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TECHNICAL SERVICE BULLETIN 23-2426
6.7L - Engine Coolant Temperature Gauge Reads High 19 December
Model:
Ford Engine: 6.7L Diesel
2023 F-Super Duty
Issue: Some 2023 F-Super Duty chassis cab vehicles equipped with a 6.7L engine may exhibit an engine coolant
temperature gauge reading at the high end of the normal range while towing in high ambient temperatures with no
diagnostic trouble codes (DTC) stored in the powertrain control module (PCM) or warning messages present in the
instrument panel cluster (IPC). This may be due to the software in the IPC. To correct the condition, follow the
Service Procedure to reprogram the IPC.
NOTE: The IPC software update that addresses the symptom listed in this bulletin may have been sent via
Ford Power-Up software updates delivered over-the-air (OTA) to connected vehicles that have automatic
updates enabled through the center display screen. Enter the vehicle identification number (VIN) in
Professional Technician System (PTS) and check the OTA Dashboard under the Connected Vehicle tab for
OTA update history. If an update to the IPC has successfully completed recently and the customer is
reporting the symptoms are no longer present, this article may not apply.
Action: Follow the Service Procedure to correct the condition on vehicles that meet all of the following criteria:
+ 2023 F-Super Duty chassis cab
* 6.7L diesel engine
+ Engine coolant temperature gauge reads at the high end of normal while towing
+ No DTCs or overheat warning messages present
Parts - Parts To Inspect And Replace As Necessary
Service Part Quantity |p ipti Unit of Piece
Number uantity |Description Issue Quantity
BXT-65-750 If Battery (750 Amp) - Refer To The Parts Catalog For The 1
Needed | VIN Specific Application
BAGM-65-A If Battery (750 Amp) - Refer To The Parts Catalog For The 1 41
Needed | VIN Specific Application
Quantity refers to the amount of the service part number required to repair the vehicle.
Unit of Issue refers to the number of individual pieces included in a service part number package.
Piece Quantity refers to the total number of individual pieces required to repair the vehicle.
If Needed indicates the part is not mandatory.
Warranty Status: Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Emissions Warranty/Service
Part Warranty (SPW)/Special Service Part (SSP)/Extended Service Plan (ESP) coverage. Limits/policies/prior
approvals are not altered by a TSB. NVLW/Emissions Warranty/SPW/SSP/ESP coverage limits are determined by
the identified causal part and verified using the OASIS part coverage tool.
Labor Times
anti. Operation .
Description N Time
lo.
2023 F-Super Duty 6.7L chassis cab: Reprogram The Appropriate Modules As Required By | MT232426 | Actual
The Software Update And Service Procedure (Do Not Use With Any Other Labor Time
Operations)
Repair/Claim Coding

Causal Part: 10849
Condition Code:

Service Procedure

NOTE: Ask the customer to bring their spare key fob to assist in the Ford Diagnosis and Repair System

(FDRS) programming. The time required to complete this procedure will vary depending on several factors

including the number of module software updates required, available internet bandwidth, universal serial

bus (USB) flash drive variability, and the potential that controller area network (CAN) flashing (software
update via the data link connector [DLC] with FDRS) may be required. It is recommended to connect to the
internet with an ethernet cable and use a USB 3.0/3.1 capable flash drive when performing software updates.

1. Start an FDRS session and navigate to Toolbox tab > Datalogger > body control module (BCM) and select the
BATT_SOC parameter identification (PID). Verify the PID reads 50% or higher. If state of charge (SOC) is less than
50%, charge the battery then navigate back to Toolbox tab > BCM > Reset Battery Monitor Sensor Learned Values
application. Perform the battery monitor sensor (BMS) reset.

(1). If the battery is unable to achieve a 50% SOC then a new battery may be required. Use the Rotunda GRX-
3590 or DCA-8000 testers to verify if replacement is required. If the battery is replaced, fully charge the new
battery. Then disconnect the Rotunda charger and perform a BMS reset using the FDRS scan tool.

2. Reconnect the battery charger and set it to maintain a vehicle voltage of 12.6 — 13.6 volts. A low battery state of
charge while performing a software update to any module may result in a repeat Restart Required message in the
vehicle's center display screen or a message on the FDRS saying Part Number Validation Failed or DID Validation
Failed.

3. Are there any updates available for the IPC, gateway module A (GWM), SYNC module (APIM), or telematic control
unit module (TCU)?

(1). Yes - proceed to Step 4.
(2). No - this article does not apply. Refer to Workshop Manual (WSM), Section 303-03.

4. Perform the Module Software Updating Procedures outlined below for the IPC, GWM, APIM, and TCU. Perform a
network test after each software update using the latest software level of the FDRS scan tool. This will refresh the
list of modules that have available software updates based current module software levels. Continue performing
software updates until all available software updates for those modules are complete. If any error conditions are
experienced during programming, refer to WSM Section 418-01A > General Procedures > Module Programming for
the Error Condition Table.

Module Software Updating Procedure

NOTE: Depending on the current software level of the modules, all the following updates may not be

required.

The following instructions apply when performing a software update on any of the following modules:

-IPC

- GWM
-APIM
- TCU

NOTE: If the next update is not showing available, perform a network test and recheck availability.

NOTE: A 32GB or larger universal serial bus (USB) flash drive is required for the GWM, TCU and APIM

software updates. USB 3.0 or higher is recommended for faster file transfer.

Make sure the USB flash drive being used is formatted correctly. To see the available drives, hold down the Windows

icon keyboard key and press the E keyboard key. Right click on the USB flash drive and select Properties. If File

System under the General tab is not exFAT, the drive must be formatted.

To format the USB flash drive:

+ Right click on the USB flash drive.

* Select Format, select exFAT for the File System.
* Select Default Allocation Size for the Allocation Unit Size.

De-selecting Quick Format is not necessary and results in a lengthier operation.

1. Using the FDRS, begin module programming by selecting the SW Updates tab. Follow all on-screen instructions
carefully. Perform the next available update.

2. When prompted, connect the USB flash drive to the FDRS.

3. When prompted by the FDRS, safely remove/eject the USB flash drive from the FDRS and connect it to the USB
media hub to install the software into the module. When the USB software update begins, the vehicle's center
display screen displays a message stating Do Not Remove USB. The update may take 10 minutes or longer to
complete.

NOTE: It may take up to 5 minutes for the vehicle to recognize the USB flash drive.

4. When the pop-up stating Restart Required appears on the center display screen:

(1). Turn the ignition off.
(2). Wait for 10 minutes.
(3). Restart the vehicle (key-on vehicle running). The update is still in progress at this time.

NOTE: It may take up to 5 minutes before the vehicle's center display screen displays Update Successful

pop-up. After 5 minutes if Update Successful pop-up is not shown on the vehicle's center display screen,

remove the USB and select yes on the FDRS Was the USB Update Successful prompt (FDRS verifies if the
module software update was successfully installed on the module).

5. Once the pop-up stating Update Successful appears in the vehicle's center display screen, select Close, remove
the USB flash drive from the USB media hub, and select Yes on FDRS indicating the update installed successfully.
This initiates the remaining automated configuration steps and reports the module software part numbers and
application software levels to the Ford online database. Failure to follow this step results in an inaccurate database
as well as omitted, improperly installed, or improperly configured applications (features) such as navigation (if
equipped). It is normal for the module to reset during this step.

© 2023 Ford Motor Company

All rights reserved.

NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge, tools, and

equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or provides information

that could assist in proper vehicle service. The procedures should not be performed by "do-it-yourselfers”. Do not assume that a condition
described affects your car or truck. Contact a Ford or Lincoln dealership to determine whether the Bulletin applies to your vehicle. Warranty Policy
and Extended Service Plan documentation determine Warranty and/or Extended Service Plan coverage unless stated otherwise in the TSB article.

The information in this Technical Service Bulletin (TSB) was current at the time of printing. Ford Motor Company reserves the right to supersede

this information with updates. The most recent information is available through Ford Motor Company's on-line technical resources.