2027 Volvo VNR (4) TSBs
44 Technical Service Bulletins across 13 categories
Categories
Electrical
13 bulletinsOverheating has been observed at the alternator power cable and ground cable connection, resulting in melted insulation around the terminal area.
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The alternator power cable connection should maintain a stable electrical contact without overheating or insulation damage during normal vehicle operation. The alternator power cable shows signs of overheating and melted insulation at the connection point, which may affect electrical conductivity and charging system performance.
The purpose of this CBR is to provide aid in VMCU fault B1524-49 along with a Rain sensor which will not calibrate.
The purpose of this cbr is to provide steps on how to protect the alternator power cable connection from corrosion.
The VN(4)'s electrical architecture relies on multiple ECUs, each handling specific functions.
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To ensure seamless operation and peak system performance, it is essential that all ECUs run the same software version (Software Baseline). This is accomplished by installing a complete software baseline, which is delivered via service pack.
The purpose of this cbr is to provide steps on how to protect the alternator power cable connection from corrosion.
The purpose of this CBR is to assist in diagnosing Tire Pressure Monitoring System (TPMS) DTCs U101A /U101B as well as...
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instructions to replace the TPMS Range Extends and Wireless Sensor Gateway if it is determined it is required.
This CBR solution provides guidelines for ensuring the correct position of battery sensor modules and battery sensor...
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harnesses on the Volvo VN(4) chassis, as well as the Battery Sensor Diagnostic, Calibration, and Configuration Procedure.
CBR - Manual TPMS wheel sensor calibration.
CBR - Electric Pneumatic Module (EPM) Fault Code C10C256
TSB - Reversing Camera Harness, Repair.
CBR - EBS - Electro-Pneumatic Module - Signal Compare Failure DTC C109562 - VN (4).
CBR - Trailer, 12Volt Right/Left Direction Indicator Circuit Warning VN (4).
CBR - No Start Condition After Over the Air Programing - VECU5 No Start "Safe State"
Other
11 bulletinsThe ELD connected to the RP1226 connector in the truck remains powered on always.
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As a result in the batteries being depleted within a very short amount of time (a few hours after the truck is shut down).
The purpose of this CBR is to provide steps on how to correct a customer complaint of instrument cluster going dark...
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(blackout) situation.
This bulletin addresses an issue found in the DL6 (FMS) CAN network where the measuredresistance is 40 ohms deviating from the expected 60 ohms.
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This mismatch can result in the Electronic Logging Device (ELD) either receiving incomplete CAN messages or none at all, leading to functional communication issues.
CBR - The purpose of this CBR is to provide support for fault codes C106718 and/or C106818.
CBR - The purpose of this CBR is to provide guidance on fault code U114688.
The purpose of this CBR is to provide steps on how to correct a customer complaint of DTC P107B86 accompanied With...
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intermittent loss of throttle.
The purpose of this CBR is to provide steps on how to correct a customer complaint of instrument cluster going dark...
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(blackout) situation.
Contact Workshop; Communication Lost With Ultracapacitor Message With Associated CCIOM DTC U100687 And A Startability...
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Issue.
The purpose of this CBR is to provide support for fault codes C106718 and/or C106818.
CBR - Communication Lost With Ultracapacitor Message With Associated CCIOM DTC U100687 and a Startability Issue.
CBR - Check Radar Pop-up Message - VN (4).
Engine
5 bulletinsCBR - Injector Widget to Assist in Proper Diagnostic / Injector Repair caused by offset learning max and misfire.
CBR - ECM Failure - No Crank/Engine Start Condition.
The purpose of this CBR it to provide release notes for the recent Engine ECU software.
The purpose of this CBR is to help diagnosis issues with the Proactive Engine Restart system and Hood Open popup...
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message.
The purpose of this CBR is to help diagnosis issues with the Proactive Engine Restart system and Hood Open popup...
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message.
Software & Calibration
3 bulletinsWhen calibrating ECS, the PTT instructions may be lacking needed information.
The purpose of this CBR is address when you should update to 6.0 service pack.
CBR - Key Fob Calibration and/or Replacement.
Body & Paint
2 bulletinsTSB - Under Hood Contamination Prevention.
CBR - Flexible Switch Panel Replacement and Calibration Procedures.
Brakes
2 bulletinsCBR - Aggressive Trailer Braking Troubleshooting Guide.
CBR - Brake Pad Wear Indicator DTC C107E68.
Air Bags & Safety
2 bulletinsIf you have received this document, it is because one or more of the following Faults has been active for at least 5...
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minutes and can potentially prevent the Supplemental Restraint System/Airbag Inflation System (SRS) from functioning properly in the event of a collision. Tech Tool will need to be used for more detailed diagnostics.
CBR - Upper Bunk Restraint System Plastic Gable Retention Field Fix
Tires & Wheels
1 bulletinThe purpose of this CBR is outline the interim software solution for VN4.
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Note that this document is subject to updates and currently covers Service Pack updates to B1_T2_7.0.
Fuel System
1 bulletinThe purpose of this CBR is to address issues of exhaust stack rotation on version 4 products.
Infotainment
1 bulletinThis CBR solution provides guidance on updating the infotainment system when customer is missing applications and/or...
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having issues with navigation or Apple/Android CarPlay.
HVAC & Climate
1 bulletinTSB - Compressor Discharge Line Routing.
Transmission
1 bulletinRD - Over the Air Transmission Oil Level Sensor.
Suspension
1 bulletinCBR - Z Spring Bracket Wear.
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Volvo Chassis