2020 Freightliner Cascadia Technical Service Bulletins

661 technical service bulletins (TSBs) are on record for the 2020 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.

• 10200620Jun 2, 2021Forward collision avoidance. Freightliner Service Bulletin for Detroit Assurance 4.0 Software v20.05. Cascadia trucks built from January 1, 2017 through September 9, 2019 and equipped with Detroit Assurance correctly initiate an active brake assist (ABA) event when a vehicle or obstacle is detected in front of the truck. Some of those trucks may continue decelerating to a complete stop, even after the vehicle or obstacle detected in front of…
• 10198593Jun 1, 2021Forward collision avoidance, Engine cooling. Freightliner Service Bulletin for Detroit Assurance 4.0 Software v20.05. New Cascadia trucks built from January 1, 2017 through September 9, 2019 and equipped with Detroit Assurance correctly initiate an active brake assist (ABA) event when a vehicle or obstacle is detected in front of the truck. Some of those trucks may continue decelerating to a complete stop, even after the vehicle or obstacle detected in front…
• 10194883May 26, 2021Other or unknown. Tech Talk Discussion SPN 520981 FMI 5 HOOD TILT SWITCH CURRENT BELOW NORMAL OR OPEN CIRCUIT
• 10194829May 14, 2021Electrical system, Engine cooling. Tech Talk discussion on J1939 datalink failure codes.
• 10194477May 12, 2021Brakes, Equipment. Customer Advisory Letter for Drive Axle Drum Brake S-Cam U-Bolt Replacement.
• 10194869May 10, 2021Electrical system, Electronic stability control, Brakes. Tech Talk Discussion P4 New Cascadia ABS Fault Code 520247/31 - Failure Memory Bit (ESC) Condition Exists
• 10199391May 1, 2021Suspension. Freightliner Action Bulletin FAB286 Cascadia Rear Suspension Ride Height
• 10191778Apr 28, 2021Electrical system, Equipment, Engine cooling. Tech Talk continuing discussion on CGW lost communication with cpc.
• 10200624Apr 27, 2021Visibility (wipers, defrost, mirrors). Freightliner Service Bulletin for Auxiliary Mirror Vibration. Cascadia trucks built from January 1, 2017 through June 16, 2020 may be equipped with auxiliary mirrors that vibrate or wobble. A service kit (part number 22-77791-500) is available to resolve the issue.
• 10190985Apr 26, 2021Visibility (wipers, defrost, mirrors). Updated Freightliner Service Bulletin for Adjusting Automatic Temperature Control Range with Optimized Idle. This bulletin replaces the version dated 12/06/2019. Tables 3 and 4 have been updated. Steps to change and match HVAC desired settings have been updated.
• 10191862Apr 23, 2021Brakes. Tech Talk discussion on DT12 Countershaft Brake Learn Dynamic Values.
• 10191150Apr 23, 2021Visibility (wipers, defrost, mirrors). Service Solution for P4 Main Mirror Arm Covers Loose - Falling Off. Lower arm cover designs have clips that hold the cover on but over time the clips can fail and allow the covers to become loose or fall off.
• 10191149Apr 23, 2021Transmission and drivetrain. Service Solution for FTL DT12 Trans Control Harness Chaffing - PT Can faults. Transmission will not shift into Gear while driving or will not start and trigger multiple PT CAN Fault Codes.
• 10191146Apr 23, 2021Tires. Customer Advisory Letter for Tire Valve Stem Inspection.
• 10190554Apr 23, 2021Electrical system. Customer Advisory Letter for Battery Cable Access (BCA) 29A Cable Inspection.
• 10191143Apr 19, 2021Transmission and drivetrain. Detroit Field Service Campaign for DT12 Transmission Drive Shaft Cover Plug Reseal. Daimler Trucks North America LLC, on behalf of its DETROIT Powertrain Division, is initiating Field Service Campaign D21M1 on certain DT12 transmissions in order to reseal the bypass plugs of the drive shaft cover located in front housing.
• 10190551Apr 19, 2021Engine cooling. Warranty Information letter announcing that DTNA is increasing the Standard Diagnostic Times (SDTs) shown. The updated after treatment system (ATS) diesel exhaust fluid (DEF) pump times will be applied to repair orders opened on or after April 12, 2021.
• 10191830Apr 8, 2021Brakes, Electrical system. Tech Talk discussion on P4 New Cascadia ABS Fault Code 520247 31 --Failure Memory Bit (ESC) Condition Exists.
• 10191695Apr 8, 2021Brakes, Electrical system. Tech Talk discussion on Cascadia glider issues.
• 10190549Apr 6, 2021Equipment. Warranty Information Letter announcing DTNA is adjusting the Standard Repair Times (SRTs) shown. The updated times will be applied to repair orders opened on or after April 5, 2021.
• 10189622Mar 31, 2021Equipment. Field Service Campaign for Freightliner Cascadia RHD Key Fob - Export Only. The Regulatory Compliance Marking (RCM) was not implemented on the Key Fobs shipped to the Australian/New Zealand Market, as required by AS/NZS 4417.1 and 4417.2. The marking indicates component compliance with the requirements imposed or covered by these regulations.
• 10189616Mar 30, 2021Engine cooling. Field Service Campaign for Cascadia Cummins Natural Gas Engine Exhaust Shield. On certain vehicles, there may be early heat degradation at the front right cab mount due to excessive heat exposure. An exhaust shield will be installed on all vehicles involved.
• 10201997Mar 29, 2021Equipment. DetroitConnect customer communication for certain vehicles unable to complete over the air updates including parameters and DDEC over the air.
• 10189340Mar 24, 2021Equipment. Updated Freightliner Service Bulletin for Espar Service Information. This bulletin replaces the version dated January 1, 2015. New Cascadia has been added to the model list.
• 10198592Mar 23, 2021Visibility (wipers, defrost, mirrors). Updated Freightliner Service Bulletin for Updating HVAC ECU Software to Fix Front HVAC Evaporator Freezing and Improve Espar Heater Cool Down. This bulletin replaces the version dated 03/03/2021. Information on software versions and the number of software updates needed has been updated.
• 10189319Mar 22, 2021Electrical system, Equipment. Warranty Policy Letter for battery tags. DTNA determined that since adopting the AutoMeter BCT-460DTNA Powernet Assessment Tool (AutoMeter) as the required powernet system tester, not all battery tags have to be retained support Warranty-related claims.
• 10189338Mar 19, 2021Electrical system. Service Solution for New Cascadia Maintenance Indicator Issues. Some customers have reported incorrect or undesired pop up messages occurring in the ICC5 display and have requested field correction.
• 10189337Mar 19, 2021Lane departure, Electrical system. Service Solution for P4 New Cascadia Side Guard Radar Harness Moisture Intrusion. The 6-pin connector located at the side radar can show signs of water intrusion if wires are strained at the connector. Wires without strain relief can allow water to intrude past the seals, resulting in corrosion on the terminals and pins within the connector. Active fault codes for lost communication with RDU and SRRM, plus other…
• 10189342Mar 17, 2021Brakes. Revised Customer Advisory Letter for ABS Warning Light Illumination with ABS code SA 11, SPN 629, FMI 11. REVISED: This CAL revises the CAL issued August 10th, 2020. Western Star 49X vehicles have been added to the CAL scope and instructions for downloading and installing software to address the ABS warning light illumination with ABS code SA 11, SPN 629, FMI 11 have replaced the corrective action of the previous…
• 10189880Mar 16, 2021Electrical system. Tech Talk discussion on central gateway (CGW) location.
• 10189348Mar 16, 2021Transmission and drivetrain. Detroit Field Service Campaign for DT12 Gear Grind During Downshift Software Update.
• 10189320Mar 16, 2021Engine cooling. Revised Freightliner Service Bulletin for netized Fill Neck for Six-Gallon DEF Tanks. A design change removed the magnets from the fill necks for some 6-gallon diesel exhaust fluid (DEF) tanks. If the vehicle is equipped with a non-magnetic fill neck 04-32529-000, it can be updated to a magnetic neck 04-32529-001. This bulletin replaces the version dated 04/18/2017. Updated availability of magnetic fill neck option…
• 10189334Mar 12, 2021Electrical system, Wheels. Updated Freightliner Service Bulletin for Tire Pressure Monitoring System (TPMS) Water Intrusion. This bulletin replaces the bulletin dated 02/08/2021. The location for the date stamp has changed. A note has been added to Fig. 2.
• 10190020Mar 10, 2021Equipment, Transmission and drivetrain. DTNA received a field notification on multiple units regarding diagnostic fault codes that were found to be causing issues to the After Treatment Control Module (ACM). These fault codes indicated that the ACM communication message was not received by the Motor Control Module (MCM) which in certain cases, led to a 25% engine de-rate situation. Further diagnosis revealed that the DT12 wiring harness was chafing and…
• 10189971Mar 9, 2021Engine cooling, Transmission and drivetrain. Tech Talk continuing discussion on SCR conversion codes only when bobtailing.
• 10189346Mar 5, 2021Electrical system. Customer Advisory Letter for Disabling the Park Brake Drag ICU Warning Message.
• 10189321Mar 4, 2021Equipment. Revised Freightliner Service Bulletin for New Cascadia Key Fob ID Retention. This bulletin replaces the version dated 8/15/2018. The guidance for locating the serial number for key fobs has changed. It is no longer necessary to document the serial number in PartsPro.
• 10189331Mar 3, 2021Visibility (wipers, defrost, mirrors), Equipment. Revised Freightliner Service Bulletin for Updating HVAC ECU Software to Fix Front HVAC Evaporator Freezing and Improve Espar Heater Cool Down. This bulletin replaces the version dated 12/23/2020. Information has been added about ParkSmart units and the instructions have been streamlined.
• 10189341Mar 1, 2021Other or unknown. Revised Customer Advisory Letter for Cascadia, New Cascadia, and 122SD Vehicles with Cracked Fifth Wheel Angles. Additional photos have been added.
• 10187532Feb 25, 2021Equipment, Engine cooling. Freightliner Service Bulletin for Programming Chassis Electronic Control Units (ECUs) With DiagnosticLink.
• 10187594Feb 24, 2021Equipment, Other or unknown. Customer Advisory Letter for Cascadia, New Cascadia, and 122SD Vehicles with Cracked Fifth Wheel Angles
• 10187596Feb 23, 2021Equipment, Steering. Customer Advisory Letter for New Cascadia Front Steer Arm – Drag Link Ball Joint Connection Inspection.
• 10187595Feb 23, 2021Equipment, Steering. Customer Advisory Letter for New Cascadia Front Steer Arm – Drag Link Ball Joint Connection Inspection.
• 10187997Feb 21, 2021Visibility (wipers, defrost, mirrors). Tech Talk discussion on P4 WASHER FLUID LOW WARNING WITH NO SWITCH.
• 10187836Feb 19, 2021Engine cooling. Technical Service Letter for Gen 5 DD15 Instrument Panel Oil Pressure Gauge Operation. Gen 5 DD15 equipped units have been brought in for service with a complaint of the instrument panel oil pressure gauge not moving during unit operation and/or stuck at 50PSI. The instrument panel oil pressure gauge does not operate the same as with previous engine models. Please be advised, this is normal operation and no further…
• 10187835Feb 19, 2021Engine cooling. Starting on November 23, 2020, DiagnosticLink 8.13 (Build 4527) was made available. Current subscribers of DiagnosticLink 8.11 or 8.12 may upgrade to DiagnosticLink 8.13 at no cost. All DTNA Service shops & OEM locations are required to maintain the latest version of software on each of their stations.
• 10187833Feb 19, 2021Engine cooling. Revised Technical Service Letter for Cold Weather Faults on GHG17/21 DD13 with MCM Software Version 14. Due to colder weather, there may be an increase in the frequency of faults, noted below, on GHG17/21 DD13 trucks built after June 5th 2019. This is due to a calibration issue in the current MCM software (14.1.1.5 or 14.2.1.3). New software is scheduled for release in the first quarter of 2021 that will address…
• 10187933Feb 18, 2021Exterior lighting. Tech Talk discussion on P4-Next Gen Cascadia Headlights.
• 10188001Feb 17, 2021Brakes. Tech Talk discussion on P4 Cascadia ABS code SPN 520213 FMI 31.
• 10188113Feb 16, 2021Engine cooling. Tech Talk discussion on scr conversion codes only when bobtailing.

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