2020 Freightliner Business Class M2 Technical Service Bulletins

254 technical service bulletins (TSBs) are on record for the 2020 Freightliner Business Class M2. 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.

• 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.
• 10177647Jul 24, 2020Electrical system, Exterior lighting. Service Bulletin for Front Lighting Ground Splice Pack Failure. The left and right hood lighting of these vehicles have separate ground paths to the frame and use the same splice pack parts. The splice packs are part of the hood commodity and located near the headlight assemblies. These splice packs can fail, resulting in either the left or right lighting becoming intermittent or inoperative.
• 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.
• 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…
• 10177000Jun 29, 2020Transmission and drivetrain. Freightliner Service Bulletin for Rerouting Wiring Harness to Reduce Chafing. Allison transmission wiring harness chafing causes disruption to gear engagement and fault code generation. To reduce chafing, the wiring is routed using stand off brackets and tie straps to minimize contact with the transmission parts. This bulletin applies to vehicles equipped with on-board diagnostics (OBDs) manufactured after 2016.
• 10177002Jun 26, 2020Exterior lighting, Electrical system. Field Service Campaign for LED Step Lighting. The frontwall harness that controls the LED step lighting is wired incorrectly. The frontwall harness will be repinned.
• 10176791Jun 25, 2020Engine cooling. OEM and distributor announcement for Running Change to ACM Software for MY2020. There is an upcoming running change (RC1) for ACM software that will be installed when OEMs or distributors program with DiagnosticLink. The hardware part number for the ACM module will remain the same (A 000 446 97 54). OEMs are instructed to continue ordering the same ACM hardware part number.
• 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.
• 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.
• 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.
• 10174984May 13, 2020Transmission and drivetrain, Engine cooling. Field Service Campaign for Allison Transmission Flex Plate Bolts. On certain vehicles with DD13 engines, incorrect bolts were installed in the flex plate. The flex plate bolts will be replaced.
• 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.
• 10174061Apr 23, 2020Equipment. Warranty Policy Letter for Chassis Progressive Damage Policy Change. Effective for repair orders opened on or after April 27, 2020, if an Authorized Service Location installed a part which later has a warrantable failure, progressive damage and labor may be covered under the Aftermarket Parts Limited Parts Warranty (Parts Warranty).
• 10174060Apr 23, 2020Equipment. Warranty Policy Letter for Handling for Authorized Service Location Part Transfers. To promote 24-hour throughput and maximum efficiency, DTNA is adjusting multiple handling policies: Launching a new handling allowance for parts ordered from another Authorized Service Location because the facing Part Distribution Center (PDC) is out of stock Retiring Detroit's Customer First Program
• 10174052Apr 22, 2020Equipment. Warranty Policy Letter for Handling Change: Over the Counter Aftermarket Parts Replacement Program. DTNA is pleased to announce that handling will increase to 33% for Misc. Replacement Part type claims filed under the Over the Counter (OTC) Aftermarket Parts Replacement Program.
• 10173907Apr 21, 2020Equipment, Engine cooling. Warranty Information Letter for Warranty Long Block Program Change. The Detroit Reman Long Block Program has expanded. The expansion reduces complexity in ordering reman engines and promotes stocking reman engines to meet uptime commitments.
• 10173899Apr 17, 2020Suspension, Body and structure. Customer Advisory Letter revision for 80KSI Frame Reinforcement Installation for certain vehicles equipped with 80KSI frame rails and Airliner 21,000LB rear suspensions. This version adds Model Year 2020.
• 10173894Apr 17, 2020Back-over prevention (rear camera), Electrical system. Service Bulletin for Lengthening the Backup Light Harness. Though the backup light harness is long enough to connect to the backup light switch, it may be short enough that the wire seals in the connector can be stressed. Moisture entering through the seals can cause corrosion, resulting in a bad connection and/or failure of the switch. As a result, backup lights and, if equipped, the backup alarm, may not function…
• 10173645Apr 8, 2020Wheels, Tires. Customer Advisory Letter for GWR Label Correction. Freightliner 108SD/114SD, Coronado, New Cascadia, and Business Class M2 vehicles and Western Star 4700 and 4900 vehicles equipped with a certain tire rating have the wrong Component GWR label. DTNA is requesting the current Component GWR label be replaced with the correct label.
• 10172974Mar 30, 2020Suspension. Freightliner Service Bulletin for Front Axle Spacer Replacement. This service bulletin replaces the version dated 05/01/2016. This bulletin is updated to include the parts list. Some vehicles may exhibit a lean (right or left) due to weight difference on the front suspension. While this does not affect the operation of the vehicle, it may be visually unpleasing to many customers. To correct this condition, replace…
• 10172739Mar 23, 2020Engine cooling. Service Information Bulletin for Cylinder Block Porosity Repair for DD5 and DD8 egnines. Use this procedure to repair oil leaks caused by cylinder block porosity. The low oil pressure, cast areas of the cylinder block can be repaired using this method. J-B Weld is the recommended two-part epoxy for this repair.
• 10172649Mar 20, 2020Equipment, Engine cooling. Customer Service Announcement saying that Service Pack (SP) 3 for DiagnosticLink® 8.11 Standard and Professional will be available for download from the Detroit Diesel server.
• 10172593Mar 18, 2020Electrical system. Service Solution for M2 ABS Wiring Harness Rubs On Forward Cab Mount. ABS chassis harness is rubbing on the rear of the driver side forward cab mounting bracket on M2 106 trucks with a 160 MM Cab Hgt. This may cause open or shorted circuits in multiple wires in the harness transitioning from the chassis to the cab. Noticeable symptoms include illumination of the ABS and ATC indictor lamps.
• 10172579Mar 17, 2020Equipment. Open recall and Field service Campaigns report send out to Dealers, General Managers, Service managers and warranty managers.
• 10172574Mar 17, 2020Equipment, Suspension. Freightliner Service Bulletin for vibration troubleshooting - finding the cause. This version replaces the version dated 5/1/14 and adds New Cascadia.
• 10172547Mar 17, 2020Body and structure, Equipment. Warranty Policy Letter explaining the Warranty Department is aligning with the frame rail repair policy, published in DTNA Workshop Manuals, which states that there are very few cases in which welding a heat-treated frame rail is allowed. Therefore, before welding anything on a frame rail, contact the applicable regional service representative for approval.
• 10172148Mar 5, 2020Engine cooling. Technical Service Letter for DD Platform Heavy Duty, Metal in the Oil and Oil Filter. Some engine component failures can cause metallic debris to circulate throughout the engine lubrication system. Although the oil filter will capture most of this debris, some debris may enter the clean side of the lubrication system during oil filter bypass. Detroit has created a lubrication system cleaning and flushing procedure…
• 10172136Mar 5, 2020Electrical system. Customer Service Announcement saying that Service Pack (SP) 2 for Diagnostic Link 8.11 Standard and Professional will be available for download from the Detroit Diesel server.
• 10172025Mar 4, 2020Equipment. Open recall and Field service Campaigns report send out to Dealers, General Managers, Service managers and warranty managers
• 10171850Feb 28, 2020Transmission and drivetrain. Service Solution for OBD16 M2, C2, 108SD & 114SD Allison transmission not shifting due to harness chafing.
• 10171360Feb 14, 2020Electrical system. Service Bulletin for Guidelines for Repairing or Replacing an Electrical Harness. Use the guidelines in this bulletin to determine if a damaged electrical harness should be repaired or replaced.
• 10171359Feb 14, 2020Equipment, Lane departure, Transmission and drivetrain, Suspension. Revision to a Warranty Policy Letter announcing the One Stop Supplier Extended Program Launch. The One Stop Supplier Extended Program streamlines the claim filing process because with One Stop Supplier Extended, the service network will file claims for some supplier-supported coverages in OWL. Revisions are in blue.
• 10170856Jan 31, 2020Electrical system, Engine cooling. Customer Service Announcement reminding service locations to update their DiagnosticLink software. To maintain access to the Detroit server, all DiagnosticLink computers must be updated with the current version of DiagnosticLink software. all DiagnosticLink 8.08 installed versions will be disabled as of Tuesday, January 28, 2020.
• 10170855Jan 31, 2020Engine cooling, Equipment. Customer Service Announcement for a policy change regarding Detroit Service Information Bulletins (SIBs) will now have a 60-day expiration, starting on the release day of the bulletin. The intent of a SIB is to notify the service network of a major change to one or more service procedures. Do not save SIBs nor reference them for repairs, as they are uncontrolled and never updated.
• 10170842Jan 31, 2020Equipment, Other or unknown. Revised Customer Advisory Letter for performing a Fifth Wheel Air-Operated Kingpin Release Functionality Inspection on vehicles equipped with a dash controlled fifth wheel air operated king pin release valve. This revision updates the Standard Repair Times (SRTs) in the work instructions section.
• 10170604Jan 21, 2020Other or unknown, Equipment. Customer Advisory Letter for performing a Fifth Wheel Air-Operated Kingpin Release Functionality Inspection on vehicles equipped with a dash controlled fifth wheel air operated king pin release valve.
• 10170299Jan 20, 2020Suspension, Transmission and drivetrain, Other or unknown, Lane departure. Warranty Policy Letter announcing the One Stop Supplier Extended Program Launch. The One Stop Supplier Extended Program streamlines the claim filing process because with One Stop Supplier Extended, the service network will file claims for some supplier-supported extended coverages in OWL.
• 10170265Jan 16, 2020Visibility (wipers, defrost, mirrors). Service Bulletin for A/C system receiver-drier replacement guidelines.
• 10170264Jan 16, 2020Electrical system. Service Bulletin on guidelines for repairing or replacing an electrical harness.
• 10169679Jan 2, 2020Electrical system, Engine cooling, Equipment. Warranty Information Letter announcing Detroit NOx Sensor Circuit Improvements for GHG17 After Treatment Systems
• 10169527Dec 19, 2019Engine cooling. Service Bulletin for M2 Surge Tank Shunt Line Clamp Replacement. On some vehicles, the shunt line coolant hose is disconnecting from the surge tank and replacing the constant tension clamp with a Breeze® brand clamp resolves the issue.
• 10168624Dec 2, 2019Electrical system, Engine cooling, Equipment. Camshaft Position (CMP) sensor terminal fretting due to vibration for DD5 and DD8 engines.
• 10168079Nov 20, 2019Electrical system, Equipment. Service Bulletin for upgrading BHM software for switch expansion module fault SPN 698 FMI 7.
• 10168048Nov 20, 2019Electrical system, Equipment. Service Bulletin for severe duty main PDM installation for vehicles operating in severe moisture and/or corrosive environments.
• 10168038Nov 19, 2019Equipment. Service Bulletin for paint finish standards. Delfleet One has been added for aftermarket use. This version replaces service bulletin dated May 5, 2017.
• 10168036Nov 19, 2019Equipment. Warranty Policy letter announcing service locations have 90 calendar days from delivery to open a repair order which Identifies and addresses discrepancies from the sales order.
• 10166964Nov 1, 2019Transmission and drivetrain, Equipment, Electrical system. Service Bulletin about the powertrain PDM and Main PDM bracket being modified to reduce stress and vibration to the Powertrain Power Distribution Module (PTPDM).
• 10166962Nov 1, 2019Equipment. Service Bulletin revision to an earlier submission of SB54-308 for October 2019 (19MC2968). The prior submission added new screenshots. This revision adds clarification for vehicle programming.

← All problems reported for the 2020 Freightliner Business Class M2