2022 Western Star 5700 TSBs

Guard Assist (SGA).

On certain Freightliner and Western Star vehicles with Detroit Diesel engines, the engine fan fails to activate when the A/C pressure switch circuit is opened, resulting in poor A/C cooling performance at idle.

Model Year 2022 Freightliner, Western Star, Freightliner Custom Chassis, and Thomas Built Bus vehicles manufactured with the following engines have been built without a Particulate Matter (PM)/Soot sensor: DD15 Gen 5 (Gats 2.0) (with a June 2021 or later GHG build date) DD13 Gen4 (1-box) (with a June 2021 or later GHG build date) Cummins B6.7 (with a June 2021 or later GHG build date) Cummins X15 with ratings of 400-500HP (with a June 2021 or later GHG build date) As a result, the vehicle has a non-conforming On-Board Diagnostic (OBD) system. The engine manufacturers will pay to install the OBD PM sensor and corresponding software through a recall once sensors become available.

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 contacting the transmission TCU case. To reduce potential chafing areas, the proposed short-term containment was to route the wiring harness using additional tie straps. This communication applies to Freightliner and Western Star vehicles built with DT12 transmissions.

Resubmitting to fix a table formatting issue.

REVISION: The bulletin has been revised to add additional work instruction steps to remedy errors encountered during the flashing process.

Certain vehicles requesting Intelligent Powertrain Management, were shipped without the Integrated Predictive Powertrain Control (IPPC) module required to enable the feature. The IPPC module will be installed and software updated.

Due to electronic control supply shortages, vehicles shipped without the Intelligent Powertrain Predictive Cruise (IPPC) module. The purpose of the IPPC module is to improve fuel efficiency when the Predictive Cruise Control feature is enabled. Not having the IPM does not affect othercruise control functions, such as Adaptive Cruise Control or standard cruise control.

When troubleshooting powernet issues, use the BCT-460DTNA PowerNet Assessment Tool. As of May 29, 2018, the AutoMeter is the only Daimler-approved tool for troubleshooting vehicle Powernet issues.

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.

Key fobs for remote keyless entry on Western Star vehicles are delivered in packages that include a unique ID for the fob. The ID is required when pairing the key fob with a vehicle.

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.

some GHG17 DD16 powered vehicles will be equipped with the Global Aftertreatment System (GATS), instead of a 1-Box aftertreatment.

Update to CXA 6_24_NOx submission.

Production Schedule Update We recently communicated to our Freightliner Trucks dealer distribution network the rolling production delays for medium-duty truck models built at our Mount Holly and Santiago Truck Manufacturing Plants(TMP). The effects of the COVID-19 pandemic continue to impact global semiconductor supply chains and the prolonged duration of these shortages have reached our heavy-duty truck supply chain as well.

The updated times will be applied to repair orders opened on or after April 5, 2021.

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.

This letter is to inform you that a revised bulletin for Detroit Diesel Field Service Campaign D21M1, DT12 Transmission Drive Shaft Cover Plug Reseal has been EXTENDED for an additional three months. Please use the extended termination date for all work under D21M1 from this point forward. REVISION: D21M1 termination date extended to July 1, 2022.

Transmission will not shift into Gear while driving or will not start and trigger multiple PT CAN Fault Codes.

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.

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.

Western Star 4700, 4800, 4900, and 6900 models; the plant has also reached the maximum paint process capacity for multi-color and custom paint designs. Due to the capacity constraint, the Western Star CAE team will no longer accept Truck Change Orders requesting changes from a single color paint to a multi-color paint or custom paint design for vehicles building at the Portland Truck Plant through the end of 2021.

This bulletin replaces the version dated February 12, 2021. Information about parts notes in the Paragon system have been added and the trimming instructions are revised. Universal floor mat designs fit multiple cab configurations and may require trimming. Trim lines displaying size options are scored into the pad side of the mat; use an existing floor mat as a guide for optimal results. The new mat should not interfere with safety-critical equipment, such as foot pedals.

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 these faults.