TSB 23-2348 - HVBJB Replacement - Service Vehicle Soon or Stop Safely Now Message

[Mach-Lee]

This TSB has been superseded by TSB 24-2017.

This is an update to TSB 23-2257 that removes the remanufactured part number for the HVBJBs and replaces them with the previous service part numbers from earlier this year. A reminder the service part number (found on the box label) is not the same as the actual part number (stamped on the unit). It would seem the remanufactured parts have been discontinued, and Ford has switched to manufacturing new parts, likely the new revisions mentioned in the recent NHTSA 23S56 recall documents.

Replacement BECM mounting bracket bolts are also a new part addition. The HVBJB replacement procedure was updated this summer to include the removal of the mid-pack busbar, which is underneath the BECM (BECM has to be unbolted and temporarily removed to reach it). This procedure change was likely for additional worker safety since open circuiting the pack bus would remove all voltage from the HVBJB before removal.

TECHNICAL SERVICE BULLETIN Illuminated MIL And/Or Powertrain Malfunction (Wrench) Indicator With Various DTCs - Built On Or Before 17-Mar-2023	23-2348 09 November 2023​
This bulletin supersedes 23-2257. Model: Ford 2021-2023 Mustang Mach-E Built on or before 17-Mar-2023 Markets: Canada, USA Summary This article supersedes TSB 23-2257 to update the Parts List. 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, P0ADA, P0ADE, P0AA1, P0AA4, P0AA5, P0AA2, P0D10, P0D0F, and/or P0C78 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, P0ADA, P0ADE, P0AA1, P0AA4, P0AA5, P0AA2, P0D10, P0D0F, and/or P0C78 in the BECM Parts Service Part Number Quantity Description Unit of Issue Piece Quantity LK9Z-10C666-B​ 1​ High Voltage Battery Junction Box (GT) 1​ 1​ NK4Z-10C666-C​ 1​ High Voltage Battery Junction Box (AWD Base) 1​ 1​ NK4Z-10C666-D​ 1​ High Voltage Battery Junction Box (RWD Base) 1​ 1​ W717859-S439​ 1​ Battery Mounting Bracket Bolts 4​ 2​ W720404-S450​ 1​ BECM Mounting Bracket Bolts (Extended Range Battery Only) 4​ 4​ 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 Piece Quantity LJ9Z-10A687-A​ If Needed​ High Voltage Battery Cover Seal 1​ 1​ Warranty Status: Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Service Part Warranty (SPW)/Special Service Part (SSP)/Extended Service Plan (ESP) coverage. Limits/policies/prior approvals are not altered by a TSB. NVLW/SPW/SSP/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool. Labor Times Description Operation No. Time 2021-2023 Mustang Mach-E: Retrieve DTCs And Vehicle Build Date, Replace The HVBJB (Do Not Use With Any Operations Outside Of This Article) 232348A​ 5.7 Hrs.​ 2021-2023 Mustang Mach-E: Reprogram The Appropriate Modules As Required By The Software Update And Service Procedure, Includes Time To Download And Run The BECM Reset DTC Occurrence Counter Application If Required (Can Be Claimed With Operation A) MT232348​ Actual Time​ 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) Battery energy control module (BECM) Secondary on-board diagnostic control module B (SOBDMB) Secondary on-board diagnostic control module C (SOBDMC) Anti-lock brake system (ABS) module NOTE: Only one module may be updated at a time. 5. Clear any stored DTCs related to this concern. 6. If DTCs P0ADA, P0ADE, P0AA1, and/or P0AA4 remain present, download and run the BECM - Reset Diagnostic Trouble Code (DTC) Occurrence Counter application in FDRS.

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[Kamuelaflyer]

Thanks Lee.

 

[Logal727]

This is an update to TSB 23-2257 that removes the remanufactured part number for the HVBJBs and replaces them with the previous service part numbers from earlier this year. A reminder the service part number (found on the box label) is not the same as the actual part number (stamped on the unit). It would seem the remanufactured parts have been discontinued, and Ford has switched to manufacturing new parts, likely the new revisions mentioned in the recent NHTSA 23S56 recall documents.

Replacement BECM mounting bracket bolts are also a new part addition. The HVBJB replacement procedure was updated this summer to include the removal of the mid-pack busbar, which is underneath the BECM (BECM has to be unbolted and temporarily removed to reach it). This procedure change was likely for additional worker safety since open circuiting the pack bus would remove all voltage from the HVBJB before removal.

TECHNICAL SERVICE BULLETIN Illuminated MIL And/Or Powertrain Malfunction (Wrench) Indicator With Various DTCs - Built On Or Before 17-Mar-2023	23-2348 09 November 2023​
This bulletin supersedes 23-2257. Model: Ford 2021-2023 Mustang Mach-E Built on or before 17-Mar-2023 Markets: Canada, USA Summary This article supersedes TSB 23-2257 to update the Parts List. 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, P0ADA, P0ADE, P0AA1, P0AA4, P0AA5, P0AA2, P0D10, P0D0F, and/or P0C78 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: Parts Service Part Number Quantity Description Unit of Issue Piece Quantity LK9Z-10C666-B​ 1​ High Voltage Battery Junction Box (GT) 1​ 1​ NK4Z-10C666-C​ 1​ High Voltage Battery Junction Box (AWD Base) 1​ 1​ NK4Z-10C666-D​ 1​ High Voltage Battery Junction Box (RWD Base) 1​ 1​ W717859-S439​ 1​ Battery Mounting Bracket Bolts 4​ 2​ W720404-S450​ 1​ BECM Mounting Bracket Bolts (Extended Range Battery Only) 4​ 4​ 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 Piece Quantity LJ9Z-10A687-A​ If Needed​ High Voltage Battery Cover Seal 1​ 1​ Warranty Status: Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Service Part Warranty (SPW)/Special Service Part (SSP)/Extended Service Plan (ESP) coverage. Limits/policies/prior approvals are not altered by a TSB. NVLW/SPW/SSP/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool. Labor Times Description Operation No. Time 2021-2023 Mustang Mach-E: Retrieve DTCs And Vehicle Build Date, Replace The HVBJB (Do Not Use With Any Operations Outside Of This Article) 232348A​ 5.7 Hrs.​ 2021-2023 Mustang Mach-E: Reprogram The Appropriate Modules As Required By The Software Update And Service Procedure, Includes Time To Download And Run The BECM Reset DTC Occurrence Counter Application If Required (Can Be Claimed With Operation A) MT232348​ Actual Time​ 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) Battery energy control module (BECM) Secondary on-board diagnostic control module B (SOBDMB) Secondary on-board diagnostic control module C (SOBDMC) Anti-lock brake system (ABS) module NOTE: Only one module may be updated at a time. 5. Clear any stored DTCs related to this concern. 6. If DTCs P0ADA, P0ADE, P0AA1, and/or P0AA4 remain present, download and run the BECM - Reset Diagnostic Trouble Code (DTC) Occurrence Counter application in FDRS.

New part sounds promising

 

[HuntingPudel]

New part sounds promising

There shouldn’t be any difference between a new part and a remanufactured part. parts stores and repair shops have been selling remanufactured stuff for decades. That said, I wouldn’t mind a new unit replacing the remanufactured one that went into my car a few months ago. ??

 

[Logal727]

There shouldn’t be any difference between a new part and a remanufactured part. parts stores and repair shops have been selling remanufactured stuff for decades. That said, I wouldn’t mind a new unit replacing the remanufactured one that went into my car a few months ago. ??

Well the implication is that maybe it is a better designed part?

 

[markboris]

Thanks Lee, and have a question. As you know I had my HVBJB replaced back in March of this year with the same part number that is listed on this TSB for the GT (LK9Z-10C666-B). It was a new part, not remanufactured. Am I to understand that the part I had installed is the same as what they are using now or did they upgrade this part and are using the same number?

 

[heisnuts]

I wonder if this is my fault too after they got the data back from my blown remanufactured HVBJB ?

 

[RickMachE]

I asked my dealership to have the mechanic note the internal part on the unit. They failed to do so.

I suspected all along that I'll need to have it done again anyway.

 

[heisnuts]

I asked my dealership to have the mechanic note the internal part on the unit. They failed to do so.

I suspected all along that I'll need to have it done again anyway.

Even under warranty, your invoice has to show the part numbers they used. It will show the part number and then N/C for the cost.

 

[RickMachE]

Even under warranty, your invoice has to show the part numbers they used. It will show the part number and then N/C for the cost.

It shows the RM part number, from the box. Not what number was on the part.

 

[heisnuts]

It shows the RM part number, from the box. Not what number was on the part.

I'm pretty sure it was the RM part then. I can't see ford labeling the part RM, but sending a new part.

 

[HuntingPudel]

Well the implication is that maybe it is a better designed part?

No, they are reverting the part number in the bulletin to the non-remanufactured part (i.e. “new”), where it previously called for the remanufactured part (which had a suffix of “RM”). it is the same part and specification as the remanufactured part that was installed in my car just a few months ago, only new and not remanufactured. ??

 

[Logal727]

No, they are reverting the part number in the bulletin to the non-remanufactured part (i.e. “new”), where it previously called for the remanufactured part (which had a suffix of “RM”). it is the same part and specification as the remanufactured part that was installed in my car just a few months ago, only new and not remanufactured. ??

Are you sure?

and Ford has switched to manufacturing new parts, likely the new revisions mentioned in the recent NHTSA 23S56 recall documents.

 

[heisnuts]

I suspect there was no way Ford would have enough remanufactured parts for the recall so they needed to switch to new. It might also be a requirement for the recall to have new parts vs remanufactured. It could also be that Ford went back to the supplier of the HVBJB and worked out some type of agreement to have them bear some of the cost to replace the HVBJB under the recall.

 

[MachE70]

Thanks Lee. What is the significance of the fact that this TSB only applies to cars manufactured on or before March 17, 2023? Does that mean that these new parts started being used in factory cars after March 17? I see that these part #'s were first introduced in TSB 23-2020 dated January 26, 2023, so I am having trouble reconciling the March 17 date. Or is it possible Ford is updating the part without changing the service part #?

If a MME manufactured after March 17 has an HVBJB failure, what TSB would they use for the replacement? Have any cars manufactured after March 17 had an HVBJB failure?

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