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TECHNICAL SERVICE BULLETIN 23-2257
IIluminated MIL And/Or Powertrain Malfunction (Wrench) Indicator With Various DTCs - Built On Or — 2" August 2028
Before 17-Mar-2023

This bulletin supersedes 23-2020.

Model:

Ford Built on or before 17-Mar-2023
2021-2023 Mustang Mach-E

Markets: Canada, USA
Summary
This article supersedes TSB 23-2020 to update the Service Procedure.

Issue: Some 2021-2023 Mustang Mach-E vehicles built on or before 17-Mar-2023 may exhibit an illuminated malfunction indicator lamp (MIL) and/or
powertrain malfunction (wrench) indicator with diagnostic trouble codes (DTCs) P0563, POADA, POADE, POAA1, POAA4, POAAS, POAA2, POD10, PODOF,
and/or POC78 stored in battery energy control module (BECM). It may also have a low/discharged 12V battery and/or display a Stop Safely Now message
in the instrument panel cluster (IPC). This may be due to the high voltage battery junction box (HVBJB). To correct the condition, follow the Service
Procedure to replace the HVBJB and reprogram the BECM.

Action: Follow the Service Procedure to correct the condition on vehicles that meet all of the following criteria:

+ 2021-2023 Mustang Mach-E
+ Built on or before 17-Mar-2023

+ Illuminated MIL and/or powertrain malfunction (wrench) indicator with DTCs P0563, POADA, POADE, POAA1, POAA4, POAAS, POAA2,
POD10, PODOF, and/or POC78 in the BECM

Parts
Service Part Number|Quantity |Description Unit of Issue | Piece Quantity
LK9Z-10C666-BRM 1 High Voltage Battery Junction Box (GT) 1 1
NK4Z-10C666-CRM 1 High Voltage Battery Junction Box (AWD Base/Extended Range) 1 1
NK4Z-10C666-DRM 1 High Voltage Battery Junction Box (RWD Base/Extended Range) 1 1
W717859-S439 1 Battery Mounting Bracket Bolts 4 2
VC-13-G As Needed | Motorcraft® Yellow Concentrated Antifreeze/Coolant (All Markets Except Canada)
CVC-13-G As Needed | Motorcraft® Yellow Concentrated Antifreeze/Coolant (Canada Only)

Parts

Parts To Inspect And Replace Only If Necessary

Service Part Number | Quantity |Description Unit of Issue
LJ9Z-10A687-A If Needed | High Voltage Battery Cover Seal 1

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.

As Needed indicates the amount of the part may vary and/or is not a whole number. Parts can be billed out as non-whole numbers, including less than 1.
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

Description Operation Time
No.

2021-2023 Mustang Mach-E: Retrieve DTCs And Vehicle Build Date, Replace The HVBJB (Do Not Use With Any Operations 232257A | 5.7 Hrs.

Outside Of This Article)

2021-2023 Mustang Mach-E: Reprogram The Appropriate Modules As Required By The Software Update And Service MT232257 | Actual

Procedure, Includes Time To Download And Run The BECM Reset DTC Occurrence Counter Application If Required (Can Be Time

Claimed With Operation A)

Repair/Claim Coding
Causal Part: 10C666
Condition Code: | 42

Service Procedure

1. Replace the HVBJB. Refer to Workshop Manual (WSM), Section 414-03A, Removal and installation.
2. Reprogram the BECM to latest software available. The BECM is part of the powertrain coordinated flash.

(1). Connect a battery charger to the 12-volt battery. If the 12-volt battery is discharged, recover the battery. Refer to WSM, Section 414-01, Diagnosis
and Testing.

NOTE: To prevent the battery saver mode from activating on the vehicle, make sure the negative cable of the charger is installed on a chassis or
engine ground, and not the 12-volt battery negative terminal. Do not have the vehicle plugged into the high voltage battery charger during
programming. This can cause incorrect module programming. Make sure only the 12-volt battery charger is installed.

3. Reprogram the PCM using the latest software level of the Ford Diagnosis and Repair System (FDRS) scan tool.
4. Check the availability of software updates on the following modules and update as required:
* Secondary on-board diagnostic control module (SOBDM)