# Service bulletin TechTalk7394

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10186596
- Published by NHTSA: 2021\-02\-02
- Manufacturer's number: TechTalk7394
- Manufacturer's date: 2021\-01\-07
- NHTSA component: ELECTRICAL SYSTEM; EQUIPMENT; LANE DEPARTURE

## NHTSA's summary

Tech Talk discussion on 2019 Western Start Door Speakers INOP. Also discusses Speaker interrupts for 2018 M2.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10186596-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10186596-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Driver assistance, Electrical system, Equipment and accessories

## Vehicles listed

- 2018 FREIGHTLINER BUSINESS CLASS M2
- 2019 WESTERN STAR 5700

## Recalls for the same vehicles and component

- [2021697](/recalls/tc/2021697.md), 2021-11-12: Electrical
- [21V882000](/recalls/nhtsa/21V882000.md), 2021-11-12: ELECTRICAL SYSTEM:WIRING
- [2021172](/recalls/tc/2021172.md), 2021-03-24: Electrical
- [21V206000](/recalls/nhtsa/21V206000.md), 2021-03-24: ELECTRICAL SYSTEM:WIRING
- [2020217](/recalls/tc/2020217.md), 2020-05-18: Electrical
- [20V281000](/recalls/nhtsa/20V281000.md), 2020-05-18: ELECTRICAL SYSTEM:WIRING
- [18V191000](/recalls/nhtsa/18V191000.md), 2018-03-26: ELECTRICAL SYSTEM:WIRING

## Other bulletins for the same vehicles and component

- [SBW54\-080](/bulletins/10198595.md), 2021-06-29, Service bulletin: ELECTRICAL SYSTEM. Western Star Service Bulletin for Key Fob ID Retention. 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.
- [SS708\-WST2021](/bulletins/10198288.md), 2021-06-26, Service bulletin: ELECTRICAL SYSTEM. Western Star Service Solution for Low Voltage Disconnect \(LVD\) Troubleshooting: Western Star 5700 and New 4700.
- [WSTCAE176\-2020](/bulletins/10193767.md), 2021-05-18, Service bulletin: TRAILER HITCHES; EQUIPMENT; STRUCTURE:FRAME AND MEMBERS. Removable Front Tow Hook Changes
- [WSTCAE170\-2019](/bulletins/10193761.md), 2021-05-18, Service bulletin: EQUIPMENT; EQUIPMENT:APPLIANCE:AIR CONDITIONER; VISIBILITY. New Valeo A/C Compressor
- [WI21\-008](/bulletins/10190549.md), 2021-04-23, Service bulletin: EQUIPMENT. 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.
- [DT12 Trans Chafe](/bulletins/10190020.md), 2021-04-08, Service bulletin: EQUIPMENT; EQUIPMENT ADAPTIVE/MOBILITY; POWER TRAIN. 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 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.
- [WP60\-100](/bulletins/10189335.md), 2021-03-25, Service bulletin: EQUIPMENT. Updated Western Star Parts Technical Bulletin for Universal Design Floor Mats. 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.
- [SBW54\-057](/bulletins/10189332.md), 2021-03-25, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM. Western Star Service Bulletin for Powernet Troubleshooting Guide \- Batteries, Path, Alternator, and Starter. 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.
- [WP21\-007](/bulletins/10189319.md), 2021-03-24, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM. 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.
- [ICI21\-003](/bulletins/10187524.md), 2021-02-26, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. 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.

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