback
View My Bookmarks
Helpful
Not Helpful
14
0
Title : Programming Instructions for A26a Engine Swaps

Applies To : A26a (2017-2021 A26) Engine Swaps (both NEU and new)
CHANGE LOG

Please refer to the change log text box below for recent changes to this article:

12/09/2025 - Added info about reman engines

9/12/2025 - Changed "A26" to "A26a" and added "2017-2021"

09/09/2025 - Added additional screenshot description

08/29/2025 - Changed process to reflect using SDS

07/09/2025 - Fixed broken iKnow Link


DESCRIPTION

This document guides dealer technicians through the programming process for an A26a (2017-2021) engine swap (both NEU

and new engines).
PROCESS UPDATES

This programming process has been rewritten because all A26a programming is now done through SDS (not NavKal).

A26a engine swap case files should be submitted to the Powertrain group. The Vehicle Programming group can assist up

on request from the dealer or Powertrain team.

Normal A26a ESNs start with 124KM2Y. Reman A26a ESNs currently start with an "S". Do not update your ECM

programming with reman ESNs as it will break the programming process.
PROGRAMMING STEPs
1.
Connect SDS to the old ECM on

the old engine. Completing this

step captures the parameters

from the old ECM and will ensure

you get the exact same

programming into the new ECM.

Connecting is all that is needed.
1.
2.
3.
2.
3.
Connect SDS to the new ECM.

1. Menu

2. Select Connection menu.

If no connection has been

selected previously, this

menu item will show "No

Connection".

3. Select Nexiq USB-Link 2

USB or Nexiq USB-Link 3

USB. Only use a USB

connection for

Programming. Do not

program via a wireless or

bluetooth connection.

Begin Programming Process

1. Menu

2. Programming

3. A26A Blank Flash
1.
2.
1.
2.
Visual of programming screen

(click on picture to see full size pic)
4.
1. Instructions

2. Data entry: VIN, Select

Config Date,

Miles/Hours/Fuel

3. Programming Button
5.
Enter VIN in "VIN" field, and wait

for "Configuration" field to

populate with a drop down menu

full of options.
6.
Per the SDS programming

instructions (shown in step 4

screenshot), select a point in time

when this module was working.

In most cases, it would be the

date representing the connection

to the previous module on the

previous engine.
1.
7.
Program:

1. Once all fields are

populated with the correct

info,

2. Click "Program" button

2.
3.
3.
8.
9.
Getting Template:

1. Download Template: "Not

In 20504 SDS Template"

2. Unzip Template: There

are various ways to unzip a

file.

a. Start by right

clicking on the

downloaded file,

b. then select an

option that provides

unzip functionality.

The screenshot to the

right shows 2 of the

options you might

see. (Some of the

other options are:

"Winzip", "Extract",

2.

"Extract To Here", or

possibly other

options.)

c. If you need

assistance with this

step, you can:

1. work with a

coworker

2. work with

your service

manager/advisor

3. or, submit a

case file to the

EZ Tech support

team (click here

for Case File

Opening Best

Practices)

Loading "Not in 20504 SDS

Template" into SDS

1. Menu

1

2. Load a Template

3a. Select unzipped

template file

3b. SDS cannot use zipped

files. After downloading,

3a

you must unzip the

template file. See step 8

(above) for details.

4. Programming Screen

a. check box "Show

3b

Edited Parameters

Only" (bottom of

screenshot)

b. large red box

shows parameters

contained in template,

and their values

c. click "Program"

button

note: screenshot 4

shows 3 parameters

colored in white and 2

parameters colored in

yellow. Yellow

parameters are only

available to users that

have engineering

access. Dealer
2
technicians will not

see those parameters

or their values when

logged into SDS. As

long as the white

parameters from

screenshot 4 show

correctly in your SDS,

you can trust that the

other 2 that you

cannot see are also

correct.
Change ESN: (Normal A26a ESNs

start with 124KM2Y. Reman A26a ESNs

currently start with an "S". Do not

update your ECM programming with

reman ESNs as it will break the

programming process.)
4
1
1. Menu

2. Programming

3. All Parameters

4

4. Programming Screen

A. Search for "ESN"

B. Enter new ESN

C. Click "Program"

button

Change IQAs - there are 2

different processes depending on

the type of A26a engine being

installed (NEU vs new):

1

1. NEU (New Exchange

Unit) engine. This type of

engine has an "R" in the

ESN (ie

124KM2R1234567): get

IQAs from paper provided

with engine.

11.

2. New engine. This type of

engine has a "Y" in the ESN

4

(ie 124KM2Y1234567): get

IQAs from Vehicle

Programming Group via

case file.

3. Reman engine. This type

of engine has an ESN that

begins with an "S". Get

IQAs from the injectors.
2
3
10.
12. Click "Program" button
2
3
Check to see if the miles in the

cluster odometer are accurate

(they might have doubled). If

miles are not accurate, use DLB

to update the body controller and

13.

cluster to the latest software

version. Then use DLB to "set

odometer". You can find that

option in DLB under the "Tools"

menu.
OTHER RESOURCES

Master Service Information Site

RC2600001 - Vehicle Programming Resource Center

Hide Details
Feedback Information

Viewed:
8552
Helpful:
14
Not Helpful: 0

No Feedback Found
Copyright © 2026 Navistar, Inc.

Bestseller No. 1

ANCEL AD310 Classic Enhanced Universal OBD II Scanner Car Engine Fault Code Reader CAN Diagnostic Scan Tool, Read and Clear Error Codes for 1996 or Newer OBD2 Protocol Vehicle (Black)

CEL Doctor: The ANCEL AD310 is one of the best-selling OBD II scanners on the market and is recommended by Scotty Kilmer, a YouTuber and auto mechanic. It can easily determine the cause of the check engine light coming on. After repairing the vehicle's problems, it can quickly read and clear diagnostic trouble codes of emission system, read live data & hard memory data, view freeze frame, I/M monitor readiness and collect vehicle information.
Sturdy and Compact: Equipped with a 2.5 foot cable made of very thick, flexible insulation. It is important to have a sturdy scanner as it can easily fall to the ground when working in a car. The AD310 OBD2 scanner is a well-constructed mechanic tool with a sleek design. It weighs 12 ounces and measures 8.9 x 6.9 x 1.4 inches. Thanks to its compact design and light weight, transporting the device is not a problem. The buttons are clearly labelled and the screen is large and displays results clearly.
Accurate Fast and Easy to Use: The AD310 scanner can help you or your mechanic understand if your car is in good condition, provides exceptionally accurate and fast results, reads and clears engine trouble emission codes in seconds after you fixed the problem. This device will let you know immediately and fix the problem right away without any car knowledge. No need for batteries or a charger, get power directly from the OBDII Data Link Connector in your vehicle.
OBDII Protocols and Car Compatibility: Many cheap scan tools do not really support all OBD2 protocols. AD310 scanner as it can support all OBDII protocols such as KWP2000, J1850 VPW, ISO9141, J1850 PWM and CAN. This device also has extensive vehicle compatibility with 1996 US-based, 2000 EU-based and Asian cars, light trucks, SUVs, as well as newer OBD2 and CAN vehicles both domestic and foreign. Pls confirm with our customer service whether it is compatible with your vehicle before purchasing.
Home Necessity and Worthy to Own: This is an excellent code reader to travel or home with as it weighs less and it is compact in design. You can easily slide it in your backpack as you head to the garage, or put it on the dashboard, this will be a great fit for you. The AD310 is not only portable, but also accurate and fast in performance. Moreover, it covers various car brands and is suitable for people who just need a code reader to check their car.

Bestseller No. 2

MOTOPOWER MP69033 Car OBD2 Scanner Code Reader Engine Fault Scanner CAN Diagnostic Scan Tool for All OBD II Protocol Cars Since 1996, Yellow

Multi-Functions - Practical Multi-Functions OBD2 code reader features built-in OBD2 DTC lookup library, which help you to determine the cause of the engine light, read code, erase code, view freeze frame, I/M ready, vehicle information, data flow, real-time curve, get vehicle speed information, calculate load value, engine coolant temperature, get engine speed.
Wide Capability - Supports 9 protocols compatible with most 1996 US-Based, 2000 EU-Based and Asian cars, and newer OBD II & CAN domestic or import vehicles. Supports 6 languages - English,German, Dutch, Spanish, French, Italian.
2.8" LCD Display - Designed with a clear display 2.8" Large LCD screen - white backlight and contrast adjustment. No need any battery or charger, OBD reader gets the power directly from your vehicle through the OBDII Data Link Connector.
Compact Design - Car diagnostic scanner is equipped with a 2.5 feet long cable and made of a very thick flexible insulator.There are 6 buttons on OBD2 Scanner:scroll up/down,enter/exit and buttons that quick query VIN vehicle number& the DTC fault code.
ABS / Airbag codes NOT Supported - It is able to read and clear check engine information which is part of OBDII system, but it cannot work with non-OBDII systems, including ABS / Airbag / Oil Service Light, etc.

Bestseller No. 3

FOXWELL NT301 OBD2 Scanner Live Data Professional Mechanic OBDII Diagnostic Code Reader Tool for Check Engine Light

【Your Personal CEL Doctor – Read & Clear Engine Codes】The NT301 OBD2 scanner lets you read diagnostic trouble codes (DTCs), check em-issions readiness, turn off your Check Engine Light (CEL) or MIL, reset monitors, and view live data streams. It retrieves your vehicle's VIN instantly. Like all standard OBD2 scanners, it clears codes only after repairs are completed—if the issue persists, the code will return. Designed for DIYers who want to understand what’s really going on under the hood.
【Easy Code Reading – Just Plug & Play】Simply plug into the OBD2 port, turn the ignition to “ON” (engine off), and select the correct menu: Select OBDII-> Wait for seconds-> Select Read codes. For accurate results, ensure your vehicle is compatible and the OBD2 port is free from damage or wiring issues. No batteries needed— powered directly by your car.
【Live Data Graphing & Accuracy for Most OBD2 Vehicles】View and log live sensor data in graph form—monitor oxygen sensors, fuel trims, coolant temp, RPM, and more. Spot trends and suspicious values in real time. Compatible with most 1996+ gasoline cars, light trucks, and SUVs sold in the U.S., as well as many 2000+ European and Asian models. Also works on 12V diesel vehicles equipped with OBD2.
【S-mog Check Helper – Know Your Readiness Status at a Glance】With dedicated I/M readiness hotkeys and a simple Red-Yellow-Green LED indicator, you’ll instantly know if your vehicle is ready for em-issions testing. Built-in speaker provides audio feedback. No guesswork—just confidence before you head to the test center.
【A Must-Have Tool for Every Home Mechanic】Compact, rugged, and ready to use right out of the box. The 2.8” color screen is easy to read, even in daylight. No charging or setup required—just plug into the 16-pin DLC and start diagnosing. Recommended by professional mechanics on YouTube and trusted by DIYers worldwide.

Last update on 2026-03-26 / Affiliate links / Images from Amazon Product Advertising API

This product presentation was made with AAWP plugin.

Buffer Copy Email Facebook Flipboard Hacker News LinkedIn Messenger Mix Pinterest Print Reddit SMS Telegram Tumblr X VK WhatsApp Line Xing Threads