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TECHNICAL SERVICE BULLETIN 24-2135
Heated Seat Indicator Center Display Screen/Switch Mismatch Or Speed 10 May 2024
Assist Off Switch Greyed Out
Model:
Ford
2023 Expedition
Lincoln
2023 Navigator
Markets: North American markets only
Issue: Some 2023 Expedition/Navigator vehicles may experience a heated seat indicator center display
screen/switch mismatch (Navigator only) or speed assist off switch greyed out (Expedition only). This may be due to
the software in the APIM. To correct the condition, follow the Service Procedure to reprogram the APIM using the
latest level of the FDRS scan tool.
NOTE: The APIM software update that addresses the symptom listed in this article may have been delivered
via OTA software updates to connected vehicles that have automatic updates enabled through the center
display screen. Enter the VIN in PTS and check the OTA Dashboard under the Connected Vehicle tab for OTA
update history. If an update to the APIM has been 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 Expedition/Navigator
+ Heated seat indicator center display screen/switch mismatch - Navigator only
+ Speed assist Off Switch greyed out - Expedition only
Parts - Parts To Inspect And Replace Only If Necessary
Service Part A . .. | Number in ang
BAGM-48H6-760 | Only If Necessary (Up To | Only If Necessary (Up To Battery (760
1) 1) amp)
Claim Quantity refers to the total number of individual pieces required to repair the vehicle.
Package Order Quantity refers to the amount of the service part number package(s) required to repair the vehicle.
Number In Package refers to the number of individual pieces included in a service part number package.
Only If Necessary indicates the part is not mandatory.
Warranty Status: Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Service Part Warranty
(SPW)/Service Part New Vehicle (SPNV)/Extended Service Plan (ESP) coverage. Limits/policies/prior approvals are
not altered by a TSB. NVLW/SPW/SPNV/ESP coverage limits are determined by the identified causal part and
verified using the OASIS part coverage tool.
Labor Times
lo.
2023 Expedition/Navigator: Reprogram The Appropriate Modules As Required By The MT242135 | Actual
Software Update And Service Procedure (Do Not Use With Any Other Labor Operations) Time
Repair/Claim Coding
Causal Part: 14G371

Condition Code: jos |

Service Procedure

NOTE: The time required to complete this procedure varies depending on several factors including the

number of module software updates required, available internet bandwidth, USB flash drive variability, and

the potential that CAN flashing (software update via the DLC with FDRS) may be required. Connect to the
internet with an ethernet cable, use a USB 3.2 Gen 2 or higher flash drive. When performing USB software
updates, using high speed USB ports on the laptop is recommended for faster file transfer.

1. Start an EDRS session and navigate to Toolbox tab > Datalogger > BCM and select the BATT_SOC PID. Verify the
PID reads 50% or higher.

NOTE: Connecting the battery charger negative clamp directly to the battery negative terminal might result in

the SOC PID not immediately reflecting the improvement from charging.

(1). If SOC is less than 50%, charge the battery by attaching the battery charger's negative clamp to the engine or
chassis ground and not the negative battery terminal. Refer to WSM, Section 414-01.
(2). If the battery is unable to achieve a 50% SOG, use the Rotunda GRX-3590 or DCA-8000 testers to verify if
replacement is required.
+ If the battery does not need to be replaced, disconnect the Rotunda charger and perform a BMS reset using
the EDRS scan tool.
+ If the battery is replaced, fully charge the new battery, 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 GWM/ APIM/ TCU?

(1). Yes - proceed to Step 4.
(2). No - this article does not apply. Refer to WSM, Section 415-00.

4. Perform the Module Software Updating Procedures outlined below for the GWM, APIM and TCU. Performa
network test after each software update using the latest software level of the FDRS scan tool. This refreshes the
list of modules that have available software updates based current module software levels. Continue performing
software updates to the GWM 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

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

*ARIM

NOTE: A 32 GB or larger USB flash drive is required for GWM, APIM, and TCU software updates. USB 3.2 Gen

2 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