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.

• 10187844Feb 16, 2021Electrical system, Exterior lighting, Visibility (wipers, defrost, mirrors). Customer Maintenance Enhancements for the P4 Halogen Lamp replacement procedure.
• 10187524Feb 15, 2021Equipment. Superseding Letter to an Important Campaign Information Letter 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. This letter supersedes ICI20-022R.
• 10187444Feb 15, 2021Equipment, Engine cooling, Electrical system. Warranty Information Letter for Detroit NOx Sensor Circuit Fault Codes - Claim Guidelines.
• 10187928Feb 14, 2021Electrical system, Visibility (wipers, defrost, mirrors). Tech Talk continued discussion for P4 Next Gen Cascadia dome lights stay on while driving.
• 10188109Feb 13, 2021Equipment, Electrical system. Tech Talk discussion on Radio issue while in AM mode and inverter on.
• 10187942Feb 11, 2021Engine cooling. Tech Talk discussion on P4 cascadia codes 3597 4 & 5741 13 only active with key off
• 10188122Feb 10, 2021Engine cooling. Tech Talk discussion on D20M8 having updates greater than Recall requires in server.
• 10187600Feb 10, 2021Electrical system. Service Solution for P4 New Cascadia Unintended Dome Lamp Activation Due To Poor Connections at the sSAM.
• 10187543Feb 9, 2021Electrical system, Tires. Freightliner Service Bulletin for Tire Pressure Monitoring System (TPMS) Water Intrusion.
• 10187440Feb 8, 2021Equipment. Revised 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. Revisions are in blue font.
• 10187551Feb 4, 2021Brakes. Field Service Campaign for Cascadia Road Train Brake System - Export Only.
• 10187599Feb 2, 2021Seat belts. Service Solution for New Cascadia Seat Belt Warning Harness Routing
• 10186405Feb 2, 2021Electrical system. Tech Talk discussion regarding the refrigerator power supply when the ignition is off.
• 10187900Feb 1, 2021Transmission and drivetrain, Engine cooling. Warranty Information Letter for Detroit Resources: Exploded View DD Platform and DT12 Posters. Detroit's TechComm team created visual aids for the network and released exploded view posters for DD platform engines. In early 2021, Detroit added multiple DT12 posters.
• 10187877Feb 1, 2021Visibility (wipers, defrost, mirrors). Tech Talk continued discussion on New Cascadia wipers unresponsive. Wipers don't work in the first two positions. Determined to be the LDW camera wire was caught underneath the top right portion of the windshield mounting plate, thus causing the rain/light sensor to not seat all the way against the windshield.
• 10186540Feb 1, 2021Visibility (wipers, defrost, mirrors). Tech Talk continued discussion on New Cascadia wipers unresponsive. Wipers don't work in the first two positions. Determined to be the LDW camera wire was caught underneath the top right portion of the windshield mounting plate, thus causing the rain/light sensor to not seat all the way against the windshield.
• 10186531Feb 1, 2021Engine cooling. Tech Talk discussion on Possible new regen strategy on GHG 17.
• 10186550Jan 31, 2021Transmission and drivetrain, Electrical system, Engine cooling. Tech Talk discussion on Cummins ISX fault 5865.
• 10185961Jan 26, 2021Electrical system, Engine cooling. Superseded Service Solution for New Cascadia P4 Coolant Level Wiring Damage. Fault codes can be generated if wiring to the coolant level sensor becomes damaged. This Service Solution has been superseded to service bulletin SB 54-337. Please see the service bulletin for the most current information.
• 10185895Jan 25, 2021Equipment, Electrical system. Freightliner Service Bulletin for Rain/Light Sensor Removal. On New Cascadia vehicles, a delay in the timing of communication (hand shake) between the rain/light sensor (RLS) and sSAM generates fault code "33/521940/12 - rain/light sensor - general DTC timeout", which causes the sensor to stop working.
• 10186640Jan 20, 2021Lane departure, Forward collision avoidance. Tech talk discussion on P4 throwing warning lights in heavy rain possible Radar.
• 10185690Jan 20, 2021Body and structure. Freightliner Service Bulletin for Replacement Cab Doors with Pre-Drilled Holes. Replacement doors for New Cascadia vehicles are now pre-drilled with two holes for the installation of turning vanes. If turning vanes are not installed, the pre-drilled holes need to be plugged with ratchet fasteners.
• 10185689Jan 20, 2021Transmission and drivetrain. Freightliner Service Bulletin for Updating the Programming of the Integrative Predictive Powertrain Control (IPPC) Module. The integrative predictive powertrain control (IPPC) module programming should be updated to the newest software. If the ignition short-cycles on these vehicles with the previous software, there is a risk that the IPPC module will not have time to write EEPROM data in the controller.
• 10185688Jan 20, 2021Engine cooling, Electrical system. Freightliner Service Bulletin for Coolant Level Sensor Wiring Repair. On New Cascadia vehicles, depending on the tension applied to the harness located at the coolant level sensor and its mounting locations, wiring damage can occur, resulting in one or more of the below listed fault codes.
• 10186637Jan 19, 2021Electrical system, Engine cooling, Equipment. Tech Talk discussion on cgw lost communication with cpc.
• 10185896Jan 17, 2021Engine cooling, Equipment. Warranty Information Letter for Detroit New Service Replacement Engine SRT Update. While validating Standard Repair Times (SRTs) for Detroit's new Gen 5 engine series, DTNA discovered an error in a pre-Gen 5 SRT for the New Service Replacement Engine Program. As a result, DTNA re-studied the SRT and concluded that time for removing/re-installing multiple components (e.g., exhaust manifold/turbo, engine sensor…
• 10186568Jan 15, 2021Latches, locks and linkages. Tech talk continued discussion on KEYLESS ENTRY FOB programming.
• 10186591Jan 7, 2021Transmission and drivetrain. Tech Talk discussion on LX6087 Rear axle oil change fluid type.
• 10186536Jan 6, 2021Transmission and drivetrain, Electrical system, Engine cooling. Tech Talk discussion on Modules not powering up after being jumped.
• 10185899Jan 5, 2021Equipment, Engine cooling. This Service Solution has been superseded by Service Bulletin SB54-338. Service Solution for P4 Cascadia Front HVAC Evaporator Freezing. Front evaporator freezes creating ice buildup, reducing airflow through the vents.
• 10184875Dec 31, 2020Engine cooling. Tech Talk continuing discussion on Optimized Idle batteries dying.
• 10184897Dec 29, 2020Visibility (wipers, defrost, mirrors). Tech Talk continued discussion on New Cascadia wipers unresponsive. Wipers don't work in the first two positions. Determined to be the LDW camera wire was caught underneath the top right portion of the windshield mounting plate, thus causing the rain/light sensor to not seat all the way against the windshield.
• 10184869Dec 29, 2020Visibility (wipers, defrost, mirrors), Equipment. Freightliner Service Bulletin for Front HVAC Evaporator Freezing and Espar Heater Cool Down Algorithm. New Cascadia vehicles with sleeper cabs may become extremely cold when in A/C mode, which can lead to reduced airflow as a result of internal ice buildup at the evaporator. Durability of the Espar D5 heater system when paired with the battery parked HVAC system (BPHS) can be improved by applying "cool down"…
• 10184901Dec 24, 2020Wheels, Electronic stability control. Tech Talk discussion on 2020 P4 COMPLAINT IS THAT TRACTION CONTROL LIGHT COMES ON.
• 10184785Dec 23, 2020Transmission and drivetrain. Revised Freightliner Service Bulletin for Axle Flange Gasket Replaced with O-Ring. Revision removed steps instructing removal and installation of wheels. 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.
• 10184928Dec 22, 2020Exterior lighting, Electrical system. Tech Talk discussion on trailer lights fuse.
• 10184895Dec 22, 2020Brakes. Tech Talk discussion on New Cascadia "low air pressure" warning light.
• 10184920Dec 17, 2020Visibility (wipers, defrost, mirrors). Tech Talk discussion on rookie mirror falling out.
• 10184919Dec 17, 2020Fuel system. Tech Talk discussion on metal in fuel.
• 10184655Dec 17, 2020Brakes. Freightliner Service Bulletin for Access to Front Brake Zerk Fittings. Certain vehicles with Detroit front axles and Meritor EX-L front air disc brakes do not have access to the front brake zerk fittings for lubrication.
• 10184924Dec 14, 2020Lane departure, Forward collision avoidance. Tech Talk discussion on collision system audible warning sound not working.
• 10184872Dec 14, 2020Electrical system. Service Solution for flickering overhead reading light during slight movement of the steering wheel for New Cascadia with DR 40SI alternators, possibly other alternators as well. The flickering overhead light is considered a nuisance, and can be simply eliminated by either adding an accessory to one of the power receptacles, or running an additional ground in one of the sleeper bunk lamps to suppress the ripples on…
• 10184035Dec 11, 2020Equipment. Service Bulletin for Pana-Pacific DEA505 Radio Reprogramming. On right-hand drive New Cascadia vehicles built before September 28, 2020, incompatible radio software can cause the Pana-Pacific DEA505 radios (A22-76228-000) to send the Bluetooth audio to the left-hand door speaker.
• 10184029Dec 8, 2020Steering, Transmission and drivetrain. Revised Warranty Policy Letter for Alliance/Mascot Aftermarket Warranty and Claim Filing. Revisions are in blue. With Mascot now in partnership with Detroit Reman and Alliance Parts, DTNA is pleased to announce that Mascot coverage has been added to OWL. Remanufactured Alliance/Mascot parts include transmission, differential, steering gear, and steering pump used in an on-highway vehicle applications.
• 10183988Dec 7, 2020Equipment, Steering, Transmission and drivetrain. Warranty Policy Letter for Alliance/Mascot Aftermarket Warranty and Claim Filing. With Mascot now in partnership with Detroit Reman and Alliance Parts, DTNA is pleased to announce that Mascot coverage has been added to OWL. Remanufactured Alliance/Mascot parts include transmission, differential, steering gear, and steering pump used in an on-highway vehicle applications.
• 10183733Dec 6, 2020Engine cooling. Technical Service Letter for SPN 3711 FMI 31 on GHG17 DD15 Trucks.
• 10184903Dec 4, 2020Equipment, Latches, locks and linkages. Tech Talk discussion on KEYLESS ENTRY KEY FOB programming.
• 10183954Nov 30, 2020Engine cooling, Equipment, Fuel system. Special Publication letter for Two-Filter Fuel System KM59 GEN1 DD15 DD16 Severe Duty High Pressure Fuel Rail Feed Lines Service Kit.
• 10183735Nov 30, 2020Transmission and drivetrain. Revised Service Bulletin for DT12 PTO Upfit. This bulletin replaces the version dated 09/13/2019. DDCSN and Power Service Literature references have been removed.
• 10183445Nov 25, 2020Equipment, Electrical system, Visibility (wipers, defrost, mirrors). Tech Talk discussion on P4 NEW CASCADIA AUX HVAC BLOWER TURN ON

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