NHTSA ID Number: 11020020
Manufacturer Communication Number: TSB-0625-02
TSB/Document Date: 2025-07-01
Summary
The updated VCU software includes enhancements for 12V and high-voltage battery
conditioning, as well as resolving issues with incorrectly stored faults. The revised TCU software enhances the thermal management system and eliminates erroneously stored faults. The updated OTA software enables TCU and BMS diagnostics to be reported over the air. Additionally, the improved BMS software enhances fault detection and decreases the overall time required for cell balancing.
Release Date: 06/23/2025
Technical Service Bulletin (“TSB”)
Bulletin Title: Vehicle Control Unit (“VCU”), Thermal Control Unit (“TCU”), High Voltage Battery Management
System (BMS), and Over-the-Air Module (“OTA)” Software Update
Bulletin Number:
TSB-0625-02
Subject: This bulletin TSB-0625-2 supersedes bulletin TSB-0425-01 and adds more VINS to these module
software updates. Vehicles updated with TSB-0425-01 will require this bulletin to be applied, updating the
listed modules outlined in this document.
Affected Vehicle & Model Information:
Make: Bollinger
Model: B4
Year: 2025
Production Date Range: 09/27/2024 to 11/21/2024
VIN(s):
7WE45CN57SL000038
7WE45CN52SL000027
7WE45CN55SL000040
7WE45CN57SL000033
7WE45CN52SL000058
7WE45CN5XSL000034
7WE45CN55SL000023
7WE45CN57SL000035
7WE45CN52SL000044
7WE45CN58SL000033
7WE45CN55SL000054
7WE45CN57SL000036
7WE45CN51SL000052
7WE45CN50SL000060
7WE45CN57SL000069
7WE45CN57SL000037
7WE45CN59SL000025
7WE45CN53SL000022
7WE45CN55SL000071
7WE45CN5XSL000034
7WE45CN50SL000057
7WE45CN50SL000043
7WE45CN59SL000073
7WE45CN52SL000027
7WE45CN59SL000056
7WE45CN59SL000039
7WE45CN57SL000055
7WE45CN5XSL000020
7WE45CN58SL000047
7WE45CN53SL000053
7WE45CN56SL000046
7WE45CN54SL000028
7WE45CN54SL000045
7WE45CN53SL000070
7WE45CN59SL000042
7WE45CN50SL000026
7WE45CN57SL000041
7WE45CN57SL000024
7WE45CN57SL000072
7WE45CN58SL000002
7WE45CN52SL000013
7WE45CN54SL000014
7WE45CN58SL000016
7WE45CN5XSL000020
7WE45CN53SL000019
7WE45CN57SL000030
7WE45CN56SL000029
Disclaimer and Confidentiality Notice
These bulletins are intended solely for use by professional technicians with the appropriate training, tools, and safety knowledge to perform service and
maintenance accurately and safely. They provide essential information on potential conditions that may affect specific vehicles or offer guidance for correct
service procedures. Bollinger Motors is not liable for issues arising from incomplete or improperly performed procedures.
If a condition is described, please do not assume it applies to all vehicles. To determine whether a specific vehicle may benefit from this information, consult
your authorized Bollinger Motors dealer.
This document and its contents are confidential and intended for limited distribution. The information herein may be subject to change. For the latest and
most accurate version, refer to the Bollinger Motors Dealer Portal.
Bulletin Description: Update the VCU, TCU, BMS, and OTA software to the latest version.
Symptom: The current software for the VCU and TCU may cause various fault codes to be stored in the
vehicle's fault memory. This issue prevents proper High-Voltage Battery Cell Balancing when using a DC fast
charger. It can cause the 12V battery to drain. Additionally, the OTA does not currently detect faults related to
the High Voltage Battery. The BMS may report a false positive diagnostic fault code, indicating a stuck closed
contactor, and does not effectively optimize cell balancing time.
Discussion: The updated VCU software includes enhancements for 12V and high-voltage battery
conditioning, as well as resolving issues with incorrectly stored faults. The revised TCU software enhances the
thermal management system and eliminates erroneously stored faults. The updated OTA software enables
TCU and BMS diagnostics to be reported over the air. Additionally, the improved BMS software enhances fault
detection and decreases the overall time required for cell balancing.
Note: These updates are intended to improve vehicle diagnostics and performance. These updates do not
alter vehicle hardware or the vehicle's system integrity or safety.
Labor Operation: 1015.1060 General Purpose Labor Time
Labor Time Allocation: 1.0 hour
Parts Required:
Quantity
1
Part Number
S102793E
Part Group
Description
Electrical Controls
VCU Software Update: starting with 8.2.0.0.0
Primary from Software Ver: 8.2.0.0.0 to 8.10.0.0.0
Secondary from Software Ver: 2.0.0.0.0 to 2.1.2.0.0
VCU Software Update: starting with 8.8.0.0.0
Primary from Software Ver: 8.8.0.0.0 to 8.10.0.0.0
Quantity
1
Part Number
S069119E
Part Group
Electrical Controls
Description
TCU Software Update: starting with 9.2.0.1.0
From Software Ver: 9.2.0.1.0 to 9.10.0.0.0
TCU Software Update: starting with 9.8.0.0.0
From Software Ver: 9.8.0.0.0 to 9.10.0.0.0
Quantity
1
Part Number
S102807C
Part Group
Electrical Controls
Description
OTA Software Update:
From Software Ver: 24.42.6.0 to 25.21.6.0
Quantity
1
Part Number
S081559C
Part Group
Electrical Controls
Description
BMS Software Update
From Software Ver:8.2.0.0 to 8.4.0.0b
Disclaimer and Confidentiality Notice
These bulletins are intended solely for use by professional technicians with the appropriate training, tools, and safety knowledge to perform service and
maintenance accurately and safely. They provide essential information on potential conditions that may affect specific vehicles or offer guidance for correct
service procedures. Bollinger Motors is not liable for issues arising from incomplete or improperly performed procedures.
If a condition is described, please do not assume it applies to all vehicles. To determine whether a specific vehicle may benefit from this information, consult
your authorized Bollinger Motors dealer.
This document and its contents are confidential and intended for limited distribution. The information herein may be subject to change. For the latest and
most accurate version, refer to the Bollinger Motors Dealer Portal.
Bulletin Repair Procedure Details
1. Verify that the low-voltage battery state of charge is 12 volts or higher with the main battery switched
off.
2. Verify the vehicle voltage before starting the update process and monitor it throughout.
3. Update the Software Version for VCU, TCU, and BMS, and check the software in the OTA as outlined
in this technical bulletin.
The update sequence includes the following steps:
a. Connect the breakout Onboard Diagnostic (“OBD”) cable to the OBD port in the vehicle.
b. Ensure the breakout OBD harness is connected to the Vector CAN Case.
c. Connect the Vector CAN Case to the USB port on the laptop. Ensure the Bollinger Motors laptop is
connected to a power supply.
d. Connect the laptop to the internet using a Wi-Fi connection.
e. Start a Microsoft Teams connection on the laptop with the Bollinger Motors Software personnel.
f. Allow Remote Control access to the laptop.
g. Bollinger Motors Software personnel will update VCU SW remotely and also check for proper range
calculation value to be set.
h. Power up the vehicle (Key in --> ACC --> RUN).
i. Wait for directions from the Bollinger Motors Software personnel to cycle the vehicle (Turn ignition
OFF, wait 60 seconds, and Turn ignition ON).
4. Update the Software Version for TCU as outlined in this technical bulletin.
The update sequence includes the following steps:
a. Connect the breakout OBD cable to the OBD port in the vehicle.
b. Make sure the breakout OBD harness is connected to the KVaser tool.
c. Connect the KVaser tool to the USB port on the laptop. Ensure the Bollinger Motors laptop is
connected to a power supply.
d. Connect the laptop to the internet using a WiFi connection.
e. Start a Microsoft Teams connection on the laptop with the Bollinger Motors Software personnel.
f. Allow Remote Control access to the laptop.
g. If not powered, power up the vehicle (Key in --> ACC --> RUN).
h. Bollinger Motors Software personnel will update TCU SW remotely.
i. Wait for directions from the Bollinger Motors Software personnel to cycle the vehicle (turn off, wait
60 seconds, and Then Turn the ignition on).
5. Update the Software Version for BMS as outlined in this technical bulletin.
The update sequence includes the following steps:
a. Connect the breakout OBD cable to the OBD port in the vehicle.
b. Make sure the breakout OBD harness is connected to the Vector tool.
c. Connect the Vector CAN Case to the USB port on the laptop. Ensure the Bollinger Motors laptop is
connected to a power supply.
d. Connect the laptop to the internet using a WiFi connection.
Disclaimer and Confidentiality Notice
These bulletins are intended solely for use by professional technicians with the appropriate training, tools, and safety knowledge to perform service and
maintenance accurately and safely. They provide essential information on potential conditions that may affect specific vehicles or offer guidance for correct
service procedures. Bollinger Motors is not liable for issues arising from incomplete or improperly performed procedures.
If a condition is described, please do not assume it applies to all vehicles. To determine whether a specific vehicle may benefit from this information, consult
your authorized Bollinger Motors dealer.
This document and its contents are confidential and intended for limited distribution. The information herein may be subject to change. For the latest and
most accurate version, refer to the Bollinger Motors Dealer Portal.
e.
j.
k.
l.
m.
Start a Microsoft Teams connection on the laptop with the Bollinger Motors Software personnel.
Allow Remote Control access to the laptop.
If not powered, power up the vehicle (Key in --> ACC --> RUN).
Bollinger Motors Software personnel will update BMS SW remotely.
Wait for directions from the Bollinger Motors Software personnel to cycle the vehicle (turn off, wait
60 seconds, and Then Turn the ignition on).
6. Over the Air, update the Software Version for OTA as outlined in this technical bulletin.
The update sequence includes the following steps:
a. If not powered, power up the vehicle (Key in --> ACC --> RUN).
b. Bollinger Motors Software personnel will update OTA SW remotely.
c. Wait for directions from the Bollinger Motors Software personnel to cycle the vehicle (Turn OFF,
wait 60 seconds and Turn the ignition ON).
Post-Repair Actions
1. Verification: Check if warning telltales are illuminated in the cluster. Verify that the vehicle can charge
(slowly or quickly). Ensure that the vehicle can start in Ready mode.
The technician is responsible for verifying that the vehicle is operating normally after completing the
software updates.
2. Documentation: Copy of this TSB in a PDF and repair order as the attachments to the warranty claim.
3. Warranty Submission: To submit the warranty claim for this technical service bulletin, select Dealer
Stock Unit (not PDI) as the Service Type on the claim. Select Complaint, Cause, and Corrective Action,
and add descriptions. Attach a copy of the TSB and the repair order to the claim.
Warranty coverage is subject to verification of VIN eligibility, proper documentation of performed
procedures, and successful software update completion. Submitting false claims may result in rejection
or audit action.
4. Please use labor operation - General Purpose Labor Time - 1015.1060. Labor Time - 1.0.
Disclaimer and Confidentiality Notice
These bulletins are intended solely for use by professional technicians with the appropriate training, tools, and safety knowledge to perform service and
maintenance accurately and safely. They provide essential information on potential conditions that may affect specific vehicles or offer guidance for correct
service procedures. Bollinger Motors is not liable for issues arising from incomplete or improperly performed procedures.
If a condition is described, please do not assume it applies to all vehicles. To determine whether a specific vehicle may benefit from this information, consult
your authorized Bollinger Motors dealer.
This document and its contents are confidential and intended for limited distribution. The information herein may be subject to change. For the latest and
most accurate version, refer to the Bollinger Motors Dealer Portal.
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TSB/Document ID: TSB-0625-02
Replacement Service Bulletin Number:
MFR Communication Date: 2025-06-23
MFR Internal Campaign ID/Software Version: S102793E, S069119E, S081559C, S102807C
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL/PROPULSION SYSTEM
MFR Component System: VCU TCU BMS OTA
MFR Component Subsystem:
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