VDIAGTOOL VD30 Pro OBDII/EOBD Code Reader User Manual

Safety Information

To ensure your safety and prevent damage to the device or vehicle, please carefully read and follow all instructions in this manual before use.

When operating the device, always verify proper testing procedures and strictly adhere to the instructions provided. As automotive electrical systems may vary, you must assess potential risks and ensure a safe testing environment.

Always observe all safety warnings, use appropriate tools, and disconnect power sources when necessary. Improper operation may result in personal injury, equipment damage, or voided warranty.

Safety Messages

Safety messages use standardized signal words to indicate hazard levels and prevent injuries or equipment damage:

DANGER

Will result in death or serious injury if ignored. Indicates an immediately life-threatening hazard.

WARNING

Could result in death or serious injury if ignored. Indicates a potentially dangerous situation.

Safety Instructions

This manual covers known safety hazards but cannot anticipate all possible risks. You are responsible for ensuring safe operating conditions and procedures.

DANGER

• Always ventilate the service area when the engine is running or use a building exhaust removal system if available.
• Carbon monoxide is odorless and deadly - it can cause loss of consciousness or death.

WARNINGS

• Always conduct testing in a safe, controlled environment.
• Wear ANSI-approved safety goggles during all operations.
• Keep all objects away from moving or hot engine components.
• Ensure proper ventilation to avoid toxic exhaust fumes.
• Secure the vehicle in PARK (automatic) or NEUTRAL (manual) with the parking brake engaged.
• Place wheel chocks and never leave the vehicle unattended during tests.
• Exercise extreme caution around ignition systems - hazardous voltages are present.
• Maintain an ABC-rated fire extinguisher within immediate reach.
• Never connect/disconnect test equipment with the ignition on or engine running.
• Keep all test equipment clean, dry, and free from contaminants.
• Never operate test equipment while driving - focus solely on testing.
• Strictly follow the vehicle service manual's diagnostic procedures.
• Verify full battery charge and secure DLC connections before testing.
• Never place test equipment near the distributor due to EMI risks.

Legal Information

Trademarks

VDIAGTOOL is a registered trademark of Shenzhen VDIAGTOOL Technology Co., Ltd in the United States and other jurisdictions. All other product names mentioned herein may be trademarks of their respective owners.

Copyright Information

© 2017 Shenzhen VDIAGTOOL Technology Co., Ltd. All rights reserved. No reproduction, distribution, or transmission of this manual is permitted without express written authorization from VDIAGTOOL. This prohibition applies to all forms of copying including electronic, mechanical, photocopying, and recording.

Disclaimer & Liability Statement

Product Documentation Notice

All illustrations, specifications, and technical data in this manual are for reference only and subject to change without notice.

For the latest documentation, visit: https://www.vdiagtool.com/support/downloads

Limitation of Liability

VDIAGTOOL expressly disclaims all liability for:

• Any direct, indirect, incidental, or consequential damages.
• Loss of profits or business interruption.
• Product modifications or unauthorized use.

This manual does not:

• Modify existing purchase/lease agreements.
• Create additional liabilities for VDIAGTOOL.
• Constitute additional product warranties.

IMPORTANT: Always consult this manual before operation, with special attention to all safety warnings. VDIAGTOOL reserves the right to modify product specifications at any time.

Product Support & Training Resources

Technical Support

• Official Website: www.vdiagtool.com
• Support Email: support@vdiagtool.com
• US Hotline: +1-213-355-7171
• Online Form: https://www.vdiagtool.com/support/tech-support

Training Videos

Free product operation videos:

1. Visit Training Center: https://www.vdiagtool.com/support/training-center
2. Select Code Reader category.
3. Watch model-specific tutorials.

General Information

On-Board Diagnostics (OBD) II

The first generation of On-Board Diagnostics (OBD I) was introduced by the California Air Resources Board (ARB) in 1988 to monitor basic emission control components in vehicles. With advancements in technology and the need for enhanced diagnostics, a more sophisticated system--OBD II--was developed.

OBD II continuously or periodically monitors emission control systems and critical engine components through specialized tests. If an issue is detected, the system activates a Malfunction Indicator Light (MIL) on the dashboard, typically labeled "Check Engine" or "Service Engine Soon." ?

Additionally, OBD II records essential diagnostic data to assist technicians in identifying and resolving problems efficiently.

Key information includes:

• MIL Status: Whether the warning light is activated ("on") or deactivated ("off").
• Diagnostic Trouble Codes (DTCs): Specific error codes stored in the system.
• Readiness Monitor Status: The completion status of emission-related self-tests.

Diagnostic Trouble Codes (DTCs)

Diagnostic Trouble Codes (DTCs) are alphanumeric codes stored by the vehicle's OBD II system when a malfunction is detected. These codes help pinpoint the source of a problem, serving as a guide for troubleshooting.

An OBD II DTC follows a 5-character format:

• First character (letter): Indicates the affected system: P = Powertrain (Engine/Transmission), B = Body (e.g., Airbags, Climate Control), C = Chassis (e.g., ABS, Stability Control), U = Network/Communication (e.g., CAN Bus).
• Remaining four digits: Specify the exact issue.

DTC Breakdown Description

The DTC structure can be broken down as follows:

• System Indicator: The first letter denotes the system: P (Powertrain), B (Body), C (Chassis), U (Network/Communication).
• Code Type: SAE standard codes start with 0 (e.g., P0xxx), while manufacturer-specific codes start with 1, 2, or 3 (e.g., P1xxx, P2xxx, P3xxx).
• Sub-systems: The second digit indicates the sub-system: 1 = Fuel and air metering, 2 = Ignition system or engine misfire, 3 = Auxiliary emissions controls, 4 = Vehicle speed control and idle controls, 5 = Computer output circuits, 6 = Transmission control circuits.
• Specific Component: The last two digits identify the individual component or circuit within the system.

Location of the Data Link Connector (DLC)

The Data Link Connector (DLC), also known as the Diagnostic Link Connector, is a standardized 16-pin port used to connect diagnostic scan tools to the vehicle's onboard computer.

Typical DLC Locations:

• Most vehicles: Within 12 inches of the dashboard center, typically under or near the driver's side.
• Some Asian/European models: Behind the ashtray (may require removal for access).
• If not visible: Check for a location label or consult the vehicle's service manual.

[Diagram Description: Typical DLC locations shown include the left corner of the dash, near the center of the dash, and behind the ashtray.]

Using the Code Reader

This section describes the external features, ports, and connectors of the code reader.

Control Buttons

[Diagram Description: The code reader features several control buttons for navigation and function access.]

• ESC button: Returns to the previous screen; press once to exit other tests.
• Up button: Menu navigation up; previous page in multi-screen info; edits DTC characters.
• DTC button: Direct access to the Read DTC function.
• Left button: Previous page in multi-screen info; navigate character positions.
• OK button: Confirms selection.
• Right button: Next page in multi-screen info; navigate character positions.
• I/M button: Checks emissions readiness and drive cycle status.
• Down button: Menu navigation down; next page in multi-screen info; edits DTC characters.
• Help button: Opens the help menu.

Included Accessories

• Type-C Cable: For computer connection and firmware updates.
• User Manual: Complete operation instructions.

Technical Specifications

• Display: 2.8" TFT color
• Operating Temperature: 0°C to 60°C (32°F to 140°F)
• Storage Temperature: -20°C to 70°C (-4°F to 158°F)
• Connection: Wired via main cable
• Power Source: Vehicle DLC port or Type-C connection
• Compatibility: OBDII & EOBD (12V) vehicles
• Dimensions: 6.5"x3.48"x1.02"
• Weight: 7.69 oz

Getting Started

Power on your code reader by connecting to vehicle power or a computer before using any applications.

Power Connection Methods

Vehicle Power Connection (Recommended)

1. Locate the vehicle's DLC (typically under the dashboard).
2. With ignition ON, connect the code reader to the DLC.
3. The device will auto-power on.

Important: ? Never use Type-C power during vehicle communication. Ensure clean connector contact.

Computer Connection (For Updates/Data Transfer)

1. Connect the Type-C cable to the device and computer.
2. The device will auto-power on.

Application Overview

Upon startup, the following preloaded applications are available:

• OBDII/EOBD: Accesses OBDII screen for all nine OBD system tests.
• Battery: Tests and displays the vehicle battery voltage. ?
• DTC Lookup: Provides access to the diagnostic trouble code lookup screen.
• Setting: Allows modification of settings like Language, Unit of Measure, etc. ⚙️
• Review: Accesses tested data files.
• Print: Accesses the printing function.

OBDII/EOBD

Selecting the OBDII/EOBD application from the home screen displays the vehicle's diagnostic information.

Press [OK Button] to access the diagnostic menu with the following available tests:

• Read DTC
• Clear DTC
• Live Data
• Freeze Frame
• MIL Status
• Vehicle Info
• O2 Sensor
• Mode 6
• Mode 8

Read DTC

This function allows you to check stored fault codes in the vehicle's control modules.

Available Code Types:

• Stored DTCs
• Pending DTCs
• Permanent DTCs
• Record DTC

Stored DTCs

Stored DTCs are active fault codes stored in the vehicle's ECU when the onboard diagnostic system confirms a problem. These codes typically illuminate the check engine light (MIL) ? immediately. Current DTCs can be cleared using the code reader's erase function, though some may clear automatically after several problem-free drive cycles if the issue doesn't recur.

Pending DTCs

Pending DTCs are temporary fault codes stored when a potential issue is first detected. They do not turn on the check engine light immediately. The system keeps them as a warning; if the problem recurs on the next drive, they become confirmed trouble codes. Pending codes can be cleared with the code reader or disappear automatically if the issue doesn't recur after several driving cycles. They are useful for spotting intermittent problems early or checking if a repair was successful.

Permanent DTCs

Permanent DTCs are fault codes severe enough to trigger the check engine light (MIL) ?, and they remain stored even after the light turns off. They preserve a record of the fault. They automatically erase only after: (1) the underlying issue is fully repaired, and (2) the system successfully completes 3 consecutive drive cycles without detecting the fault.

Stored DTC (Record Function)

This function allows you to record DTCs if trouble codes are present in the vehicle.

To read codes from a vehicle:

1. Select "Read DTC" from the OBDII/EOBD menu using the arrow keys [Up Arrow]/[Down Arrow], then press [OK Button].
2. Choose the code type (Stored, Pending, or Permanent DTCs) and confirm with [OK Button].
3. The tool will display all detected codes along with their descriptions.

Clear DTC

This function allows you to clear stored diagnostic trouble codes (DTCs) from the vehicle's ECU with the ignition ON (engine OFF).

To erase codes from a vehicle:

1. Select "Clear DTC" from the OBDII menu.
2. Follow the on-screen prompts to confirm and complete the erasure.
3. Immediately rescan the system to check for remaining codes.

After Erasure: If codes persist, this may indicate permanent DTCs. Repair or replace affected components before attempting to clear codes again.

Live Data

This function allows real-time monitoring of vehicle sensor data and system parameters (PIDs) from the ECU.

Options include:

• View All Items
• Select Items
• View Graphic Items
• Record All
• Record Select

View All Items

Displays real-time monitoring of all available vehicle parameters from the ECU, including engine RPM, coolant temperature, fuel trim values (short-term and long-term), oxygen sensor voltages, throttle position, and other critical system measurements.

Select Items

Enables focused monitoring of specific vehicle parameters.

To view selected PIDs:

1. Navigate through the parameter list using the [Up Arrow]/[Down Arrow] buttons.
2. Press [OK Button] to select/deselect each desired parameter.
3. Press [ESC Button] to display all selected parameters in real-time.

View Graphic Items

Allows you to view PID data as a graph.

[Diagram Description: A graph interface for Live Data is shown, displaying parameters like MIL-DIST, WARM-UPS, EVAP-PCT, CLR-DIST, with axes for values and time/samples.]

Record All

Used to record PIDs to help diagnose intermittent drivability problems that cannot be determined by other methods.

Record Select

Allows you to record the PID data you selected.

CAUTION: ⚠️ Always park the vehicle before using the code reader. When recording live data during driving, ensure two occupants are present: one to drive and one to operate the device.

NOTE: Vehicle communication speeds and supported PIDs vary by make/model/year. Some parameters may not be available on all vehicles.

Freeze Frame

The Freeze Frame function provides a snapshot of critical vehicle parameters (engine RPM, load, fuel system status, etc.) recorded at the moment a fault code was triggered. This data helps diagnose intermittent issues by showing exact operating conditions when the problem occurred.

To access freeze frame Data:

1. Select Freeze Frame from the OBDII menu.
2. Scroll through recorded parameters using [Up Arrow]/[Down Arrow] buttons.
3. View detailed condition readings for each parameter.

Note: If no data is available, the display will show "No freeze frame data stored".

MIL Status

This function shows detailed information, such as the Check Engine Light (MIL) ? status, the Run Time with Check Engine Light on, and the Distance with Check Engine Light on.

[Diagram Description: The MIL Status screen displays "Check Engine Light Status" (OFF), "Run Time with Check Engine Light On" (with fields for Day, Hours, Minutes), and "Distance with Check Engine Light On" (with fields for KM/Miles).]

Vehicle Information

Retrieves the vehicle's VIN number, calibration IDs (identifying control module software versions), and calibration verification numbers (CVNs). CVNs are values calculated according to OBDII regulations to verify if emission-related calibrations have been modified.

Note: Multiple CVNs may be reported for a single control module, and the calculation process may take several minutes. Available options vary depending on the connected vehicle.

O2 Sensor

Opens a menu of tests available for checking the integrity of oxygen sensors. Making a selection displays all pertinent O2S parameters for the specific test.

On-Board Monitoring (Mode 6)

The On-Board Monitoring (Mode 6) function is useful after servicing or after clearing a vehicle ECU's memory. It receives test results for emission-related powertrain components and systems that are not continuously monitored (for Non-CAN vehicles) or that are and are not continuously monitored (for CAN vehicles). Vehicle manufacturers assign test and component IDs.

NOTE: Test results do not necessarily indicate a faulty component or system.

To request On-board Monitor Test (Mode 6) results:

1. Use the [Up Arrow]/[Down Arrow] keys to highlight "On-board Monitor Test (Mode 6)" from the OBDII/EOBD menu and press the [OK Button].
2. A screen will show a list of test groups, such as: Catalyst Monitor B1, VVT Monitor, Sensor Heater B1-S1, Sensor Heater B1-S2, Misfire Cylinder 1, etc.
3. Use the [Up Arrow]/[Down Arrow] keys to highlight a test group and press the [OK Button] to confirm. A screen with details of the selected sensor displays. Use the [Up Arrow]/[Down Arrow] arrow keys to scroll through data to select lines.

EVAP System Test (Mode 8)

The EVAP System Test (Mode 8) allows the code reader to control vehicle components and test systems.

EVAP (Evaporative Emission Control System) is designed to prevent fuel vapor from escaping into the atmosphere, reducing air pollution. Its main functions include:

• Preventing Fuel Vapor Leakage: Captures and stores fuel vapor.
• Storing Vapor: Uses a fuel vapor canister.
• Recycling Vapor: Directs stored vapor back to the combustion chamber for re-burning.
• Monitoring for Leaks: Uses sensors to detect pressure changes.
• Improving Fuel Efficiency: Contributes to better fuel economy by reusing vapors.

NOTE: ? Some manufacturers do not allow tools to control vehicle systems. The manufacturer sets the criteria to automatically stop the test. Refer to the appropriate vehicle service manual before using this function.

I/M Readiness

I/M Readiness, or Inspection and Maintenance Readiness, refers to the status of a vehicle's on-board diagnostic (OBD) system's readiness to perform emissions testing. It indicates whether emissions-related systems have completed their self-diagnostic checks, which is crucial for passing state emissions inspections.

Monitor Status indicators:

• OK: Test completed successfully.
• INC (Incomplete): Test not yet finished (needs more driving).
• N/A (Not Applicable): Monitor is not required/supported for the specific vehicle.

There are two types of I/M Readiness tests:

• Since DTCs Cleared: Shows monitor status since the last time diagnostic trouble codes (DTCs) were cleared.
• This Drive Cycle: Shows monitor status since the beginning of the current driving cycle.

The code reader supports the following standard OBDII monitor abbreviations and full names:

NOTE: ? To check I/M Readiness status, ensure the ignition is ON (engine OFF). Monitor availability varies by vehicle specifications.

To retrieve I/M Readiness Status data using the I/M Readiness hotkey:

1. Press the [I/M Button] hotkey on the keypad.
2. The screen displays I/M Readiness status, including MIL status, DTC count, and individual monitor readiness (MIS, FUEL, CCM, CAT, HCAT, EVAP, AIR, O2S, HRT).

[Diagram Description: The I/M Readiness screen shows status indicators for various monitors. It also features colored LED indicators and a beeper for reminders.]

LED Indicators:

• Yellow: Indicates a possible problem. This could mean Pending DTCs exist (check I/M Readiness test results and use Read Codes function) or some emission monitors have not run properly. If no DTCs are shown but the Yellow LED is on, it indicates a "Monitor Has Not Run" status.
• Red: Indicates problems exist with one or more vehicle systems, and the vehicle is not ready for an Emissions Test. DTCs are also found. The MIL lamp ? on the vehicle's instrument panel will light steady. The issue causing the Red LED should be fixed before an Emissions Test or further driving.

NOTE: The built-in beeper provides different tones corresponding to different LED indicators, useful when testing while driving or in bright areas.

Battery

This function provides real-time battery voltage monitoring.

[Diagram Description: The Battery screen displays "Battery Volt" with a value, e.g., "12.1V", and a status message like "Normal battery voltage, good battery status." ?]

DTC Lookup

This function provides instant access to the built-in diagnostic trouble code database, containing both SAE standard and manufacturer-specific code definitions.

To Search for DTC Definitions:

1. Select "DTC Lookup" from the main menu.
2. Enter the code using: [Left Arrow]/[Right Arrow] to navigate character positions; [Up Arrow]/[Down Arrow] to change digit values; [OK Button] to confirm.
3. View the code definition.

Note: For manufacturer-specific codes (P1xxx/C1xxx/B1xxx/U1xxx), select the vehicle make. If no definition is found, consult the vehicle service manual.

Setting

This menu allows customization of the code reader's configuration.

Available Options:

• Language - Select display language.
• Unit of Measure - Choose metric/imperial units.
• Self Tests - Run device self-test.
• Help - Access device information.
• Beep - Turn beep on or off.

Language

Selecting Language opens a screen that allows you to choose the system language.

To configure system language:

1. Select Language from the Settings menu.
2. Choose your desired language from the available list.
3. Confirm selection with [OK Button].

Unit of Measure

This setting allows switching between measurement systems:

Available Options:

• Metric (km/h, °C)
• US Customary (mph, °F)

Configuration Steps:

1. Select Unit of Measure from the Settings menu.
2. Choose preferred system.
3. Confirm with [OK Button].

Self Tests

This feature verifies proper operation of the device hardware components.

Available Tests:

• Keys Test
• TFT Test
• LED Test

Keys Test

Selecting the Keys Test option opens a screen to check keypad functionality.

To test the keypad:

1. Select Key Test from the Self-Test menu.
2. Press any button - the display will show the button name.
3. Double-press [ESC Button] to exit.

TFT Test

Selecting the TFT Test option opens a screen to check screen functionality.

To test the screen:

1. Select TFT Test.
2. Visually inspect for: Dead pixels, Color uniformity.
3. Press [ESC Button] to complete.

LED Test

Selecting the LED Test option opens a screen to check LED functionality.

To test the LED:

1. Select LED Test.
2. All status LEDs will illuminate sequentially.
3. Press [ESC Button] to terminate.

Help

Access this section for essential product information and diagnostic references.

Available Resources:

• Device Information
• About OBD
• About Data Stream

Tool Information

This option shows information about your code reader, such as hardware and software version.

About OBD

This option shows what OBD is, OBDII modes, and vehicle coverage.

About Datastream

This option shows brief introductions about each sensor and module.

Beep

Opens a settings dialog to enable/disable the keypress sound from the built-in speaker.

Review

This function provides access to all recorded diagnostic data through the following menu options:

• Review DTC
• Review Datastream
• Review Freeze Frame
• Delete DTC Data
• Delete Datastream
• Delete Freeze Frame

To review or delete recorded data:

1. Select Review from the main menu.
2. Navigate through the six options using [Up Arrow]/[Down Arrow] buttons.
3. Press [OK Button] to view or delete selected data.

Updating

Updating the Code Reader

1. Download and install the VD30 Pro Update Client from https://www.vdiagtool.com/support/downloads.
2. Launch the VD30 Pro Update Client.
3. With the device powered off, hold the [Down Arrow] button while connecting via USB-C until "UPDATE MODE" appears on the screen.
4. Click the "Upgrade" button in the client software and wait for completion.

[Diagram Description: The VD30 Pro Update Client software interface is shown, with fields for Language, Port, and buttons for Upgrade, Print, Manual. Prompt messages guide the user through entering upgrade mode.]

Printing

This function transfers saved diagnostic data to your computer as a .txt file for printing.

Steps:

1. Open the VD30 Pro software and connect the device to your computer.
2. Click "Print" in the software.
3. On the device, select the test results to print and confirm.
4. The data will transfer as a .txt file.
5. Click "Open File" in the software to locate and print the report.

[Diagram Description: The VD30 Pro software interface is shown with options for Upgrade, Print, Manual, and Language selection. Prompt messages guide the printing process.]

Manual

A copy of the user manual in PDF format will show up when you click this option.

Software Language Setting

This option allows you to set the language of the update client.

[Diagram Description: The VD30 Pro Update Client software interface is shown with a dropdown menu for Language selection, including options like English, Français, Español, Deutsch, Italiano, Polski, Português, Čeština, Türkçe.]

Warranty

Limited Three Years Warranty

This warranty is expressly limited to buyers who purchase VDIAGTOOL VD30 Pro product for purposes of resale or use in the ordinary course of the buyer's business. VDIAGTOOL VD30 Pro is warranted against defects in materials and workmanship for three years (36 months) from the date of delivery to the buyer. This warranty does not cover any part that has been abused, altered, used for a purpose other than for which it was intended, or used in a manner inconsistent with instructions regarding use. The exclusive remedy for any tool found to be defective is repair or replacement, and VDIAGTOOL shall not be liable for any consequential or incidental damages.

Contact Us

Warranty & Support Email: support@vdiagtool.com

Website: www.vdiagtool.com

For wholesale business or to become a distributor:

Email: sales@vdiagtool.com

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Email: marketing@vdiagtool.com

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