2021 Freightliner Cascadia Technical Service Bulletins

509 technical service bulletins (TSBs) are on record for the 2021 Freightliner Cascadia. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 10181323Oct 15, 2020Suspension. Customer Advisory Letter for Drive Axle Leaf Spring Pin Hex Nut Torque Inspection. Select New Cascadia vehicles may have been delivered to customers with insufficient torque applied to the hex nuts at the front of the spring hanger.
• 10181321Oct 15, 2020Electrical system. Important Campaign Information Letter for SF576, SF610, & SF611 - Revised Bulletins. This letter is to inform you that revised bulletins for FOTA Field Service Campaigns SF576, SF610, and SF611 are available on DTNAConnect. Please print and use the revised bulletin for all work under SF576, SF610, & SF611 from this point forward. REVISION: The work instructions on all campaigns have been updated, a new campaign…
• 10181320Oct 15, 2020Electrical system. Revised Field Service Campaign for Cascadia CTP Reset. Certain vehicles equipped with DTNA's proprietary Common Telematics Platform (CTP) are not communicating and, therefore, are unable to benefit from over-the-air software updates. The CTP will be reset and some will also be initialized.
• 10181052Oct 12, 2020Engine cooling, Equipment. DDC Technical Service Letter for GHG17 DD Platform Heavy Duty Oil Pan Drain Plug Inserts. Some GHG17 DD Platform Heavy Duty oil pans may experience an issue with the oil pan drain plug insert spinning during removal or installation while completing an oil change. Leaking may also be observed at the drain plug and/or other plugs in the oil pan.
• 10182010Oct 9, 2020Equipment, Engine cooling. Tech talk discussion on 2021 Cascadia opt idle issues.
• 10182006Oct 9, 2020Engine cooling, Equipment. Tech talk discussion on DD harness Chaffe.
• 10181967Oct 8, 2020Lane departure, Forward collision avoidance. Tech Talk discussion on Detroit Assurance shutting down.
• 10181050Oct 7, 2020Equipment, Electrical system. Updated Freightliner Service Bulletin for Rewiring the MPC2 Camera Fuse. This bulletin replaces the version dated 9/15/20. Information has been added about raising the system voltage to normal range to clear the "Lost Communication to MPC" code. The multipurpose camera 2 (MPC2) power is supplied via fuse 14 (F14) in New Cascadia vehicles built before August 24, 2020.
• 10181049Oct 7, 2020Transmission and drivetrain, Equipment. Freightliner Service Bulletin for Axle Flange Gasket Replaced with O-Ring. Daimler Trucks North America has released a new axle shaft to hub rubber O-ring (part number 11-30728-000) as a replacement for the paper gasket (part number 11-14418-000). The new O-ring will provide better sealing and is reusable. It is quicker and easier to use compared to the paper gasket, because using a paper gasket requires cleaning…
• 10182002Oct 6, 2020Vehicle speed control. Tech Talk discussion on Cruise Control Intermittently Dropping Out.
• 10181992Oct 6, 2020Equipment, Engine cooling. Tech Talk discussion on DETROIT D20M8 ASM DELETED.
• 10182030Oct 5, 2020Equipment, Electrical system. Tech Talk discussion on Diagnostic Link connection issues with D20M8.
• 10181991Oct 5, 2020Steering. Tech Talk discussion on Active Power steering System concerns.
• 10181963Oct 2, 2020Seats, Electrical system. Tech Talk discussion on fault 523013/31 seat occupation not ok.
• 10181957Oct 2, 2020Equipment, Electrical system, Electronic stability control. Tech Talk discussion on ABS trailer code 520216 31 P4 New Cascadia.
• 10181974Oct 1, 2020Fuel system, Other or unknown, Engine cooling. Tech Talk discussion on 1 Aftertreatment System Problem Detected.
• 10180517Sep 30, 2020Engine cooling. Detroit Diesel Special Publication informing about Heavy Duty Friction Style Belt Tensioner Kit. This heavy duty friction style belt tensioner kit contains the belt tensioner and two M10 bolts to correctly pin the friction style belt tensioner. The M10x80mm bolt is used to pin the engine cooling fan drive arm. The M10x50mm bolt is used to pin the engine accessory drive arm.
• 10180503Sep 29, 2020Engine cooling. Revised Technical Service Letter for DD Heavy Duty Platform Belt Tensioner Change. A newly designed, dual-arm friction shoe damping tensioner was implemented for the DD Heavy Duty Platform. The revision includes additional information on retrofit and service kits.
• 10180459Sep 29, 2020Engine cooling. Tech Talk discussion on Aftertreatment System Problem Detected after performing D20M8 recall.
• 10180395Sep 29, 2020Electrical system, Brakes. Tech Talk discussion on ABS trailer code 520216 31 P4 New Cascadia.
• 10180562Sep 25, 2020Equipment, Electrical system. Customer Advisory Letter for New Cascadia 29A Battery Cable Relocation.
• 10180455Sep 24, 2020Engine cooling, Electrical system. Tech talk discussion on inaccurate reading DEF gauge.
• 10180454Sep 23, 2020Vehicle speed control, Lane departure. Tech Talk discussion on Detroit Assurance shutting down.
• 10180080Sep 23, 2020Electrical system, Equipment. Customer Letter explaining for certain vehicles the software updates for the CTP will require monitoring and may affect service availability.
• 10180350Sep 22, 2020Equipment, Steering. Tech Talk discussion about power steering fluid.
• 10180360Sep 18, 2020Equipment, Electrical system. Tech Talk discussion on New Cascadia front blower motor inoperative.
• 10180386Sep 17, 2020Equipment. Tech Talk discussion on CTP Update Issues
• 10179807Sep 17, 2020Engine cooling. Field Service Campaign for Freightliner Cascadia LG1 Radiator Inlet Hoses. The radiator and upper hose assembly have an alternate design available which may extend the life of the radiator hose and prevent leaking connectors.
• 10180593Sep 16, 2020Transmission and drivetrain, Engine cooling. Tech Talk discussion about Common Powertrain Controller(CPC) not configured to Cascadia
• 10180138Sep 16, 2020Electrical system, Equipment. Tech Talk discussion for P4 New Cascadia ICU display blank but gauges still work.
• 10180099Sep 16, 2020Electrical system, Equipment, Engine. Service Solution for Fault Code VRDU 524127/9 - Lost Communication with the MPC. This Service Solution has been superseded to service bulletins SB 54-336 and 54-329. Please see the service bulletins for the most current information. VRDU fault code 524127/9 is often caused by lack of ignition supply to the MPC, which causes it to stop communicating. This usually occurs when voltage is low.
• 10179886Sep 16, 2020Brakes. ConMet Hub Communication on rotor mounting studs installed on steer and drive hubs on vehicles with flat rotors may fracture due to hydrogen embrittlement. Inspection of vehicles may delay delivery of vehicles.
• 10179804Sep 16, 2020Electrical system. Freightliner Service Bulletin for Rewiring the MPC2 Camera Fuse. The multipurpose camera 2 (MPC2) power is supplied via fuse 14 (F14) in New Cascadia vehicles built before August 24, 2020. With this configuration, fault code 232/524127/9 - "Lost Communication to MPC" becomes active during low voltage disconnect (LVD) situations when load shedding is required to maintain critical systems.
• 10180382Sep 15, 2020Engine cooling. Tech Talk discussion on repair verification for codes like 'low air flow' when a trailer is not available.
• 10180434Sep 14, 2020Equipment. Tech talk discussion on Parksmart Fan Control.
• 10180379Sep 14, 2020Electrical system, Equipment. Tech Talk discussion on new Cascadia P4 ICU issue for clearing codes after updating.
• 10180380Sep 13, 2020Air bags. Tech Talk discussion on cab air bag mounts. Passenger side air bag leaning.
• 10179884Sep 11, 2020Brakes. Customer Advisory Letter for Inspection of ConMet Disc Brake Rotor to Hub Fastener. Our records indicate that you are the owner of certain vehicles and therefore DTNA is sharing the following documentation with you. Please see the attached instructions on inspecting the ConMet disc brake rotor to hub fastener.
• 10179872Sep 10, 2020Exterior lighting, Electrical system, Visibility (wipers, defrost, mirrors). Updated Freightliner Service Bulletin for Updated ULB Control Unit for LED Headlamps. This bulletin replaces the version dated July 30, 2020. Information about a reman part has been added. New Cascadia vehicles with light emitting diode (LED) headlamps built from January 1, 2017 through February 17, 2020 may experience intermittent disabled headlamps due to an issue with the universal light ballast (ULB). The LED…
• 10179865Sep 10, 2020Electrical system, Equipment. Updated Service Bulletin for Electrical Wall Chart and VPDM Cover on New Cascadia with Detroit Assurance 5.0 and Multi-Purpose Camera 2. This bulletin replaces the version dated 2/26/2020. Information about Service Bulletin 54-336 has been added.
• 10180397Sep 9, 2020Equipment. Tech talk discussion on P4 radio for 500k system.
• 10179887Sep 8, 2020Brakes. ConMet Disc Brake Communication for vehicles with flat rotor disc brakes with aluminum hubs may have rotor mounting studs fracture due to hydrogen embrittlement. A hold has been placed on vehicles at plants and facilities to inspect before releasing for delivery.
• 10179885Sep 8, 2020Brakes. ConMet Work Instructions for Inspection of ConMet Disc Brake Rotor to Hub Fastener. Please see the attached instructions on inspecting the ConMet disc brake rotor to hub fastener. Rotor mounting studs installed on steer and drive hubs on vehicles with flat rotors may fracture due to hydrogen embrittlement.
• 10179873Sep 7, 2020Electrical system. Freightliner Service Bulletin for Optional 30K High-Current Trailer Cord Circuit Breaker Replacement. New Cascadia vehicles manufactured from September 1, 2016 through June 28, 2020 with an optional high current single- or dual-pole trailer cord were equipped with an auto-reset type I circuit breaker mounted in the battery cable access (BCA) box.
• 10180426Sep 4, 2020Engine cooling, Electrical system. Tech Talk discussion on D20M8-A No updated CPCA software available.
• 10180410Sep 4, 2020Engine cooling. Tech Talk discussion on Possible new regen strategy on GHG 17.
• 10179881Sep 3, 2020Electrical system. Service Solution for New Cascadia Unintended 4-way Flashers Activation. As of 8/24/2020 SSAMs received an internal software change that cannot be updated in the field. The software change eliminates the unintended 4-way flasher activation issue documented in this solution. For P4 vehicles built before 8/24/2020 this solutions still applies.
• 10180351Sep 1, 2020Electrical system, Visibility (wipers, defrost, mirrors), Interior lighting. Tech Talk discussion for P4 Next Gen Cascadia dome lights stay on while driving.
• 10179249Aug 31, 2020Engine cooling, Electrical system, Equipment. Customer Service Announcement for Release of DiagnosticLink 8.12 Service Pack 2. On Thursday, September 3, 2020, Service Pack (SP) 2 for DiagnosticLink 8.12 Standard and Professional will be made available to download from the Detroit Diesel server.
• 10179155Aug 31, 2020Equipment. Service Solution for New Cascadia Bluetooth Microphone Relocation. Similar to Service Solution 1034680 which also informs about relocating the microphone.

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