2017 Blue Bird All American

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.

The intent of Service Memorandum SM1906 is to make Blue Bird dealers aware that Cummins has released a calibration 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"

Models Affected: 2010 thru 2021 All American Subject: This update provides information on the new surge tank fill necks for All American Instructions: There is a new kit available from Part Sales; 10066291 - Kit, Neck, Surge Tank. This kit is available for use with the All American & TX4 surge tanks. Remove and discard existing neck from tank Install new neck using items in Kit 10066291 Kit, Neck, Surge Tank

SM1904: New Ametek Parts & Software New Ametek instrument cluster part numbers and software now listed on the Blue Bird Dealer Vantage website. 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)

SM1905: Blue Bird Vantage Dash Fault Codes Website Blue Bird Vantage "Dash Fault Codes" website page has been updated 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.

Blue Bird has determined that the CIT brand air conditioning relays should be replaced with Song Chuan brand relays (PN 00079077). 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