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.

• 10179074Aug 27, 2020Steering, Wheels. Customer Advisory Letter for Visual Inspection For Oil Presence In Hub. Visual Inspection is necessary for the condition of the oil level in the steer axle hubs.
• 10179061Aug 26, 2020Engine cooling, Equipment. Important Campaign Information Letter informing that revised bulletins for Detroit Diesel campaigns D20R1REV1 and D20M8REV1 have been posted on DTNAConnect.
• 10179151Aug 25, 2020Equipment. Service Solution for P4 Cascadia Front HVAC Evaporator Freezing. Front evaporator freezes creating ice buildup, reducing airflow through the vents. The evaporator freezing condition is very hard or cannot be duplicated, in a repair facility. Because the condition is hard to duplicate, determining root cause is still under investigation.
• 10179054Aug 25, 2020Electrical system, Engine cooling. Revised Detroit Emissions Recall for Daimler Trucks North America LLC, on behalf of its Detroit Powertrain Division, has determined that some Model Year 2020 GHG21 DD13 engines require reprogramming of the MCM to meet certification. NOTE: Reference 20TS-04 Detroit CPC501T GHG21 Only; Bootloader Update if New Cascadia CPC501T is not at the software level shown in this table. The Corrective Procedure also has been…
• 10178948Aug 25, 2020Electrical system, Engine cooling. Revised Detroit Field Service Campaign for GHG17 & GHG21 Detroit DD13, DD15, and DD16 ACM Software Reprogramming. NOTE: Reference 20TS-04 – Detroit™ CPC501T GHG21 Only; Bootloader Update if New Cascadia CPC501T is not at the software level shown in this table.
• 10178946Aug 24, 2020Lane departure. Warranty Information Letter for Active Lane Assist Steering Column - Providing Serial Number During Claim Entry. The serial number for an ALA steering column is scanned at installation and displays in OWL on the Major Components screen. Effective for repairs performed on or after August 24, 2020, if a factory-installed ALA steering column is replaced due to a warrantable failure, the serial number will be required…
• 10179050Aug 17, 2020Electrical system. Detroit Emissions Recall for GHG21 Detroit DD13 Model Year 2020 Software Reprogramming. Daimler Trucks North America LLC, on behalf of its Detroit Powertrain Division, has determined that some Model Year 2020 GHG21 DD13 engines require reprogramming of the MCM to meet certification.
• 10178943Aug 14, 2020Equipment, Transmission and drivetrain. Updated Service Bulletin for DT12 Transmission Cooler Retrofit. This bulletin replaces the version dated 09/18/2019. The part number for the oil control valve has been updated in the parts table.
• 10179077Aug 13, 2020Equipment. Customer Advisory Letter for How to program the IPPC module using DiagnosticLink.
• 10179076Aug 11, 2020Brakes, Equipment. Revised Customer Advisory Letter for New Cascadia ABS Warning Light Illumination work instructions. Due to the enhanced vigilance of the New Cascadia ABS controller, some fault codes and indicator lights do not necessarily require immediate maintenance attention. DTNA and WABCO are currently jointly working on a long-term corrective plan for the condition. REVISED: This CAL replaces the CAL issued June 17th, 2020.
• 10178945Aug 11, 2020Equipment. Revised letter is to announce a reimbursement available to dealers for travel to a customer's location to perform a recall or field service campaign. Potential travel reimbursement applies to DTNA truck dealers and Detroit Diesel distributors. Thomas Built Buses will be addressed separately.
• 10178208Aug 7, 2020Body and structure. Freightliner Parts technical bulletin for Aftermarket Bumper Replacement. In order to reduce part proliferation, and maintain relevant stock in the Parts Distribution Center (PDC), service bumpers were created. While ordering a production bumper replacement, order one of the eight service bumpers from Table 1, and relevant interchangeable parts from Table 2 based on vehicle configuration.
• 10178215Aug 4, 2020Electrical system. Detroit Field Service Campaign for GHG17 & GHG21 Detroit DD13, DD15, and DD16 ACM Software Reprogramming
• 10178006Aug 3, 2020Equipment. Important Campaign Information letter announcing Dealer Travel for Campaign Performance. This letter is to announce a reimbursement available to dealers for travel to a customer’s location to perform a recall or field service campaign.
• 10177979Aug 3, 2020Equipment. Warranty Information Letter for OWL and Warranty Manual Improvement: Sublets and Travel Time/Distance. In the spirit of continuous improvement, DTNA reviewed sublet-related policies and procedures. The goal was to improve language clarity and optimize processes.
• 10177838Aug 3, 2020Equipment. Warranty Information Letter informing that to ensure that DTNA policies and service network practices align, the Warranty Department will be revising the Warranty Manual.
• 10177694Jul 30, 2020Electrical system. Freightliner Service Bulletin for In Rail Battery Box Cable Rub Repair. New Cascadia vehicles ordered with battery box data codes (282-014-BATTERY BOX[ES] MTD IN RL BOC or 29G-001-PLASTIC AUX BATT BOX MTD BTWN RLS) mounted on in rails at the back of the cab, have battery cables that are exposed to rubbing, which may result in excessive chaffing. Chaffing is observed more on the ground cable exiting the box…
• 10177693Jul 30, 2020Electrical system, Exterior lighting, Visibility (wipers, defrost, mirrors). Freightliner Service Bulletin for Updated ULB Control Unit for LED Headlamps. 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 headlamps can turn off if the supply voltage drops below approximately 9V.
• 10177606Jul 30, 2020Brakes. Freightliner Service Bulletin for Meritor Steer Axle Drum Brake Squeal. Some Cascadia and New Cascadia vehicles equipped with Meritor steer axle drum brakes with a front axle rating less than 13,300 lb (6038 kg) have experienced brake squealing noise when the service brakes are applied at lower speeds. NOTE: This is a nuisance noise issue and not a failure. The solution given in this service bulletin may fix this…
• 10177672Jul 28, 2020Electrical system, Exterior lighting. Service Bulletin for Installing a Fog Lamp Backshell. The connector that attaches to the fog lamp is exposed to water spray from the front tires. Even though the connector is sealed, water spray, in addition to wiring that may be pulled sideways, can cause water intrusion into the connector. A backshell can be added to the connector to provide shielding from direct water spray. It also provides strain relief for…
• 10177692Jul 27, 2020Engine cooling. Technical Service Letter for EPA10, GHG14, GHG17 Diesel Particulate Filter (DPF) Compatibility. Note: This document supersedes 14 TS-25 and 15 TS-8. Detroit Diesel has determined that some, Diesel Particulate Filters (DPFs) are compatible in pairs and or can be mixed together within EPA10 and GHG14 Systems. For 1-BOX and Two-Box Configuration Aftertreatment Systems (ATS), this is only possible when the filters are…
• 10177691Jul 27, 2020Engine cooling. OEM and distributor announcement for DiagnosticLink 8.12 (Build 4527) was made available. All DTNA Service shops & OEM locations are required to maintain the latest version of software on each of their stations.
• 10177690Jul 27, 2020Engine cooling. Customer Service Announcement informing that Service Pack (SP) 1 for DiagnosticLink® 8.12 Standard and Professional is available to download from the Detroit Diesel server.
• 10177657Jul 23, 2020Engine cooling. Customer Service Announcement for DiagnosticLink Software Update Reminder. Due to various software changes and fixes, vehicles will require DiagnosticLink 8.12 to perform functional programming. Failure to use this version may cause errors, incomplete programming, and poor vehicle performance. Because of this, all DiagnosticLink 8.09 installed versions will be disabled as of Thursday, July 23, 2020.
• 10177646Jul 23, 2020Visibility (wipers, defrost, mirrors). Service Bulletin for Reflective Tape Installation. If a truck tractor is ordered without mudflaps and/or mudflap support brackets, the rear reflective tape applied to the mudflaps or mudflap brackets during production is delivered loose with the vehicle. FMVSS/CMVSS 108 S5.7.1.4.3 requires reflective tape on all truck tractors domiciled in the United States and Canada.
• 10177654Jul 17, 2020Equipment, Visibility (wipers, defrost, mirrors). Service Solution for New Cascadia Window Regulator Motor Stop Working. The window regulators motors are not designed to be run continuously. The window regulator motors have a thermal cutoff. If they are run long enough, there will eventually be an open circuit and get a fault code.
• 10177650Jul 16, 2020Equipment. 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.
• 10177648Jul 10, 2020Body and structure. Service Bulletin for Guidelines for Cleaning and Disinfecting Cab Surfaces. The following guidelines are for cleaning and disinfecting commonly touched surfaces on the inside and outside of a vehicle. For best results, follow cleaning and disinfecting procedures fully and consistently. Ensure there is adequate ventilation when using chemicals. NOTICE: Wipe down fragile components carefully to avoid damaging the…
• 10176999Jul 1, 2020Transmission and drivetrain. Updated Service Bulletin for Eaton-Cummins Endurant Transmission. This bulletin replaces the version dated 05/18/2020. The link to the transmission service information has been updated. A new line of transmissions will be available in the Freightliner vehicles at the beginning of April 2020. The Eaton-Cummins Endurant is a manual transmission that uses compressed air for shifting and clutch actuation.
• 10177001Jun 29, 2020Engine cooling. Freightliner Service Bulletin for Compressor Bracket Modification to Reduce Harness Chafing. New Cascadia vehicles with Detroit HDEP engines may experience engine harness chafing at the harness support bracket that mounts on the air compressor. To avoid this issue, a new hole is drilled on the bracket to enhance the spacing with tie straps and reduce harness contact with the mounting bolt. Additional harness…
• 10176789Jun 25, 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.
• 10176745Jun 25, 2020Brakes. Customer Advisory Letter for New Cascadia ABS Warning Light Illumination work instructions. Due to the enhanced vigilance of the New Cascadia ABS controller, some fault codes and indicator lights do not necessarily require immediate maintenance attention. DTNA and WABCO are currently jointly working on a long-term corrective plan for the condition.
• 10176744Jun 25, 2020Brakes. Customer Advisory Letter for Antilock Brake System (ABS) Modulator Valve Replacement work instructions.
• 10176743Jun 25, 2020Brakes. Customer Advisory Letter for ABS Modulator Valve Replacement. Provides additional information as announced in CALABSMODVALVE communication.
• 10176741Jun 25, 2020Electrical system. Service Solution for CTP Reset Warning When Using DiagnosticLink Version 8.12. Starting with DiagnosticLink version 8.12, a new Common Telematics Platform (cTP) Not Communicating Over the Air symptom based Advanced Diagnostic procedure was released with the intent to resolve specific issues on a certain population of trucks. Please, do not run this procedure unless specifically directed by a DTNA field service…
• 10176737Jun 25, 2020Engine cooling. Detroit Field Service campaign for DETROIT Export DD15 and DD13 Valve Lash Adjustment, Throttle Connector O-ring, and TC Air Line Spacer Installation.
• 10176279Jun 12, 2020Equipment. Service Bulletin for Wear Pad Installation. The area of the floor mat near the throttle pedal is more prone to wear. To extend the life of a floor mat, a wear pad can be installed on it near the throttle and brake pedal area.
• 10176790Jun 10, 2020Engine cooling. Customer Service Announcement for Release of DiagnosticLink 8.12. On Wednesday, June 10, 2020, DiagnosticLink 8.12 will be made available for download from the ordering system. Current subscribers of DiagnosticLink 8.xx can upgrade to DiagnosticLink 8.12 at no cost. All DTNA service shops are required to maintain the latest version of software on each of their stations.
• 10176258Jun 10, 2020Engine cooling. Warranty Information Letter for a Warranty Service Replacement Engine Program Clarification. Detroit established the Warranty Service Replacement Engine Program to support an unrepairable catastrophic engine failure due to manufacturing defect. To improve understanding and utilization of the program, DTNA is clarifying eligibility and engine returns.
• 10194446May 22, 2020Brakes. Customer Advisory Letter on New Cascadia ABS Fault Codes 520216/31 and 629/11
• 10175415May 22, 2020Equipment. 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.
• 10175414May 22, 2020Fuel system, Engine cooling. Service Bulletin for Remote-Fill DEF Tank Fill Port Torque Value and Required Lubricant. Some New Cascadia vehicles with chassis fairings have remote-fill Diesel Exhaust Fluid (DEF) tanks which have new instructions to replace the remote fill hose and fitting. Proper torque value is critical, as the remote-fill fittings are plastic and can easily crack if overtightened. The gasket on the fill fitting is sensitive…
• 10175411May 22, 2020Steering, Equipment. Customer Advisory Letter for Walmart for Draglink Inspection. Walmart to inspect the draglink for a loose castlenut at the steering arm connection point.
• 10175356May 20, 2020Equipment. Customer Advisory Letter for Incorrect Horsepower Rating. Affected vehicles will have their MCM reprogrammed.
• 10175355May 20, 2020Equipment, Transmission and drivetrain. Service Bulletin for Eaton-Cummins Endurant Transmission. A new line of transmissions will be available in the Freightliner vehicles at the beginning of April 2020. The Eaton-Cummins Endurant is a manual transmission that uses compressed air for shifting and clutch actuation. It also requires a specific clutch assembly that is different than the current Eaton product line.
• 10193886May 19, 2020Other or unknown. Freightliner Action Bulletin FAB250 cascadia sales data bo-2020-07-02
• 10174987May 13, 2020Brakes. Customer Advisory Letter for ABS Modulator Valve Replacement. DTNA has decided to remove and replace the ABS modulator valves as part of an ongoing supplier quality study.
• 10193885May 1, 2020Other or unknown. Freightliner Action Bulletin FAB249 cascadia adr dealer bu-2020-07-02
• 10174398Apr 29, 2020Exterior lighting. Service Bulletin for Marker Light Gasket Leaks, New Cascadia. This bulletin replaces the version dated June 17,2019. A procedure has been added for inspection, repair, and replacement of damaged or spun rivet nuts.
• 10174376Apr 27, 2020Equipment. Warranty Information Letter for Warranty Training Online. DTNA is pleased to announce the release of new Warranty-related training videos. The videos provide Warranty content in short instructional videos that are available on demand through the AftermarkeTV Video Channel icon on the Aftermarket Resource Center (ARC) home page.

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