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April 12, 2021 NHTSA CAMPAIGN NUMBER: 21V253000
Electric Drivetrain Malfunction
An undetected high voltage isolation can expose service personnel to high voltage, increasing the risk of injury.
NHTSA Campaign Number: 21V253
Manufacturer Blue Bird Body Company
Components ELECTRICAL SYSTEM
Potential Number of Units Affected 292
Summary
Blue Bird Body Company (Blue Bird) is recalling certain 2018-2021 Vision and All American school buses. The electric drive train cannot detect isolation faults when the high voltage contactors are closed.
Remedy
Blue Bird will notify owners, and dealers will update the Vehicle Control Unit software or install a different combination of High Voltage Power Distribution Unit hardware, free of charge. The recall began on May 22, 2021. Owners may contact Blue Bird customer service at 1-478-822-2242. Blue Bird’s number for this recall is R21BD-SB.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
*** IMPORTANT SAFETY ***
NHTSA Recall No. 21E-024
Interim Recall Notice
May 22, 2021
Dear Cummins
Customer:
This notice is sent to you in accordance with the requirements of the National Trafic and Motor Vehicle Safety Act. Cummins Inc. has decided that a defect which relates to motor vehicle safety exists in certain Cummins PowerDrive TM electric drivetrain systems that were manufactured between June 1, 2018 and March 8, 2021.
This notice applies to the PowerDrive electric drivetrain systems in your vehicle listed on the enclosed table.
WHAT IS THE PROBLEM?
The subject electric drivetrain systems, as originally designed, did not include continuous isolation measurement capability to detect isolation faults in the system (between high voltage components and vehicle chassis ground) when the high voltage contactors are closed.
If a high voltage isolation fault is not detected and service personnel do not follow prescribed service procedures, they may be exposed to high voltage, increasing the risk of electrical shock. This issue does not present a hazard to occupants of a vehicle during operation.
WHAT WILL CUMMINS DO?
Cummins is currently developing the permanent remedy for this issue. You will receive a second notification to inform you when the final remedy is available and to provide instructions to schedule the recall for your PowerDrive system.
WHAT SHOULD YOU DO?
No action is necessary until you receive a second notification from Cummins.
If you have questions or concerns about this recall, please contact your local Cummins Distributor or authorized warranty dealer. You may also contact Cummins Care at 1-800- CUMMINS (1-800286-6467) or visit our website at care.cummins.com.
If you have a complaint relative to this recall, you may report it to the following:
Administrator
National Highway Traffic Safety Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
You may also call the toll-free Vehicle safety Hotline at 1-888-327-4236 (TTY: 1-800424-9153); or go to https://vvww.safercar.qov.
If you have not registered your Cummins product. please complete the enclosed registration card or register your product at https://prodreq.cummins.com/prodreq/#/webform/contactlnfo.
If you are no longer the owner of the vehicle listed on the enclosed table, please forward this notice to the new owner or provide the new owner’s contact information to Cummins so that we can notify them of this recall.
Federal law requires vehicle lessors receiving this recall notice to forward a copy of this notice to the lessee within ten (10) days. Also, it is a violation of Federal law for a dealer to deliver new vehicle or equipment covered by this recall notice under a sale or lease until the defect has been remedied.
Cummins is taking this action in the interest of safety and satisfaction with our products. We apologize for any inconvenience and thank you for your attention to this matter.
Sincerely,
Campaign Administrator
Cummins Inc.
21E024 Cummins
21E024 Cummins Electric Drivetrain PD7000 Isolation Faults Can Go Undetected
8 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
| BLUE BIRD | ALL AMERICAN | 2018-2021 |
| BLUE BIRD | VISION | 2018-2021 |
12 Associated Documents
Recall 573 Report- Amendment 1
RCLRPT-21V253-4493.PDF 215.707KB
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ISSUED Owner Notification Letter(Part 577)
RCONL-21V253-7120.pdf 35.346KB
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Recall Quarterly Report #1, 2021-2
RCLQRT-21V253-2763.PDF 211.131KB
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Defect Notice 573 Report
RCLRPT-21V253-7707.PDF 215.218KB
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Recall Acknowledgement
RCAK-21V253-4287.pdf 645.654KB
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Recall 573 Report- Amendment 3
RCLRPT-21V253-4228.PDF 215.93KB
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Manufacturer Notices(to Dealers,etc)
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ISSUED Owner Notification Letter(Part 577) – Final Remedy Available Notice from Cummins
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Recall Quarterly Report #3, 2021-4
RCLQRT-21V253-9383.PDF 211.319KB
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Recall 573 Report – Amendment 2
RCLRPT-21V253-4306.PDF 215.933KB
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Recall Quarterly Report #2, 2021-3
RCLQRT-21V253-5882.PDF 211.226KB
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Recall 573 Report – January 19, 2022
RCLRPT-21V253-8215.PDF 216.488KB
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Latest Recalls Documents
Heavy Duty Truck Reprogramming
Description:
Designed for flexibility, the USB-Link 3 Wired Edition connects to your PC, tablet, or smartphone with a USB cable, allowing techs to directly connect to a device when working in the field or during signal interruptions.
Built to support the latest protocols (CAN FD, DoIP) and compatible with a wide range of OEM diagnostics software, the USB-Link 3 is our most advanced VCI to date, with the performance and technology you can rely on well into the future.
The USB-Link™ 3 comes with the following:
- Latching USB Cable (PN 404032)
- 9-Pin Deutsch Adapter, 1 Meter (PN 493128)
- J1962 Adapter (16-Pin OBD II, 1 Meter (PN 491113)
The USB-Link™ 3: Wireless is also available (PN 121052).
Specifications
Vehicle Network Protocol Support
CAN FD / J1939 FD / ISO15765 FD - 250K, 500K, 1M b/s with auto baud detection
Single wire CAN (SWCAN)
ISO 11898-3 Fault Tolerant CAN (FTCAN)
Diagnostics Over Internet Protocol (DoIP)
J1708
J1850 VPW (Class 2)
ISO PWM (SCP)
ISO 9141 / KWP2000 (ISO 14230) K/L line
ALDL 9600 and 8192 baud
ATEC 160 baud
Windows® Vehicle Communication API
Windows® Vehicle Communication API
RP1210 a/b/c
J2534 (2004 draft)
J2534-1 partial implementation (commercial vehicle focused)
Operating System Compatibility
iOS
Android™
Windows® 10, 11
Interfaces to Computing Platforms
USB 2.0 (vehicle-to-PC connectivity)
Bluetooth® 2.1 + EDR
Wi-Fi (dual band)
Compatible Software
Detroit Diesel Diagnostic Link
CAT Electronic Technician (On-Highway only)
Cummins Insite
International - ServiceMAXX Fleet Pro
Hino eXplorer
Volvo PTT
VCAD Elite Mack/Volvo
V-MAC Service Tools
Allison DOC® For PC-Service Tool - Protocols Supported: J1939, J1708/J1587, and J1850
Allison DOC® For Fleets (1000/2000) - Protocols Supported: J1939, J1850
Allison DOC® For Fleets (3000/4000) - Protocols Supported: J1939, J1708/J1587
Eaton ServiceRanger
Bendix ACom
WABCO Toolbox
Freightliner ServiceLink
International ABS
International DLB
International Intune
International IPC v2.02
PACCAR DAVIE4
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Diesel Laptops Nexiq USB Link 3 Wireless Edition with Repair Information & Diagnostic Software |
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Diesel Laptops Nexiq USB Link 3 Wired Edition with Repair Information & Diagnostic Software |
| Nexiq Blue-Link Mini Product Number NQ126015 Nexiq Blue Link Mini™ Vehicle Communication Interface |
|
NEXIQ Technologies 124032 USB-Link 2 Connector |
|
Dearborn DPA5 Pro Universal RP1210 Protocol Adapter |
Daimler Truck
DiagnosticLink Order Site:
DiagnosticLink Direct Link:
https://diagnosticlink.nexiq.com/DTNA/Default.aspx
- 【Extensive Compatibility】After the upgrade, the compatibility is wider and more accurate! HD601 heavy duty truck scanner supports all major truck models that comply with standard protocols (SAE J1939, SAE J1708, ISO 14230-4, ISO 15764-4 and ISO 9141-2, ISO 27145-4 and Euro6). Fits for Cummins, Paccar, Detroit, Perkins, Freightliner, International, Peterbilt, Ford, Class 4-Class 8 trucks, etc. It also check engine diagnosis on most cars, minivans and light trucks
- 【 Full System Diagnostic】HD601 Diesel Scanner supports all system scans of heavy trucks compliant with standard protocols SAE J1939 & J1708, such as Engine, ABS, Transmission, Braking System, ESP, EPS, Fuel System, etc, It is a great scan tool fits for Cummins, Caterpillar, Detroit, Perkins, Maxxforce, Bendix,Wabash, Wabaco, Haldex, Allison, Eaton heavy trucks, With this truck tool, you can get deep analysis data about the system and do some repairs by yourself, saving much time and money
- 【Enhanced Diesel OBD Scanner】The HD601 Diesel OBD Scanner offers unparalleled diagnostic capabilities for heavy-duty trucks. Beyond code reading, clearing, and live data display, it retrieves vehicle information, freeze frames, and DTCs. With 6, 9, and 16 pin cables, it ensures compatibility with various engines. This scanner's real-world testing prowess ensures comprehensive support for a wide array of heavy-duty truck engines, making it an indispensable tool for truck diagnostics
- 【DTC Library】+【Life Time Free Update】The built-in DTC library allows you to retrieve the codes directly without searching for the definition in the book. Whether you are a professional mechanic or a DIY car owner, HD601 diesel scanner explains the existing problem, makes it easier for you to understand the codes definition and fix the problem faster. Plus, you get a lifetime free internet updates, so you always have the latest software for diagnostics in English and Spanish languages
- 【Friendly Design, Easy of Use】This scanner is plug and play, simple and convenient, and very friendly for beginners. With improved buttons for easy menu navigation. The excellent 2.8 inch LCD color screen makes it easy to view the displayed results and gives you a better overview of your car's problem areas and the identified codes. In addition, the processor is super-fast and responds without lagging, providing maximum comfort and efficiency in diagnostic and service work.
- 【Diesel Engines】HD500 heavy duty truck scanner is tailored to vehicles equipped with cummins, cat, detroit, paccar, international, hino and more engines. This diesel scan tool come with diverse adapters, including diesel 6 & 9 pin, CAT-9 pin, CAT-14 pin, 16 pin cable. It is engineered to deliver accurate and reliable diagnostics, ensuring compatibility and effective troubleshooting for your trucks. Tip: If your truck fault code is factory custom protocol, please enter the diagnostic menu, and then select the corresponding engine to test, so that your test data will be more accurate.(Please note that the HD500 does not have bidirectional and VGT calibration.)
- 【Advanced DPF Management】The longer a truck is in use, the more particles accumulate in the D.P.F and the more the D.P.F becomes clogged, affecting engine performance and emissions efficiency. This HD500 diesel scanner provides you with DPF regeneration, D.P.F reset, DPD, DPR status control and more functions to achieve efficient cleaning, optimise engine performance and prolong D.P.F life. Save maintenance costs by avoiding D.P.F replacement through regular D.P.F cleaning and D.P.F regeneration. All made easy with the HD500. Warm tips: the HD500 can't do dpf function on Isuzu.
- 【Cylinder Cut-off Services】The cylinder cut-off test can diagnose engine failure problems. The HD500 heavy duty truck scan tool sends a command to the ECU to cut off the injector of a cylinder to check if the injector of that cylinder is not working properly. If the engine speed drops more, the better the cylinder works; if the speed drop is not obvious or does not drop then the cylinder may be faulty; touch the high-pressure pipe between the common rail tube to the injector with your hand, the stronger the pulsation, the better the injection effect. This diesel scanner provides clear guidance for maintenance.
- 【Speed Limit Reset & ABS】Limit setting enables you can check and set the engine speed and the vehicle road speed limit when the vehicle is stationary, which ensures driving safety. And this diesel scanner also can make you achieve a firm brake pedal by removing air from the ABS module. HD500 truck scanner helps you maintain commercial vehicle breakdowns at all times, saving you money efficiently and winning more business for you! Please note that the adjust the speed limit is supported by fewer vehicles (eg: the cummins engine cannot support speed limit adjust), please confirm the vehicke VIN with us before purchase.
- 【Access All Major Systems with Ease】The HD500 heavy duty scanner truck diesel provides full diagnostic capabilities, covering the engine, ABS, SRS, EPB, Park Brake Controller, DPF, etc. Comes with full HD OBD/EOBD/ OBD2 service modes, including read codes, erase codes, live data, etc. Allows you to quickly identify issues and perform necessary solutions.
- 【2025 NEWEST LAUNCH 1st Advanced Scan Tool Compatible With 12V&24V Vehicles】Design for Passenger&Commercial Vehicles 2 in1,work for Cars/Trucks/buses/trailers/excavators/diesel engine/pick-up/etc.
- 【J2534 Reprogramming with Smartlink C】Advanced OEM J2534 reprogramming,Helps access direct data online, replace existing software/firmware in ECU,program new ECUs and fix software-controlled issue.
- 【Over 60 Service Reset Functions + Bi-Directional + ECU Coding 】This scan tool can support ECU Coding,60+ reset service functions like SAS/EPB/TPMS/DPF/Oil/Brake/ABS Bleed, Injector coding, etc.
- 【2025 BEST Advanced Hardware & All Systems Diagnosis+Topology Display 】Support All systems Diagnostic including ENG, AT, ECM, TCM, ABS, SRS, BCM, BMS, TPMS, SAS, Fuel System, Light System and more.
- 【Wider Vehicle Coverage of 12V & 24V Vehicles + 25 Languages】LAUNCH X431 PRO3S+SMARTLINK HD automotive scanner is ALL-IN-ONE Scan Tool for 12V cars and 24V Heavy-duty trucks support CANFD & DOIP.
- 🔥🔥🔥2025 New Functions Making X7 HD the Top Dog - Big Surprise!!! ANCEL X7 HD truck scanner 10 major functional advantages .✅>Full HDOBD/OBD2 Function ✅>ALL System Diagnostic ✅>42+ Reset Function ✅>Active Test / Bi-Directional Control✅>ECU Coding✅>Graphing Live Data✅>Wide Compatibility ✅>2 Yrs Free Update✅>Remote Operation✅>Bluetooth 5.0 & Wifi In addition, 8 major hardware advantages: ✅>6000 mAh✅>10.1 inch Tablet✅>2G RAM✅>32G ROM (Expandable to 128GB)✅>Data Record & Replay & Print✅>Android 10.0✅>Bluetooth 5.0 & Wifi✅>14 Languages
- 🚛OEM DPF Forced Regen & Cylinder Cutout Test & more - ANCEL X7 HD diesel scanner diagnostic tool not only supports DPF regeneration, DPF reset, DPF related information reset, DPR state reset, DPD forced regeneration etc, which helps you better solve the exhaust aftertreatment system problems, but also supports activate motor to do exhaust air in ABS Automatically. Moreover, it features TPMS activation, cylinder cut-off and learning functions.
- 🚛Advanced ECU Coding & Programming - ANCEL X7 HD 10.1inch truck scanner diagnostic tool is equipped with advanced ECU coding, supports Level calibration, Idle speed learning and Adjustment, Camshaft timing control learning, Control unit adaptations, Injector Codes, Read/Write VIN, Road speed limit optional vehicle speed set, etc... PLEASE NOTE that ECU codes are not compatible with all vehicles, please send us your VIN# to check vehicle compatibility.
- 🚛42+ Reset Functions & Bidirectional Control - 2025 newest top heavy duty truck scan tool, comes with 42+ special services (ECU, Speed Limit and Idle Reset, Oil Reset, Injector Coding, EPB, ABS, SRS, Suspension, Throttle, etc. and always keep growing), which meet all your various needs for service and maintenance. Please send your VIN# to our 💌 amazon@anceltech.com 💌 to check compatibility.
- 🚛10 Inch All Systems Diesel Scanner & Full HDOBD/OBD2 Modes - ANCEL X7 HD diesel truck scan tool supports all systems scan, such as Engine, Brake, Retarder, TECU Transmission, Tachograph, ABS, SRS, TPMS, EPB, SAS, ESP, and other vehicle systems, comes with 10 obd2 service modes: read/erase error codes, Data Stream, I/M Readiness, Vehicle Information, Actuations, DTC Lookup, EVAP, view freeze frame, etc.
- WHY NEXAS NL102+ Diagnostic Tool: Compared with many other heavy duty truck scanner, NL102+ diagnostic tool has more comprehensive diagnostic capabilities, supporting all system diagnostics for all major trucks that comply with standard protocols and full OBD2 functionality. In addition to read/clear codes, displaying live data, it also supports retrieving vehicle information, freezing frames, and DTC lookup. NL102+ OBD2 scanner comes with 6-pin, 9-pin, 16-pin connectors are available to ensure compatibility with a wide range of trucks. You'll get f-ree updates for life, so you always have the latest diagnostic software in English, Spanish and French
- Wide Compatibility: The NEXAS NL102+ heavy duty truck diagnostic scanner is compatible with all heavy-duty trucks that adhere to standard protocols (J1587, J1939, J1708). It covers a wide range of vehicle models, including Cummins, Detroit, Caterpillar, Freightliner, International, Kenworth, John Deere, Peterbilt, Sterling, Mack, Paccar, Western Star, Mercedes-Benz, Volvo, Scania, MAN, Renault, ERF, Foden, Seddon-Atkinson, Iveco, DAF, SISU, STEYR, and ISUZU. Additionally, it supports 10 modes of OBD testing for complete diagnostics and battery voltage monitoring on passenger cars and light vehicles (from Europe, America, and Asia) manufactured after 1996
- Save Up to Hundreds Money for All Heavy Duty Trucks: NEXAS NL102+ diesel scan tool supports accurate full system scanning for all heavy-duty trucks that comply with standard protocols (J1587, J1939, and J1708). This includes vehicle systems such as the engine, transmission, instrument panel, drivetrain, brake system, suspension, ABS, ESP, EPS, fuel system, etc. The diagnostic scan tool communicates with the vehicle's computer to retrieve data stream information, allowing it to accurately pinpoint issues. This reduces the waste caused by blind part replacements, saving your time and hundreds or thousands of money
- All OBD2 Function & Battery Health Monitoring: Compared with other products on the market that only support partial OBD2 functions, this OBD2 scanner supports all OBD2 functions: read/clear codes, live data, freeze frame data, I/M readiness, EVAP test, on-board monitor, O2 sensor test, vehicle information, and DTC lookup, this providing more analysis basis for professional technicians. By regularly detecting the status of the vehicle battery with NL102+ OBD scan tool, it helps to take measures before the battery completely fails to avoid the situation that the vehicle suddenly fails to start. It can accurately diagnose the battery's condition thus saving on repair costs
- Plug and Play & One-click for DTC: NEXAS NL102+ diesel scanner is user-friendly. It comes with an intuitive screen and easy-to-understand interface, making it accessible even for non-professionals to get started. And the built-in DTC library in the code reader allows you to directly retrieve codes without searching for definitions in books, making it easier to understand the code definitions and solve problems more quickly
- 【Wide Compatibility】HD430 supports 12V 24V trucks, equipped with diesel connectors (CAT-9, Diesel 6pin & 9pin) and OBDII 16pin, with strong truck adaptation and compatibility. Product supports SAE J1939, SAE J1708, SAE J1850 PWM, SAE J1850 VPW, ISO 14230-4, ISO 9141-2, ISO 15765-4, ISO 27145-4 truck protocols, provides complete scan & fast scan, and available in English and Spanish, it is suitable for DIY enthusiasts, old-school mechanics, truck owners or small repair shops.
- 【 D.P.F Regen For Cunmmis & Caterpillar】HD430 supports Cummins and Caterpillar engines for D.P.F reset & regeneration, helping to remove diesel particles from truck D.P.F & meet maintenance schedules, thereby avoiding fault codes, maintaining engine performance, and extending DPF & truck life. Even if you aren't a professional mechanic, you can easily perform D.P.F regen using HD430 according to clear instructions, which can help your truck avoid roadside obstacles while reducing your repair time & cost. ❕Note: Not compatible with pickups.
- 【Diesel Full System Diagnostic Tool】HD430 has excellent diagnostic performance, quickly scanning truck systems, detecting truck faults, while supporting the engine, ABS, transmission, fuel system and more. Read the fault code and DTC Lookup help you understand the cause of the fault, quickly clear the fault code after maintenance, so provide you with good maintenance assistance and convenience. HD430 heavy duty truck scanner will provide efficient, fast scanning of your truck system.
- 【Enhanced Diesel & Gasoline Scanner】HD430 has full HD OBD/EOBD/OBDII functions and supports heavy duty trucks with Cummins, Caterpillar, Detroit and Paccar engines. In addition to read & clear fault codes, view live data, ECUs, vehicle information, it also supports functions such as freeze frame, I/M readiness, on-board monitor test, etc. At the same time, the built-in DTC Lookup can help you quickly query and understand the specific definition of the fault code & solve the problem, providing strong support & convenience for your vehicle maintenance.
- 【Advanced Hardware & Design】4.3-inch screen, 8G memory, 8G TF, 2.4G Wifi & other hardware, your truck repair process will be more stable. Wifi Lifetime Free Update, you can always keep up with the latest diagnostic functions and optimized performance of HD430, compared with others, you can avoid expensive update subscription fees. The imperial conversion to meet your needs for the use of the unit of measurement. Unique horizontal screen button design, your operation will be more comfortable and convenient.
Last update on 2025-04-17 / Affiliate links / Images from Amazon Product Advertising API
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