NHTSA ID Number: 10043812
Manufacturer Communication Number: FSB-258-031
TSB/Document Date: 2012-04-27
Summary
MACK
: ON CERTAIN MACK VEHICLES BUILT BEFORE 2/13/2012, THE FRONT CHASSIS TO UREA TANK CONNECTION, LOCATED ON THE SIDE OF THE DEF TANK MAY RUB MOUNTING BRACKET OR NOT STAY SECURED. *JS
Field Service Bulletin
Trucks
Mack Trucks, Inc.
Greensboro, NC USA
SB-10043812-9325
Date
Group
No.
Release
Page
2.2012
258
031
1
1( 5 )
Diesel Exhaust Fluid (DEF) Tank Harness
Bracket and Routing
CHU, CXU, GU, TD
FSB 258-031, DEF Tank Harness Bracket and
Routing
February 2012
W3071686
On certain Mack vehicles built before February 13, 2012, the front chassis to urea tank
connection, located on the side of the def tank, may rub the mounting bracket or not stay
secured to the mounting bracket. This can lead to electrical faults or corrosion of the
connections. Use the following procedure to relocate and to provide a better mounting of the
connector and harness.
Required Parts
Part Description
Quantity
Part Number
Bracket
1
21762055
6
980464
Screw
1
994785
Nut
1
990949
Retainer
1
8153965
Retainer
3
20519287
PV729-FSB258-031_ M
USA52060
Mack Trucks, Inc.
Field Service Bulletin
Date
2.2012
Group
No.
Release
258
031
1
Procedure
You must read and understand the precautions and guidelines in Service Information,
Function Group 2, “Engine Safety Practices” before performing this procedure. If you
are not properly trained and certified in this procedure, ask your supervisor for training
before you perform it.
1 Remove all cables from ground (negative) battery terminals to prevent personal injury
from electrical shock and prevent damage to electrical components
2 Cut cable ties as needed to loosen the DEF harness and connector
3 Remove the two lower fasteners which secure the After Treatment Control Module (ACM)
and the “L” bracket to the DEF tank. Discard the L bracket.
4 Install the new bracket into position on the DEF tank. Secure fasteners and tighten to
24 ± 4 Nm (18 ± 3 ft-lb)
W3071685
Page
2( 5 )
Mack Trucks, Inc.
Field Service Bulletin
Date
2.2012
Group
No.
Release
258
031
1
5 Install the fasteners (3 push-in retainers, 1 saddle retainer) onto the new mounting plate
W3071684
Item Position
Number
Quantity
Part Number
1
1
21762055
on all retainers
6
980464
Screw
4
1
994785
Nut
7
1
990949
Retainer
3
1
8153965
Retainer
2, 5, 6
3
20519287
Part Description
Bracket
Cable Tie
Page
3( 5 )
Mack Trucks, Inc.
Field Service Bulletin
Date
2.2012
Group
No.
Release
258
031
1
6 Route and secure the DEF harness to the bracket with cable ties as shown in illustration.
Route the connector cable tie through existing holes in the bracket.
7 Route and secure the ACM breakout to bracket with cable ties as shown in illustration
W3071686
8 Install all previously removed cables to the ground (negative) battery terminals
Note: Ensure that the harness and connectors are retained and do not make contact with
the bracket causing rubbing.
Page
4( 5 )
Mack Trucks, Inc.
Field Service Bulletin
Date
2.2012
Group
No.
Release
258
031
1
Reimbursement
This repair may be eligible for reimbursement if a product failure was experienced
within time and mileage limits of the applicable Warranty coverage. Reimbursement
is obtained via the normal claim handling process.
Claim Type (used only when uploading from the Dealer Bus.
Sys.)
01
Labor Code
Primary Labor Code
2352F-42-80
0.3 hrs.
Causal Part
21372179
Mack Trucks, Inc engages in a continuous program of testing and evaluating to provide
the best possible product. Mack Trucks, Inc., however, is not committed to, or liable for
updating existing chassis.
Page
5( 5 )
- ALL-IN-ONE HEAVY-DUTY DIAGNOSTIC PLATFORM FOR PROFESSIONAL...
- 42+ SERVICE & RESET FUNCTIONS FOR DAILY MAINTENANCE JOBS...
- ADVANCED BI-DIRECTIONAL CONTROL & ACTIVE TESTING CAPABILITY...
- ECU CODING & MODULE MATCHING FOR POST-REPAIR CALIBRATION...
- FULL-SYSTEM HDOBD/OBD2 DIAGNOSTICS WITH WIDE COVERAGE...
- [Wide Compatibility Heavy Duty Truck Scanner] Compatible...
- [Full-System Diagnostic Truck Scanner] This heavy duty...
- [DTC Library + Live Data] This truck diagnostic scanner's...
- [2-in-1 Heavy Duty & OBDII Diagnostics] This heavy duty...
- [Supports Multiple Vehicle Types] Suitable for various...
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: FSB-258-031
Replacement Service Bulletin Number:
MFR Communication Date: 2012-02-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:MOUNTING
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way. THINKSCAN 689BT Bidirectional Scan Tool Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- Full Bi-Directional Control & 3000+ Active Tests: Take control and test components like actuators, fuel injectors, relays, and cooling fans in real time. You’ll quickly see if the problem is in the part itself or the control module — saving you hours of guesswork and frustrating trial-and-error.
- Advanced ECU Coding Capabilities: Handle module matching and hidden feature activation with confidence. When you replace an ECU or want to customize settings, this obd2 scanner diagnostic bi directional tool gives you the professional-level capabilities you need without the dealership price tag.
- 34+ Useful Reset and Maintenance Functions: Complete everyday service tasks smoothly with a wide range of helpful reset and maintenance functions. Whether you’re keeping up with regular upkeep or tackling a specific job, this scanner makes maintenance simpler and less stressful for both DIYers and pros.
- Comprehensive Full System Diagnostics: Diagnose every major system — Engine, Transmission
, ABS, SRS, TPMS, and more — all in one place. Finally stop wondering if you’re missing something important; get the full picture and clear codes with ease.
- Top Reasons to Choose the D7S OBD2 Scanner: XTOOL D7S car scan tool, an upgrade of XTOOL D7, offers comprehensive features for automotive technicians, workshops, and DIY enthusiasts 1. Upgraded Hardware: 2+64GB memory, rear camera, intuitive interface, foldable bracket 2. Complete Diagnostics: FCA Autoauth, OE-level all system scan, 39+ maintenance services, 4K+ bidirectional, CANFD/DoIP protocol 3. Advanced Capabilities: ECU coding, PMI functions 4. Wide Compatibility: Support 10,000+ models, covering 99% vehicle brands 5. Multi-language: Available in 22+ languages, No IP Restrictions 6. 3-Year Updates: Save 300 bucks on software updates for the latest features and optimizations
- 2026 Upgraded D7S Car Scanner Features: The newly 2026 D7S V2.0 scanner for car brings exciting features for advanced vehicle diagnostics and enhanced user experience 1. FCA AutoAuth: Now supports FCA SGW module for Chrysler, for Jeep, for Dodge (2018+), for Fiat (2017+), enabling faster vehicle communication without gateway restrictions 2. PMI (Offline ECU Programming): Allows for Ford, for Lincoln, and for Mazda ECU programming for new modules 3. Optimized Diagnostic Report 2.0: Personalized reports with logos and customer info for auto shops. Note: Compatibility varies by cars, please check before order
- Cost-effective ECU Coding Scan Tool for Specific Brands: Enhance your vehicle's performance with XTOOL D7S! This obd2 scanner all systems bidirectional offers advanced capabilities at an affordable price, supports online for BMW, for Benz and offline for BENZ, for MIT, along with PMI functions for Ford, for Mazda, and for Lincoln. Ideal for technicians and DIY enthusiasts, this automotive scanner diagnostic tool optimizes vehicle performance and enhances the driving experience. Note: Not for all cars and modules, please send car VIN to check the compatibility before purchase
- OE All System Diagnostic & 8 Pids Graphing: XTOOL D7S is a comprehensive all system bi directional obd2 scanner that delivers dealer-level diagnostics, completely controlling over your vehicle’s performance and health. This automotive scan tool can read and clear DTCs, view live data and ECU information, retrieve freeze frames, and perform active tests and full obd2 functions. This bi-directional scan tool can can identify your vehicle's make, model, and year information with just one click and show up to 8 PIDs live data with options for CSV viewing, playback, and recording for in-depth analysis. It is easy-to-use for both professionals and beginners, helping pinpoint issues efficiently
- 3 Years Software Update, Value for Money: With 3 years of software updates and 22+ languages(no IP restrictions), XTOOL D7S auto scanner code scanner ensures ongoing compatibility for the latest car models and improved diagnostic functions. This all system vehicle diagnostic scanner comes with a 30-day return policy and a 24-month repair for dependable performance. XTOOL are dedicated to your satisfaction, so enjoy seamless support and lifetime expert assistance. Should you encounter any issues or concerns, don’t hesitate to reach out XTOOL. D7S with newest update with 22 languages freely transfer without authorization, check details from setting-language or from XTOOL
- 【✅Compared to BOSSCOMM IF742, IF745 Offers Full-System Diagnostics】The BOSSCOMM IF745 car diagnostic scanner is an upgraded model of IF742. In addition to supporting all OBD2 Code Reader functions and 6 reset options (ABS/EPB/SAS/BMS/Oil/Throttle), it expands diagnostics from 4 systems (Check Engine/ABS/SRS/Transmission) to vehicle All systems, including Steering, Suspension, and Body Electronics. This provides deeper, more comprehensive diagnostic capabilities.
- 【✨6 Essential Resets: ABS Bleeding, Oil, EPB, SAS, Throttle, BMS】The BOSSCOMM IF745 obd2 scanner diagnostic tool swiftly purges air from brake lines to restore braking sensitivity, fine-tunes maintenance cycles to eliminate false alerts, resolves parking brake issues with one-click control, recalibrates steering sensors for stability, optimizes engine idling/acceleration for smoother performance, and deeply resets battery systems to extend lifespan and range via precise parameter adjustments.❗NOTE: Does NOT support bidirectional control, coding, or programming.
- 【✨Deep Diagnostics for All Vehicle System Modules】Beyond code reading/clearing and ECU information retrieval, our all-in-one data stream feature lets you inspect all current fault codes and their locations across the vehicle’s systems. This vehicle code reader helps you turn off dashboard warning lights and perform a comprehensive self-check of your car at home—no more back-and-forth trips to the repair shop or hefty inspection fees.
- 【✨10 OBD2 Functions】The BOSSCOMM IF745 scan tool’s DTC Lookup instantly translates fault codes into user-friendly explanations, its I/M Readiness feature streamlines emissions testing with a single tap, and Freeze Frame lets you pinpoint the exact moment of a fault for in-depth root-cause diagnosis. Combined with a live data dashboard and advanced diagnostics (O2S, OBMon, EVAP), it delivers comprehensive insights for confident troubleshooting.
- 【✨10,000+ Car Models, AutoVIN, 13 Languages】The BOSSCOMM IF745 vehicle scanner diagnostic tool covers 73+ global car brands and offers support in 13 languages, making it perfect for DIYers, auto mechanics, or as a thoughtful gift. With a single-click AutoVIN feature, it instantly retrieves vehicle serial numbers, streamlining diagnostics for users globally. This adaptable tool balances user-friendliness with precision, catering to both personal and professional requirements.✅Unsure about compatibility? Compatibility will vary on vehicles' model and year, pls reach us via 📧 [email protected] 📧 before purchase.
This product presentation was made with AAWP plugin.