Vehicle report
Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
S26DZ
The mechanical brake switch & bracket design has a potential for cumulative at-limit stack up clearances to exceed the limitations of the mechanical switch. As a result, a preventative maintenance adjustment procedure is necessary and, at times, settings can be difficult to achieve.
SI10-800-160
Suspect Population: Certain 2021 through 2026 Blue Bird BBCV buses, equipped with a 217” WB flat floor & Ford 7.3L powered engine. Condition:Chassis web fractures in or around the vicinity of the LF shock mount Root Cause Identification and Justification: • FEA modeling shows elevated regions of stress in proximity of the upper fastener hole for the LH shock mount resulting from several external influences. The highest stress stemming from shock extension forces in curb hop scenarios. • Bearing in mind the absence of this failure mode on standard floor chassis designs with substantially higher usage, the projected stress in this region of 4582 PSI is used as an objective bench mark of the acceptable upper limit. • Two corrective solutions are being executed as pragmatic countermeasures to correct this failure mode, based on the severity and frequency of the crack, if present. Repair plate 1 being the latest evolution. FEA analysis & ref chart below • Installation of this repair plate decreases the stress in this region to less than the standard floor chassis baseline allowing us to predict this solution to last the expected life of the chassis.
SU2302
Revised: Coolant leaks at the transmission cooler fittings on the radiator are occurring due to deformation of the gasket used to seal off the transmission cooler. This deformation is caused from transmission oil wicking through the thread adapter threads and exposing the lower portion of the gasket to transmission oil. Re-configure hydraulic interface between the transmission cooler lines and the transmission oil cooler. SU2302 Revised to include Labor Time of 1 Hour and a Component Code. Incorrect wording on the Header Page beginning on Page 2.
SM 23-01
A motor high temperature error can display on the instrument cluster when the OEM coolant valve in the closed position restricting coolant flow through the high voltage propulsion motor.
SM2201
SM2201 Ford 7.3L PATS Module Familiarization PATS Immobilizer Module: Purpose, Functionality, and Troubleshooting The PATS (Passive Anti-Theft System) or SPM (Security PATS Module) is a new piece of required hardware that has not been used historically on Ford powered Blue Bird Vision Buses. The intent of this memo is to provide a basic overview of its function, purpose, and basic diagnostics. The 7.3L PCM hardware requires a PATS handshake to enable engine crank. The PATS module, sometimes called an SPM, is paralleled to Ford CAN only and not to J1939. Itâs mounted above the MPX module (non-NEA) within the PDU and on NEA models it is located on the ledge above the chassis PCB. The PATS module is purpose built for non-Ford VIN applications using the 7.3L engine. It is paired to the PCM via an IDS bi-directional function, to which one needs Ford PTS log in credentials for IDS access to the immobilizer database.
SM2202
SM2022 EV Maintenance and Service Documentation This Service Memorandum is to announce information on Cummins Power Electric buses now available at Quickserve Online. Dealer must have access to Quickserve to obtain these service maintenance and repair procedures.
SM2203
SM2203: EV Recommended Starting Procedure This Service Memorandum is to announce the proper starting procedure to be followed for all Cummins EV powered units. The sequence is required due to multiple electronic modules required to wake up and start communicating over the CAN (Controller Area Network) on EV Power Train Productâ.
SU2201
Cummins recently issued Temporary Repair Practice (TRP2484) for certain vehicles with DEF sensor failures in which DEF sensor replacement parts are not available. This provides a temporary ECM calibration that inhibits engine warning messages for communication errors with the DEF sensor allowing continued operation without engine derate. Regulators are allowing for this temporary calibration to be loaded in the engine ECM by a Cummins authorized repair location if the DEF sensor fails. This temporary calibration does not repair the failure therefore a final repair must be performed and the original calibration be re-installed. Field Service has been requesting an ECM image be uploaded within the support ticket as part of the diagnostics and is carried over into Service Update 2201 (SU2201). In order to receive an authorization code and utilize Cummins TRP2484, you must follow the process, as outlined in SU2201. The specific component affected is Assembly Code: 35-300 Emissions Components.
SU22-02
This document provides information on the cluster software improvement to address symptoms of acceptable parasitic battery loss attributed to CAN Devices not going to sleep. This symptom is occasionally accompanied by the cluster flashing on/off on an approximately 3-minute frequency. Blue Bird and Ametek have developed a software to alleviate this concern.
S21BK
Overview: Certain 2022 model year Blue Bird Vision School Bus units that are equipped with a ROUSH CleanTech 7.3L V8 gasoline or propane engine, with or without an air pump, Roush and Blue Bird have identified a concern with falsely setting misfire codes. This may or may not be combined with fuel gauge accuracy concerns and these concerns may cause a check engine light to be illuminated. Affected Units: Roush and Blue Bird is voluntarily issuing a Service Bulletin for the following: Certain model year 2022 Blue Bird Vision School Buses Manufactured from May 3, 2021 through July 16, 2021 A separate printout will be provided listing all buses in your territory that are affected by this service bulletin. Service Bulletin S21BK will be mailed to all owners on record. Be sure to review your list and advise of any incorrect owner names and/or addresses. Repair Parts: No additional parts/items are required to perform Service Bulletin S21BK. Please reference the Roush Instructions and reference the link to obtain a Voucher Code. Labor Reimbursement Complete ROUSH CleanTech warranty claim for reimbursement. A warranty claim was automatically generated when obtaining your voucher code. Reprogramming is covered using operation RCTE04B Powertrain Control Module (PCM) - Reprogramming and pays 0.5 hours at your current established warranty labor rate. Once flashing is completed, you can attach a copy of your Repair Order (RO) to the case for payment. Roush CleanTech will notify Blue Bird Campaigns Administration of the completion of Service Bulletin S21BK. The Roush CleanTech, LLC. contact for Service Bulletin S21BK campaign is as follows: Customer Service 1-800-59-ROUSH (OPT2) support@roushcleantech.com www.roushcleantech.com/service Time Allowance: Time allowed to perform the flash is .5 hours (30 minutes). Completion Notification: To request reimbursement for completed repairs, please reference the details within the Roush Instructions.
S21AZ
Overview: Certain 2013 through 2022 model year Blue Bird Vision School and Non-School Bus units has experienced signs of single strand failing, leading to multiple stands, and eventually belt failure. The belt composition is not ideal for the life cycle of the bus. This Service Bulletin will provide owners with a one-time new replacement belt with the more durable material that is currently being used in production and for service. This Service Bulletin is for part cost coverage only. No labor reimbursement will be provided. Affected Units: Blue Bird Body Company is voluntarily issuing a service bulletin for the following: o Certain model year 2013 through 2022 Blue Bird Vision School Buses omanufactured from January 10, 2012 through February 26, 2021 o Certain model year 2013 through 2022 Blue Bird Vision Non-School Buses omanufactured from November 20, 2012 through November 19, 2020 Repair Parts: The Parts List outlined in the S21AZ Instructions details the part required to perform Service Bulletin S19AZ and should be ordered through Blue Bird Service Parts. The belt is based on the engine generation. Parts are currently available. Time Allowance: No labor will be provided to replace the belt with a more durable material belt, per the published Service Bulletin instructions.
SU2105
The intent of Service Update SU2105 is to provide service notification of a running product improvement part change to the relay used for diesel exhaust fluid (DEF) line heaters. The new DEF line heater relay will be "Diode Suppressed". The new relay change is being made to improve circuit fault diagnostic capabilties. This change implements two new diode suppressed relay part numbers based on bus model application. The new relays are easily distinguishable by color. They have a yellow high temp tape wrap. Models Affected: Vision (BBCV), All American, and TX4 (T3FE, T3RE), with EPA/CARB certified on highway Cummins® Diesel Engine Features Built After 07/26/2021 Subject: The intent of Service Update SU2105 is to provide service notification of a running product improvement part change to the relay used for diesel exhaust fluid (DEF) line heaters. Information: The new DEF line heater relay will be "Diode Suppressed". The new relay change is being made to improve circuit fault diagnostic capabilities. This change implements two (2) new diode suppressed relay part numbers based on Blue Bird bus model application. The new relays are easily distinguishable by color. They have a yellow high temp tape wrap. New Diode Suppressed Relay Type, Part Number, And Application: Diode Suppressed âMicro Relayâ 10073451 â All American and TX4 (T3FE, T3RE) with Cummins Diesel Engine Features Built After 07/26/2021 Diode Suppressed âMini Relayâ 10073452 â Vision (BBCV) with Cummins Diesel Engine Features Built After 07/26/2021
SU2104
The intent of Service Update SU2104 is to provide a quick reference document of âRequired Dealer Service Support Softwareâ for servicing, a current production model Blue Bird Bus. The list includes standard OEM bus and truck service software such as; Cummins INSITE®, and Allison DOC®, and it also includes unique service software applications that are required to fully service a Blue Bird bus such as; AMETEK®, ACTIA®, and MODINE®. These software applications provide troubleshooting support and software update capabilities. This document is intended to be a âliving documentâ and will be updated as advancements are made in technology and product improvements are implemented. Therefore, to ensure you always have the latest revision it is highly recommended that the document be downloaded from the Blue Bird Vantage website.
SU2103
The intent of Service Update SU2103 is to announce a new Shaw Development Technical Bulletin. The Technical Bulletin is intended to guide Shaw Development customers in troubleshooting fault codes related to the DEF tank assembly on Cummins engine equipment. This document is intended to be a âliving documentâ, and the details and processes within can/will change as system designs evolve, or other new information comes to light. Access to this Shaw Development Technical Bulletin will be available on the Blue Bird Vantage website.
SU2101
The intent of Service Update SU2101 is to provide instruction when windshield replacement is required on buses equipped with Blue Bird Factory Installed Mobileye Collision Mitigation Features. Applicable Blue Bird features: 38105-34 âMOBILEYE,COLLISION MITIGATION,250kBâ USA 38105-35 âMOBILEYE,COLLISION MITIGATION,500kBâ USA (NEA Only)
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.