2020 Blue Bird Vision School Bus TSBs

restricting coolant flow through the high voltage propulsion motor.

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.

update improvement to reduce occurrence of Engine fault codes 3555 and 3556 on Cummins diesel engines with the following base ECM calibrations, "HC80145 thru HC80250 and HB80104 thru HC80195"

to include additional new fault codes for all applicable system types (brake, engine, and transmission). Also, "Powertrain, Ford" has been added to the drop-down tab as a system type selection. "Powertrain Ford" system type is used to identify both Ford engine and transmission fault codes.

Also listed is a new Ametek gateway module and applicable software. New Ametek gateway module is only applicable to the Ford Gasoline Vision. Revisions have been made to Ametek instrument cluster software that improve or addresses items noted below. Improved fuel level dampening (only affects diesel fuel systems) Average fuel economy not displaying accurately (only affects diesel fuel systems) High or fast idle set up process on service part replacements (only affects service mode set up) Park brake indicator flashes and audible beep sounds when multiplex module goes in sleep mode (only affects certain Actia to Ametek service part replacements)

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.

2017 to March 21, 2019 have exposed holes in the rear side of the seat back frame that can allow a passenger(s) to insert their finger into the holes and possibly get their finger stuck. The number of exposed holes varies with the seat size. Only those holes directly visible to the passenger require plugs. The rear row seats are excluded. HSM has developed a Voluntary Technical Service Bulletin (S19ZI) for the installation of the hole plugs. HSM will provide parts at no cost. No labor will be reimbursed for the installation of the plugs. Affected Units: This service bulletin includes 2018 through 2020 Blue Bird All American and Vision School Buses manufactured from September 19, 2017 through March 21, 2019. Additionally, this service bulletin includes 2019 through 2020 Blue Bird All American and Vision Non-school buses manufactured from June 29, 2018 through February 16, 2019. A separate printout will be provided listing all buses in your territory that are affected by this service bulletin. Service Bulletin S19ZI 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: HSM will provide parts at no cost. Please remit requests for parts to Blue Bird via campaignparts@blue-bird.com using the Service Bulletin S19ZI Kit Order Card and include the Blue Bird Body Number on all documentation. Parts are currently available in limited quantities.

These codes indicate either a problem with the aftertreatment battery power/ground circuits, the proprietary data link circuits, or one of the components connected to the proprietary data link. Both Cummins and Blue Bird harnesses include the proprietary data link circuits, and power/ground circuits. Blue Bird harnesses include the aftertreatment powerground circuits, and the proprietary data link circuits on the OEM side of the 14-pin crossover connector that plugs to the Cummins engine harness. The Blue Bird supplied circuits go from the 14 pin OEM crossover connector to the SCR sensor table, DPF sensor table, and the DEF tank sensor. Proprietary data link circuits DO NOT go the the diagnostic port connector located inside the cab of the bus.

shipped from October 1, 2017 to February 1, 2019 have a missing bolt in the assembly. HSM testing has shown this issue is not a compliance concern and examination shows it does not pose a safety concern. HSM has developed a Voluntary Technical Service Bulletin (SB18-0018) for the installation of the missing bolt. HSM will provide parts at no cost and cover limited labor repayment for installation of the repair. Affected Units: This service bulletin includes 2020 Blue Bird All American School Buses manufactured from September 7, 2018 through September 28, 2018 and 2019 through 2020 Blue Bird Vision School Buses manufactured from December 8, 2017 through January 28, 2019. A separate printout will be provided listing all buses in your territory that are affected by this service bulletin. Service Bulletin S19ZZ will be mailed to all owners on record. Be sure to review your list and advise of any incorrect owner names and/or addresses. On the subject buses, the Dealer is to execute the seat repair in accordance with the service repair procedure SB18-0018 or you may elect and have the option to perform this Service Bulletin yourself or have a qualified repair facility convenient to you perform this work. A qualified technician must perform work required under this bulletin. Repair Parts: Reference attached HSM Service Repair Procedure SB18-0018. Time Allowance: Reference attached HSM Service Repair Procedure SB18-0018. Completion Notification: Please Contact HSM Customer Service at: HSM Customer Service Gina Moore, Senior Customer Service Manager and Sales 256 Industrial Blvd. Fort Valley, GA 31030 Cell Phone: 478-542-3888 Phone: 478-822-0800 Fax: 419-492-2544 glmoore@hsmsolutions.com

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 Product.

Powertrain Control Module (PCM) modification remotely at the dealer service center location. This modification will be done using the Roush Diagnostic Tool (RDT). The RDT software version 10.04.0011 or higher is required.

Additionally, the wiring harness (PN 10023917) connected to the relay base should be inspected for any sign of damage and replaced, if necessary. Blue Bird will provide parts at no cost and will reimburse the repair time in accordance with the information presented below. Affected Units: This service bulletin includes: Certain model year 2015-2021 Vision School Buses manufactured from August 5, 2014 through September 11, 2019. Certain model year 2016-2021 All American School Buses manufactured from May 8, 2015 through September 8, 2019. Certain model year 2016-2021 Vision Non-school Buses manufactured November 20, 2014 through August 10, 2019. Certain model year 2015-2020 All American Non-school Buses manufactured September 15, 2014 through September 7, 2019. A separate printout is included which lists all of your buses that are affected by this service bulletin

Visions with a Ford gasoline powertrain and heat shield. To correct this condition, the Dealer is to cut the zip ties and remove the swivel saddle, if the heat shield is installed. Affected Units: On certain 2020 model year Blue Bird Vision School Buses manufactured from October 31, 2018 through March 16, 2019 and certain model year Blue Bird Vision Non-School Buses manufactured from November 15, 2018 through February 7, 2019, the Dealer is to cut zip ties and remove the swivel saddle if heat shield is installed. A separate printout will be provided listing all buses in your territory that are affected by this service bulletin. Service Bulletin S19AB 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 repair parts are required. Time Allowance: Time allowed to complete the S19AB remedy to cut the zip ties and remove the swivel saddle in each bus is 0.1 hours.

Visions with a Ford gasoline powertrain and heat shield. To correct this condition, the Dealer is to cut the zip ties and remove the swivel saddle, if the heat shield is installed. Affected Units: On certain 2020 model year Blue Bird Vision School Buses manufactured from October 31, 2018 through March 16, 2019 and certain model year Blue Bird Vision Non-School Buses manufactured from November 15, 2018 through February 7, 2019, the Dealer is to cut zip ties and remove the swivel saddle if heat shield is installed. A separate printout will be provided listing all buses in your territory that are affected by this service bulletin. Service Bulletin S19AB 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 repair parts are required. Time Allowance: Time allowed to complete the S19AB remedy to cut the zip ties and remove the swivel saddle in each bus is 0.1 hours.

limitations of the mechanical switch. As a result, a preventative maintenance adjustment procedure is necessary and, at times, settings can be difficult to achieve.

Electric buses now available at Quickserve Online. Dealer must have access to Quickserve to obtain these service maintenance and repair procedures.