Service Bulletin

25-034

-

Version 1

July 30, 2025

K73 Telematics Control Module Software Updates #1
APPLIES TO
Year

Model

Trim Level

VIN Range

2024

ZDX

ALL

ALL

SYMPTOMS RESOLVED BY FIXES AND ENHANCEMENTS
•
•

Fixes issue where customers are not able to place an OnStar call.
Fixes issue where customers are not able to send remote commands using the AcuraLink application.

POSSIBLE CAUSE
The software within the telematics unit may need an update.
CORRECTIVE ACTION
Check the software code and, if needed, perform a software update for:
Controller Code: K73
Controller Name: Telematics Control Module
WARRANTY CLAIM INFORMATION
Operation
Number
0520A0
0525A5

Description
Inspect software - no update
Inspect K73 Telematics

Flat Rate
Time

Defect
Code

Symptom
Code

0.2 hr

Template
ID

Failed Part Number

A25034A
03265

85835908

03217

0.5 hr

A25054B

Software – update required
TOOL INFORMATION
Tool Name
Tool Number
Quantity
Multiple Diagnostic Interface 2 (MDI2)
07-EL-52100
1
Tech Line Connect (TLC) Software
N/A
N/A
Application Tool With Acura Diagnostic Package
DCA-8000 Dynamic Diagnostic Charging System
MTRDCA8000PA
1
NOTE: Make sure the latest version of the Tech Line Connect (TLC) Software Application Tool with Diagnostic Package is
installed on your computer

CLIENT INFORMATION:: The information in this bulletin is intended for use only by skilled technicians who have the
proper tools, equipment, and training to correctly and safely maintain your vehicle. These procedures should not be
attempted by “do-it-yourselfers,” and you should not assume this bulletin applies to your vehicle, or that your vehicle has
the condition described. To determine whether this information applies, contact an authorized Honda automobile dealer.
© 2025 American Honda Motor Co., Inc. – All Rights Reserved

28985

Page 1 of 6

INSPECTION PROCEDURE
The following steps are for inspection of the K73 Telematic Control Module to determine if an update is required.
1. Connect the MDI 2 to the PC and vehicle, then launch the Honda TechLine Connect (TLC) application from the desktop.
NOTE: Do not power on the vehicle at this time.
2. Use iN credentials to log in.
3. Select Launch TechLine Connect.
4. Select SPS2 from the side menu.
NOTE: SPS2 may automatically launch after selecting connect to vehicle.
5. Verify the VIN is displayed in the TLC drop down menu and matches the top center VIN window prior to using the
Service Programming System 2 (SPS2). If it does not match, type the VIN in the TLC window.
6. Type in Repair Order number under Job Card and select Next.
7. In SPS2 select Vehicle Software Status

NOTE: TLC will automatically compare the software installed on the vehicle against what is available on the server.

Page 2 of 6

8. Check the vehicle software status. Locate Component Code K73 with the Controller (ECU) Name Telematic Control
Module.
• If the Status column shows “Standalone Update Needed (SPS2)”, click Close to exit the Vehicle Software Status
and proceed to Programming Procedure below.
• If the Status column shows “Up-to-date”, an update is NOT needed. Submit warranty claim for inspection and
continue with normal troubleshooting.

PROGRAMMING PROCEDURE
The following steps are for vehicle preparation and programming the K73 Telematic Control Module.
NOTE: The programming procedure for K73 Telematic Control Module is different from other control modules.
1. Remove the negative terminal cover from the 12-volt battery.
2. Connect the DCA-8000 Dynamic Diagnostic Charging System, or current equivalent, to the 12-volt battery and set to
Reflash Mode.
3. Connect the MDI 2 to both the PC and the vehicle, then launch the Honda TechLine Connect (TLC) application from the
desktop.
NOTE: Do not power on the vehicle at this time.
4. Log in and launch TechLine Connect.
5. Select SPS2 from the side menu.
NOTE: SPS2 may automatically launch after selecting connect to vehicle.
6. Verify the VIN is displayed in the TLC drop down menu and matches VIN in the top center window prior to using the
Service Programming System 2 (SPS2). If it does not match, type the VIN in the TLC window
7. Type in Repair Order number under Job Card and select Next.

Page 3 of 6

8. Select Code K73 Telematic Control Module

9. Under Select Function Sequence ensure PREPARE FOR SOFTWARE UPDATE is selected and click next. This will
prepare the Telematic Control Module for the update process. This process can take approximately 2 minutes.

Page 4 of 6

10. Once PREPARE FOR SOFTWARE UPDATE is completed select SOFTWARE UPDATE and click NEXT to start the
reprogramming process.

11. Once SOFTWARE UPDATE is completed, proceed to Programming & Service Activation and click NEXT. The
Programming & Service Activation should take less than 1 minute.

Page 5 of 6

12. Ensure the Serial Data Authentication Configuration displays Complete.
13. Verify the Control Module updated successfully completed with SUCCESS status and document the Warranty Claim
Code on repair order.
14. When the update is complete, select New in the lower right corner of the screen.

15. Use GDS2 to clear any DTCs that may have set.
NOTE: If a problem occurs while reprogramming, refer to job aid Acura Updating Control Unit Modules with
TECHLINE CONNECT.

Page 6 of 6