iCarsoft HD V4.0 Heavy Duty OBD2 Truck Diagnostic Tool Full System Scanner DPF

iCarsoft HD V4.0 Heavy Duty Truck Diagnostic Scanner OBD2 Code Reader

The iCarsoft HD V4.0 is a professional heavy-duty truck diagnostic scanner designed for truck mechanics, repair workshops and fleet operators. Featuring a 5-inch HD touchscreen, it supports diagnostics across available electronic control modules and includes eight service reset functions. With 37 pre-installed vehicle brands, support for heavy-duty and 12V vehicle diagnostics, and included OBD-6, OBD-9 and CAT-9 adapters, this scanner offers versatile diagnostic coverage. It also supports major protocols, including J1939, J1708 and CAN FD, with lifetime free software updates delivered via Wi-Fi.

Professional. Comprehensive. Powerful. A Complete Diagnostic Solution for Commercial Fleets.

The iCarsoft HD V4.0 is a premium 5-inch touchscreen heavy-duty diagnostic scanner built for truck mechanics, repair shops, and owner-operators. It delivers dealership-level diagnostics across all available electronic control modules, plus essential everyday maintenance functions. Equipped with lifetime free software updates, the HD V4.0 keeps your fleet running efficiently while avoiding costly breakdowns and emergency repairs.

• 8 Service Reset Functions
• Wide Vehicle Coverage
• 5-inch Touchscreen
• Lifetime Free Software Updates

01 Pre-installed 37 vehicle brands:

Thirty-seven badges on board — before the first job ticket.

From American long-haul to European cab-overs and industrial iron, the coverage is already on the device the day it arrives:

• for Cummins
• for DAF
• for Mitsubishi (Diesel)
• for Sprinter (Diesel)
• for Toyota (Diesel)
• for Ford USA (Diesel)
• for Allison
• for Ashok Leyland
• for Bendix
• for Mercedes-Benz (HD)
• for Bosch
• for Caterpillar
• for Detroit
• for Doosan
• for Eaton
• for Eicher
• for Freightliner
• for Fuso
• for HALDEX
• for Hino
• for Hyundai
• for International
• for Isuzu
• for IVECO (Diesel)
• for Kenworth
• for Mahindra
• for MAN
• for Paccar
• for Peterbilt
• for Renault
• for Tata
• for Volvo (HD)
• for WABCO ABS (HD)
• for Western Star
• for Mack
• for Scania
• for UD

02 Extension Software Package Available (Sold Separately)

When the fleet grows, the coverage grows with it.

If the pre-installed vehicle brands cannot meet the needs, the user can purchase the extension software package to get more vehicle software. Please contact us or your local agent to purchase extended software packages for the following vehicles:

• for Bobcat
• for Force Motors
• for Volkswagen (HD)
• for Komatsu
• for Hitachi
• for Volvo Penta
• for Volvo CE
• for Sunwin
• for Sunlong
• for Sterling
• for Sitcar
• for Setra
• for SCR
• for New Holland
• for John Deere
• for JCB
• for Irisbus
• for ERF
• for Credo
• for Case
• for Bremach
• for BharatBenz
• for ABS
• for VW
• for Peugeot
• for Nissan
• for G.M
• for Fiat
• for Citroën
• for Chrysler
• for Denso Diesel
• for Delphi
• for MaxxForce
• for Kubota

03 Flagship Hardware Built for Professionals

Big-screen muscle for greasy-glove work.

iCarsoft HD V4.0 truck diagnostic tool features a 5-inch HD touchscreen. Powered by a 1.3 GHz MediaTek MT6580 (ARM Cortex-A7) processor running Android, it comes with 2GB memory, 64GB storage, and a 3150mAh battery, supporting up to 3 hours of continuous operation. Boasting an intuitive interface, it delivers seamless vehicle diagnosis performance.

04 Lifetime Free Software Upgrades

Pay once. Upgrade forever.

Unlike other truck scan tools on the market that require annual subscription fees, the HD V4.0 offers lifetime free software upgrades. Updates are delivered wirelessly via Wi-Fi, with new diagnostic protocols and vehicle model coverage continuously released.

• No subscription fees, ever
• No renewals, no unlocks, no paywalls
• Wireless Wi-Fi delivery: Updates arrive over the air, no cables
• New protocols & model coverage: Continuously released as fleets evolve

05 8 Common Service Reset Functions:

The eight jobs that keep trucks earning.

Pick a function below to see it on the big screen — each one is a routine job the HD V4.0 turns into a two-minute task in the bay.

28 Languages Supported

Speaks your crew’s language — all of them.

Easily switch between 28 built-in languages for global operations:

• English
• Deutsch
• Español
• Français
• Italiano
• 日本語
• Português
• Русский
• Polski
• Türkçe
• Nederlands
• Magyar
• 繁體中文
• 한국어
• Ελληνικά
• Slovenčina
• Română
• العربية
• Hrvatski
• Slovenščina
• Suomi
• Čeština
• Tiếng Việt
• Svenska
• Српски
• فارسی
• Български
• Dansk

07 Supplied with 3 Essential Heavy-Duty Adapters

Three connectors in the case, zero adapters to hunt.

The HD V4.0 comes standard with 3 specialized heavy-duty diagnostic connectors (OBD-6, OBD-9, and CAT-9). This eliminates the need to purchase separate diagnostic cables, ensuring seamless plug-and-play compatibility with non-standard OBD interfaces across major commercial trucks, buses, and Caterpillar industrial equipment right out of the box.

• OBD-6
• OBD-9
• CAT-9

08 HD V4.0 is a 2 in 1 OBD scanner:

One port for the semi and the pickup.

The HD V4.0 truck code reader can scan the engine module through the OBD interface on both heavy-duty and 12V vehicles.

• a: Read and clear fault codes, and turn off the malfunction indicator light (MIL).
• b: O2 sensor test to check fuel efficiency and vehicle emission.
• c: Display freeze frame data and retrieve vehicle information.
• d: EVAP test for fuel tank system (Carbon canister test).
• e: Display I/M readiness status (non-continuously monitored system test).
• f: Request On-Board Monitoring test results for specific monitored systems.

09 HD V3.0 VS HD V4.0

Old guard vs. new flagship, line by line.

Upgrading from the button-operated classic? Here is the full feature-by-feature comparison.

Quick take: the V4.0 keeps everything the V3.0 does well, then adds the touchscreen, Wi-Fi one-click upgrades, the CAT-9 connector and all eight service resets — the pick for shops that live in the service bay.

10 Product Specifications:

The numbers under the hood.

• Operating System: Android 8.1
• CPU: MediaTek MT6580, ARM Cortex-A7, 1.3 GHz
• Memory: 2GB
• Storage: 64GB
• Display: 5-inch HD touchscreen with 854 x 480 resolution
• Connectivity: USB Host / USB Type C / Wi-Fi (2.4GHz) / Bluetooth
• Battery Capacity: 3.8V 3150mAh
• Tested Battery Life: Up to 3 hours of continuous use
• Type C Input: 5V / 2A
• Operating Temp.: -10 to 50°C (14 to 122°F)
• Storage Temp.: -20 to 60°C (-4 to 140°F)
• Supported Automotive Protocols: SAE J1850 PWM, SAE J1850 VPW, ISO 9141, ISO 14230-2, ISO 14230-4 KWP, ISO 15765-4 CAN, J1708, J1939, CAN FD

Eight Resets

Clutch Matching

 Brake-Pad Reset

Cluth Matching

Brake-Pad Reset

Injector Coding 

Oil Reset

Cylinder Cut Out 

Sp-eedLi.mit Service 

C. -R Service

Conquer the Road with Confidence: iCarsoft HD V4.0

Keep your fleet moving and your business profitable. The iCarsoft HD V4.0 is your all-in-one professional diagnostic companion, engineered to tackle the toughest truck maintenance challenges directly on the roadside or in the shop. Move beyond guesswork and gain complete control over your truck’s health.

1. Comprehensive Full-Systems Diagnostics

Gain deep insights into every critical system. Access all available ECU modules for a complete picture of your truck’s status.

• Modules Covered: Engine, Transmission, ABS, SCR/DEF, Brake, Battery, and more.

• Key Actions: Read and clear trouble codes, view live data streams, and retrieve module information for thorough status checks.

2. Vital Reset & Service Functions

Perform essential maintenance resets and adaptations without a shop visit. Our eight core functions restore performance and clear warning lights after service.

• D.P.F. Regeneration: Clear soot blockages to restore engine power and efficiency.

• Oil Service Reset: Reset maintenance intervals accurately after an oil change.

• Injector Coding: Recalibrate or code new fuel injectors for optimal combustion.

• Clutch Matching: Adapt new clutches post-replacement for seamless drivability.

• Brake Pad Reset: Reset wear indicators and clear warnings after pad replacement.

• SCR System Reset: Reset the Selective Catalytic Reduction system post-repair to eliminate malfunction lights.

• Speed Limitier Adjustment: Adjust or restore factory velocity settings to suit different transport tasks.

• Cylinder Cut-Out Test: Quickly identify misfiring or weak cylinders to diagnose power loss and fuel efficiency drops.

3. Smart Pin Detection: Diagnose the Diagnoser First

Avoid frustrating "no communication" errors before you even start. This unique feature ensures your diagnostic session begins smoothly.

• Port Health Check: Verifies the condition and voltage of the vehicle’s OBD port.

• Protocol Detection: Automatically identifies the communication protocol (J1939, J1708, ISO, etc.) used by the truck.

• Time Saver: Confirms a healthy connection instantly, perfect for roadside repairs or unfamiliar vehicles.

4. Real-Time Live Data Monitoring

When problems strike on the highway, real-time data is your key to a quick diagnosis. Monitor critical parameters directly from the ECU to identify the root cause.

• Solve Limp Mode: If your truck suddenly loses power, use live data to determine if the issue is a clogged DPF, a faulty injector, or another sensor failure.

5. Built for the Real World of Trucking

Designed to thrive in the harsh environments where trucks work and break down.

• Rugged & Reliable: Features an impact-resistant housing that stands up to dirt, vibration, rain, and extreme temperatures.

• Glove-Friendly Operation: Use the responsive touchscreen or durable rubber-key buttons even while wearing work gloves.

• Fully Portable: A standalone tool requiring no laptop, giving you full-system access anywhere—at the shop or on the shoulder of the highway.

Turn Breakdowns into Quick Fixes

Long-haul transport is riddled with unpredictable issues: warning lights, clogged filters, injector faults, and clutch failures. The iCarsoft HD V4.0 empowers you to perform on-the-spot diagnostics and critical resets, dramatically reducing costly towing and downtime. Get back on the road faster, with confidence.

Packing Box

• HD V4.0
• PC Connecting Cable
• CAT 9
• OBD 6
• OBD 9
• OBD Diagnostic Cable
• OBD I Adapter
• Packing List
• User Manual

12 FAQ

Real questions from real fleets.

• Q1: Does the iCarsoft HD V4.0 require any annual subscription or update fees?
  A: No, absolutely not. Unlike many other commercial truck scanners on the market that charge hundreds of dollars annually, the HD V4.0 comes with Lifetime Free Software Updates. You can update the software wirelessly with a single click over Wi-Fi without any hidden costs or ongoing subscription fees.
• Q2: Can I expand the vehicle coverage if a specific truck brand isn't pre-installed?
  A: Yes. The HD V4.0 comes pre-installed with 37 major global truck and engine brands. If your fleet requires additional coverage, we offer 34 optional extension software packages (including brands like Bobcat, John Deere, JCB, Volvo CE, etc.). These packages can be purchased separately and activated directly on your device via Wi-Fi.
• Q3: What heavy-duty diagnostic protocols does the HD V4.0 support?
  A: The HD V4.0 supports the major heavy-duty protocols, including SAE J1939, J1708, and J1850 (PWM/VPW). It also supports ISO 9141, ISO 14230-2, ISO 14230-4 KWP, ISO 15765-4 CAN, and the latest CAN-FD high-speed communication protocol.
• Q4: Are the 3 specialized heavy-duty adapters included in the box, or do I need to buy them separately?
  A: They are completely included. The HD V4.0 comes standard with three essential OEM-grade non-standard diagnostic connectors: OBD-6, OBD-9, and CAT-9. This ensures immediate, out-of-the-box compatibility with older commercial fleets and specialized Caterpillar industrial machinery without requiring extra accessory purchases.
• Q5: What's the difference between HD V4.0 and the older HD V3.0?
  A: The HD V4.0 is the upgraded successor to the HD V3.0. It transforms the traditional button-operated scanner into a smart 5" Android touchscreen device, adding convenient one-click Wi-Fi updates and with 8 service reset functions.

The iCarsoft HD V4.0 combines heavy-duty vehicle diagnostics, maintenance functions and wireless software updates in one portable tool. Its 64GB storage, 2GB memory and support for 28 languages make it suitable for a range of professional diagnostic environments. Additional vehicle coverage is available through separately purchased extension software packages. Vehicle compatibility and supported functions vary by make, model, year and system, so please confirm compatibility with your vehicle before purchasing.