iCarsoft JP V4.0 Professional OBD2 Diagnostic Scanner ECU Coding Bi-Directional Control

iCarsoft JP V4.0 Professional OBD2 Diagnostic Scanner ECU Coding Bi-Directional Control

The iCarsoft JP V4.0 is a professional automotive diagnostic scanner designed for Japanese and Korean vehicles, including Toyota, Lexus, Honda, Hyundai, KIA, Mazda, Nissan and Subaru. It provides full-system diagnostics, bidirectional control, ECU coding for supported Hyundai, KIA, Mazda and Subaru models, and 49 service functions. Featuring a 5-inch Android touchscreen, CAN-FD support, AutoVIN identification and 64GB storage, this diagnostic tablet helps users read fault codes, monitor live data and perform supported maintenance and advanced diagnostic procedures.

DEALER-LEVEL ASIAN CAR DIAGNOSTICS. TRUSTED WORLDWIDE.

The iCarsoft JP V4.0 delivers comprehensive diagnostics across every onboard ECU—including the engine, transmission, ABS, and SRS/Airbag. Designed for serious DIYers and independent repair shops, the JP V4.0 goes far beyond basic code reading — delivering OE-level ECU coding, advanced adaptations, and full bidirectional control.

• Advanced Bi-Directional Control
• 49 Service Functions
• CAN-FD Supported
• Lifetime Free Updates
• 5″ Android Touchscreen
• Hyundai / KIA / Mazda / Subaru ECU Coding

Dealer-Level Diagnostics

One specialist tablet for the cars of the East — read, code, and command, all without a PC.

The JP V4.0 is the touchscreen evolution of iCarsoft’s Asian-vehicle specialist line. Where the older JP V3.0 needed buttons and a USB cable, this generation puts a 5-inch Android workstation in your hand — pairing full-system coverage with bidirectional control, dealer-level coding and over-the-air updates. Sixteen Asian makes, one purpose-built tool for the bench or the driveway.

01 Exclusively for Asian Vehicles

Tuned for Japanese & Korean iron — sixteen makes, zero compromise.

Purpose-built coverage for the Asian brands you actually work on — for Daewoo, for Acura, for Honda, for Hyundai, for KIA, for Isuzu, for Mazda, for Mitsubishi, for Infiniti, for Nissan, for Nissan GTR, for Subaru, for Suzuki, for Lexus, for Scion, for Toyota. Pick a group below, or scan the full make list out of the box.

• 3: Toyota · Lexus · Scion
• 3: Nissan · GTR · Infiniti
• 2: Honda · Acura
• 3 Korean: Hyundai · KIA · Daewoo
• 5 Others: for Mazda, for Mitsubishi, for Subaru, for Suzuki, for Isuzu

Don’t see your car? Send us your VIN and our team will review compatibility against the current coverage information.

02 Powerful Hardware

A 5-inch Android cockpit that keeps pace with your busiest day.

• 5″: HD touchscreen
• Quad: 1.3GHz quad-core
• 64GB: On-board storage
• 5000 mAh: battery
• 6 hrs: Continuous use
• Android: Operating system

iCarsoft JP V4.0 car diagnostic tool is equipped with a 5-inch HD Touch Screen, Android operating system, Quad Core 1.3 GHz processor, 64GB storage and a 5000mAh battery for around 6 hours of continuous use. It offers a user-friendly interface and an ultra-smooth diagnostic experience.

03 Lifetime Free Software Upgrades

Pay once. Upgrade forever.

Unlike other OBD scan tools on the market that require annual subscription fees, the JP 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 PC, no cables
• New protocols & model coverage: Continuously released as cars evolve

04 Supports the Latest CAN-FD Protocol

Fluent in the high-speed bus of the newest Asian models.

CAN-FD (Controller Area Network – Flexible Data-rate) is a next-generation automotive communication protocol adopted by Asian vehicles.

• CAN-FD: Controller Area Network – Flexible Data-rate. A faster, higher-bandwidth successor to classic CAN.
• Adopted by Asian Vehicles: A next-generation protocol now appearing across newer Asian models. Keeps the JP V4.0 talking to your latest cars.
• Future-Proof: Lifetime updates keep adding new protocols and models. Ready for your current car and your next one.

05 Advanced Bi-Directional Control

Stop guessing — command the part and watch it answer.

The JP V4.0 goes beyond reading codes. With full bidirectional control, you can command individual components and watch them respond in real time — cycle the ABS pump motor, run window regulators, activate the fuel pump, open the throttle, and run output tests on almost every onboard module. Pinpoint the faulty part in minutes, without trial-and-error.

• Cycle the ABS Pump Motor: Command the ABS pump and watch it respond in real time.
• Run Window Regulators: Activate window regulators and output tests on almost every module.
• Activate the Fuel Pump: Trigger the fuel pump on demand to confirm a fault in minutes.
• Control the Throttle: Open the throttle and run output tests — no trial-and-error.
• Cycle the EGR Valve: Drive the valve open and closed to clear carbon causing a rough idle.
• Command the Fuel Injectors: Cut or drive individual injectors in real time to isolate misfires.
• Trigger the Cooling Fans: Switch high and low fan speeds on demand to verify relays and motors.
• Sequence Transmission Solenoids: Cycle shift solenoids one by one to pinpoint slippage and harsh shifts.

⚠ Compatibility Notice: And More · 22+ active tests across every onboard system — and growing with each update.

• Cycle the ABS Pump Motor
• Run Window Regulators
• Activate the Fuel Pump
• Control the Throttle

06 Advanced ECU Coding: Unlock Your Vehicle's Full Potential

Code it like the dealer — Hyundai, KIA, Mazda & Subaru.

Maximize your workshop’s capabilities with our professional-grade ECU Coding feature. Seamlessly bridge the gap between component replacement, software troubleshooting, and personalized driving experiences across Hyundai, KIA, Mazda, and Subaru car groups.

• For Hyundai / KIA (2010 – Present): Module Matching & Data Migration (Backup/Clone) — Service ➚ Variant Coding
• For Mazda (2003 – 2020): Hidden Function Activation & Personalization — Programming ➚ Programmable Parameters
• For Subaru (2014 – Present): Warning Systems & Functional Toggles — Service ➚ VSP Category

ECU Coding for Hyundai / KIA (2010+)

Match, rewrite and migrate control-module data after component replacement — so a new ECU behaves exactly like the one it replaced.

• AEB (Autonomous Emergency Braking): Re-write configurations after transmission/drivetrain replacement, including Drive Type (2WD/4WD) and Transmission Type (AT/MT).
• BCW / BSD (Blind-Spot Warning): Program blind-spot radar profiles based on body style (Sedan/Limousine) and detection type (Active ABSD/Warning-Only Non-ABSD).
• ECS (Electronic Suspension): Map suspension dampening based on Engine Type (Lambda/Tau), Drive Type (2WD/4WD), and regional destination codes.
• EPB (Electronic Parking Brake): Match and rewrite variables for new EPB ECUs, including Cluster Type (CAN/None), ABS Type (CBS/ABS/ESC), and Gearbox Type (AT/MT).
• HCU (Hybrid Control Unit): Synchronize the hybrid management module with vehicle specs, audio types, and immobilizer settings during replacement.
• Backup & Input: Clone and transfer data directly from the old ECU into the new replacement module to instantly eliminate coding mismatch faults.

ECU Coding for Mazda (2003 - 2020)

Activate hidden functions and personalize body, cluster and security settings the factory keeps locked.

• Available Models: Available for Axela (Hybrid), CX-Series (3/4/5/7/8/9), Mazda 2/3/5/6/8, MX-5, B-Series, RX-8, and Tribute.
• Body Control (BCM #1 & GEM): Toggle anti-theft alarms, auto-headlights, and rain-sensing wipers ON/OFF. Adjust cabin light timeout and rain-light sensor sensitivity.
• Instrument Cluster (IC): Adjust key reminder buzzer volume, toggle driver/passenger seatbelt warning chimes, and switch odometer units.
• Hardware & Security Calibrations: Manage Remote Keyless Entry (RKE) and auto-unlocking. Rewrite tire size/circumference and TPMS placard pressures to fix speedometer and tire alert errors.

ECU Coding for Subaru (2014+)

Fine-tune warning systems, automation timers and driver-display behavior to match how the car is actually used.

• Acoustic & Lighting: Customize lock/unlock answer-back chimes, auto-headlight sensitivity, adaptive steering-assisted lighting, and daytime running lights (DRL).
• Automation & Security: Adjust auto-lock timers, door-ajar alerts, hazard flasher synchronization, factory alarm triggers, and accidental lock-out prevention.
• Ergonomics & Display: Configure automatic side mirror tilt-down in reverse, fine-tune multi-information display contrast, and update regional localization settings.

⚠ ECU Coding is currently available for part of Hyundai, KIA, Mazda, and Subaru. Coding support for additional brands is being rolled out through ongoing software updates.

07 Fast AutoVIN Identification

Plug in — your car names itself in seconds.

Skip the manual VIN typing — simply plug in, and the tool identifies your vehicle in seconds. No typos, no extra lookup time. This boosts accuracy, eliminates input errors, and makes every scan faster and more reliable.

• AutoVIN
• Vehicle Identified
• Manual select

08 Supports 15 Global Languages

Diagnose in the language you think in.

The universal OBD scanner JP V4.0 supports English, German, French, Dutch, Spanish, Czech, Swedish, Russian, Hungarian, Norwegian, Portuguese, Italian, Polish, Danish, and Finnish.

• EN: English
• DE: Deutsch
• FR: Français
• NL: Nederlands
• ES: Español
• CS: Čeština
• SV: Svenska
• RU: Русский
• HU: Magyar
• NO: Norsk
• PT: Português
• IT: Italiano
• PL: Polski
• DA: Dansk
• FI: Suomi

09 49 Comprehensive Service Functions

Nine everyday resets and forty pro routines — ready the moment a job hits the bench.

The JP V4.0 is far more than a basic code reader. It integrates 9 commonly-used service functions for daily maintenance and 40 advanced professional functions for complex repair tasks.

9 Hot Service Functions — Everyday maintenance

▸ 9 Hot Service Functions covering your daily maintenance needs.

• Oil Reset: Allows you to reset the engine oil life system, service lamp, service mileage, and service intervals after an oil change.
• Electronic Throttle Control: Relearns throttle valve control parameters after resetting or replacing the throttle body.
• EPB-Brake-Pad Reset (EPB): Retracts the electric parking brake calipers and resets the brake pads after replacement.
• Steering Angle Reset (SAS): Calibrates the steering wheel to the straight-ahead position, or recalibrates the SAS after steering component replacement.
• DPF Regeneration: Performs DPF regeneration, component replacement initialization, and DPF relearning after engine control unit replacement — for diesel particulate filter systems.
• Injector Coding: Relearns the injector control parameters when an injector is renewed or replaced.
• ABS Bleeding: Bleeds air from the system to restore ABS brake response, or performs a relearn procedure after ABS replacement.
• Air Suspension Service: Supports calibration, height adjustment, system reset, and fault code clearing for air suspension systems. Lets you precisely set ride height, perform system initialization, and resolve common air suspension faults.
• Battery Management Service (BMS): Evaluates the battery charge state, monitors closed-circuit current, registers battery replacement, and activates the vehicle’s sleep mode.

40 High-Level Functions — For professional technicians

▸ 40 High level service functions for professional technicians.

• TPMS Reset: Allows you to look up the tire sensor IDs from the vehicle’s ECU, inputting TPMS sensor replacement IDs and testing sensors.
• Air Conditioner Service: Supports routine maintenance of A/C modules, including A/C system adaptation reset, compressor reset, compressor break-in, and stepper motor initialization.
• Head Lamp Service: Initializes the adaptive headlamp system.
• Body Stability Control Service: Supports routine maintenance of DSC modules, including resetting or deleting adaptation values, and initializing the unit.
• Engine Control Service: Supports routine maintenance of engine modules, including resetting or deleting adaptation values, and calculating fuel consumption.
• Transmission Control Service: Supports routine maintenance of transmission modules, including resetting adaptation values and transmission fluid level adaptation.
• Air-Bag Reset: Resets airbag data to clear the airbag (SRS) warning light after a collision.
• Seat Service: Calibration after repairing or replacing the seat position drive motor.
• Immobilizer Service: Performs anti-theft Matching, disable any lost keys and add new keys. ONLY for vehicles with basic Immobilizer system.
• Engine Idle Service: Adjusts the engine idle speed.
• Door-Window-Roof: Learns the top position of the door window glass, enabling pinch protection and the one-touch-up function.
• Fuel Pump Service: Activates the fuel pump after replacement.
• Air Filter Control Service: Initiates the self-learning process after replacing the air filter.
• ODO Meter Reset: Reads odometer values stored in multiple ECUs (for service and verification purposes).
• Door Service: Performs full calibration after window lift motor repair or replacement.
• Turbocharger: Performs turbocharger learning after component replacement, or resets stored learned values.
• Exhaust Gas Recirculation: Recirculates a portion of engine exhaust gas back into the intake system.
• Engine Cylinder Service: Performs inspection, maintenance and diagnosis of the engine cylinder system.
• Engine Correction Service: Performs engine module data calibration.
• AdBlue: Resets the AdBlue (urea) level counter after the diesel exhaust fluid is refilled or replaced.
• Clutch Matching: Learns the clutch contact point and engagement position where the clutch begins to transmit engine torque. Applicable after ECU replacement, transmission removal/replacement, or clutch replacement. For adaptive clutches only.
• Electronic Water Pump: Activates the electronic water pump for testing or after replacement.
• Crankshaft Learning: Performs crankshaft position learning and related calibration after engine repair.
• High Voltage Battery: Supports EV/hybrid high-voltage battery maintenance, including replacement adaptation and status monitoring.
• Cruise Control System: Performs adaptive cruise control (ACC) calibration and personalization.
• Language Setting: Changes the vehicle’s system language.
• Radar/Camera: Performs radar and camera learning and calibration (ADAS).
• Vehicle Setup: Personalize your vehicle’s driving and comfort preferences.
• Speed Limit Assist: Sets or removes the vehicle’s maximum speed limit.
• Head-Up Display: Used for learning and calibration of heads-up display.
• Cylinder Misfire Check: Identifies engine misfires, addressing issues like sluggish acceleration, high fuel consumption and severe vibration.
• Control Unit Reset: Performs full reset and initialization of vehicle control units after part replacement or fault repair, clearing stored data and restoring normal module operation.
• O2S (Oxygen Sensor): Supports oxygen sensor replacement adaptation and initializes the three-way catalytic converter learned values.
• Seat Belt: Performs seatbelt pretensioner reset and related maintenance after airbag deployment.
• Gas Particulate Filter: Performs service operations including GPF replacement and regeneration.
• NOx Sensor: Resets NOx sensor-related learned values (e.g., catalytic converter parameters) stored in the ECU.
• Rain-Light Sensor: Calibrates the rain sensor after windshield replacement or sensor renewal.
• Stop And Start: Set up the automatic start-stop function in ECU.
• Mileage Verification: Checks and compares odometer data stored across multiple ECUs to detect mileage tampering.
• VIN Verification: Reads and matches the VIN across all vehicle ECUs to detect inconsistencies or unauthorized module replacement.

• Oil Reset
• DPF Regeneration
• EPB/Brake-Pad Reset
• Steering Angle Reset (SAS)
• Battery Management Service (BMS)

Additional service functions are available in the Miscellaneous section. ⚠ Compatibility Notice: The specific diagnostic service functions vary by vehicle brand, model, production year, and ECU configuration.

10 Powerful Full-Systems Diagnostics

Every module the dealer sees — engine to airbag.

In addition to the four standard systems (Engine, ABS, Airbags, and Transmission), the JP V4.0 provides diagnostic coverage for more complex vehicle systems.

• Read and Clear DTCs: Pull and clear diagnostic trouble codes across every available module.
• Read ECU Information: Read control-unit part numbers, software versions and status.
• Read Live Data: Stream live sensor readings in clear on-screen lists.
• Access all ECU modules via OBDII-16 DLC: Reach every onboard module through the standard 16-pin port.
• Read and Clear Freeze Frame Data: Capture the snapshot stored at the moment a fault was set.

• Read Fault Codes
• Live Data
• Access All ECU Modules

11 Full OBD2 Test Modes — Emission-Ready

Ten OBD2 modes, one clean emissions check.

Supports all 10 OBD2 test modes for vehicles compliant with 1996+ OBDII/EOBD/JOBD/KOBD/CAN/CAN-FD standards: Read Codes, Erase Codes, I/M Readiness, Live Data, Freeze Frame, Vehicle Information, O2 Monitor Test, On-Board Monitor Test, EVAP System Test, and Pending Codes.

• 01: Read Codes
• 02: Erase Codes
• 03: I/M Readiness
• 04: Live Data
• 05: Freeze Frame
• 06: Vehicle Information
• 07: O2 Monitor Test
• 08: On-Board Monitor Test
• 09: EVAP System Test
• 10: Pending Codes

12 Supports Diagnostic History and Report printing

Save it, share it, print it — a clean record every time.

Users can quickly access previously tested vehicle systems and save, share, and print diagnostic reports.

• Diagnostic History & Reports: Quickly revisit previously tested vehicle systems and save, share, and print diagnostic reports.
• Feedback & PC Printing: Use the Feedback function to report issues encountered during use — our technical team will review and provide assistance. Diagnostic data can also be printed for future reference by connecting the device to a Windows PC via USB.

13 Product Specifications

The complete technical rundown.

• Operating System: Android
• Processor: Quad Core 1.3 GHz
• Storage: 64GB
• Display: 5-inch LCD capacitive touchscreen with 854x490 resolution
• Connectivity: USB 2.0 / Wi-Fi (2.4GHz) / OBDII
• Power: 9-18V
• Operating Current: ≤500mA
• Battery Capacity: 3.7V 5000mAh 18.5Wh
• Tested Battery Life: Around 6 hours of continuous use
• Type C Input: 5V / 2A
• Power Consumption: 500mA (LCD on with default brightness, Wi-Fi on) @3.7 V
• Operating Temp.: 0 to 50°C (32 to 122°F)
• Storage Temp.: -20 to 70°C (-4 to 158°F)
• Operating Humidity: 5% - 95% non-condensing
• Dimensions (W x H x D): 200 × 116 × 30.2 mm (7.87 × 4.57 × 1.19 in)
• Net Weight: ≈ 380 g
• Supported Automotive Protocols: ISO 9141-2, ISO 14230-2, ISO 15765, K/L-Line, Flashing Code, SAE-J1850 VPW, SAE-J1850 PWM, ISO 11898 (High-speed, Medium-speed, Low-speed, and Single-wire CAN), CAN-FD, SAE J2610, GM UART, UART Echo Byte Protocol, Honda Diag-H Protocol, TP2.0, TP1.6

14 Packing List

Open the case — everything you need to start.

• Main Unit (x1): JP V4.0 Main Unit (Diagnostic Tablet)
• Protection (x1): Carry Case
• Interface (x1): OBD2 Main Cable (16-pin)
• Cable (x1): USB-C Cable
• Document (x1): Multi-Language User Manual

ℹ️ Note: Use the charger you already own — no extra e-waste. The JP V4.0 can be charged using any standard USB-C charger (5V/2A recommended) or a computer’s USB port.

Good to know before you buy.

• Is the software updated regularly? Are updates free?: Yes! The iCarsoft JP V4.0 includes lifetime free software upgrades via Wi-Fi. There are zero annual subscription fees or hidden costs. You pay once and get continuous software updates forever.
• The JP V4.0 cannot recognize my vehicle by AutoVIN, does it mean the device is faulty?: Not at all. AutoVIN depends on individual vehicle ECU protocols. If AutoVIN skips your car, simply use the Manual Selection mode—all diagnostic and service functions will work perfectly. Meanwhile, please send your VIN to our support team; we will verify it and add it to our database in the next software update.
• DTCs can be read normally but fail to be cleared or reappear after clearance, why?: Please keep ignition on and engine off. Record freeze frame data first before clearing codes. Persistent hardware faults need physical repair prior to code clearance. Some fault codes of systems like SRS and ABS can only be cleared after finishing bidirectional tests.
• The scanner powers on but fails to establish a diagnostic connection. What causes this issue?: Please check the following steps to troubleshoot:
  • Check Vehicle Compatibility: Ensure your vehicle is covered by the JP V4.0, please kindly refer to the vehicle coverage of JP V4.0.
  • Turn Off Power-Saving: Disable any eco/battery-saving modes on the vehicle that might shut down modules during diagnosis.
  • Update Device: Connect to Wi-Fi and update both the firmware and vehicle software to the latest versions.
  • Check Ignition: Ensure the vehicle key is turned to the “ON” position.
• What’s the difference between JP V4.0 and the older JP V3.0?: The JP V4.0 is the upgraded successor to the JP V3.0. It transforms the traditional button-operated scanner into a smart 5″ Android touchscreen device, adding convenient one-click Wi-Fi updates and advanced ECU coding—all without needing a PC.

Choose the iCarsoft JP V4.0 for comprehensive Asian vehicle diagnostics, advanced testing capabilities and convenient wireless software updates with lifetime free upgrades. Its 5,000mAh battery supports approximately six hours of continuous use, while diagnostic history and report-printing features help keep service records accessible. ECU coding and service functions depend on the vehicle make, model, year and system configuration. Please confirm vehicle compatibility and specific function support before purchasing.