UDIAG A300 OBD2 Scanner Diagnostic Tool

1. Introduction

The UDIAG A300 is a professional automotive diagnostic tool designed to assist in identifying and resolving issues across various vehicle systems. This device offers comprehensive OBDII functions, along with specialized diagnostic capabilities for Engine, Transmission, ABS, and SRS systems, and includes several essential reset services. It is suitable for individual car owners, DIY enthusiasts, and professional automotive technicians.

2. What's in the Box

• Professional Diagnostic Tool (UDIAG A300)
• OBD II Cable
• TF Card Reader
• Protective Case
• User Manual

Figure 2.1: UDIAG A300 Diagnostic Tool and Accessories in Protective Case

3. Product Overview

The UDIAG A300 features a 4.3-inch industrial-level color screen for clear display of diagnostic data. It is designed for ease of use with a plug-and-play interface and one-key diagnosis functionality. The device supports over 60 car makes and more than 100,000 vehicle types, including most US vehicles from 1996 onwards, EU vehicles from 2002 onwards, and Asian vehicles from 2005 onwards, as well as other OBDII and CAN compliant vehicles.

Figure 3.1: UDIAG A300 Diagnostic Tool

Figure 3.2: Multi-language Support

Figure 3.3: Vehicle Compatibility Map

Product Demonstration Video

4. Setup

4.1 Initial Connection

1. Locate the OBDII port in your vehicle. This is typically found under the dashboard on the driver's side.
2. Connect the OBD II cable from the UDIAG A300 to the vehicle's OBDII port.
3. Turn the vehicle's ignition to the 'ON' position (engine off). The A300 will power on automatically.
4. The device will automatically identify your car's model and year and begin the diagnostic process.

4.2 Software Updates

To ensure optimal performance and access to the latest vehicle data and functions, it is recommended to regularly update the A300's software. The device is compatible with Windows computers for updating.

Figure 4.1: Software Update Overview

1. Download the update tool from the official UDIAG website.
2. Install the software on your Windows laptop or desktop.
3. Open the UDIAG application and register an account if you haven't already.
4. Log in to your UDIAG account.
5. Take out the SD card from the A300's card slot.
6. Insert the SD card into your computer using the provided TF card reader.
7. Activate your A300 device within the software.
8. Choose the car makes or special functions you wish to update and wait for the downloads to complete.
9. Put the SD card back into the A300. The device is now updated and ready for use.

Figure 4.2: Detailed Software Update Steps

5. Operating Instructions

5.1 Full OBDII Functions

The UDIAG A300 provides comprehensive OBDII diagnostic capabilities to quickly identify engine system faults. These functions include:

• Read Codes: Retrieves current, permanent, and pending diagnostic trouble codes (DTCs).
• Clear Codes: Erases DTCs and turns off the Malfunction Indicator Light (MIL) after repairs.
• Live Data Stream: Displays real-time data from vehicle sensors in text and graph formats, aiding in quick analysis.
• Freeze Frame Data: Captures a snapshot of operating conditions at the time a fault code was set.
• I/M Readiness: Checks the readiness of the emission monitoring systems.
• O2 Monitor Test: Retrieves O2 sensor monitor test results.
• On-Board Monitor Test: Retrieves test results for emission-related powertrain components and systems.
• Component Test: Allows initiation of a leak test for the vehicle's EVAP system.
• Vehicle Information: Retrieves the Vehicle Identification Number (VIN), Calibration ID (CALID), and Calibration Verification Number (CVN).

Figure 5.1: Fast Diagnosis Function

5.2 Four System Diagnosis (ABS/SRS/ECU/TCM)

The A300 provides in-depth diagnostics for four critical vehicle systems:

Figure 5.2: 4 System Diagnosis Overview

Figure 5.3: Powerful 4 Systems Diagnosis

Engine System Diagnosis (ECU)

When the vehicle's Check Engine Light is on, it indicates a possible defect or fault detected by the car's onboard computer system (OBD System). The A300 can diagnose engine issues such as engine shaking, poor acceleration, or decreased fuel efficiency. It helps identify the reason for abnormal engine operation, including stalling or auto-shutdown during idling or driving. Engine diagnosis is also essential for identifying the cause of emission problems if the vehicle's emissions exceed specified standards.

Figure 5.4: Engine System Diagnosis

Transmission System Diagnosis (TCM)

The A300 can diagnose issues within the Transmission Control Module (TCM). This is crucial if you experience abnormal noises from the gearbox, difficulty shifting smoothly, slipping sensations during shifting, or unusual noises like clunking, grinding, or whirling. It also helps identify issues related to noticeable resistance, hesitation, or loss of power while driving, or fluid leaks in the transmission area. The tool can read fault codes and display live data (e.g., fluid temperature, pump status, clutch actuation, pressure) to ensure optimal transmission performance.

Figure 5.5: Transmission System Diagnosis

Anti-lock Braking System Diagnosis (ABS)

When the vehicle's ABS MIL (Malfunction Indicator Light) turns on, it indicates a potential defect or fault in the ABS. The A300 can read and clear Diagnostic Trouble Codes (DTCs) from the ABS, helping to check various brake components and accurately determine problems. This is important if you experience pedal vibrations, unstable braking, or if the vehicle is not decelerating properly or braked effectively. The tool helps ensure the ABS is working correctly and safely.

Figure 5.6: ABS System Diagnosis

Supplemental Restraint System Diagnosis (SRS)

If the vehicle's SRS MIL turns on, it indicates a defect or fault in the Supplemental Restraint System. The A300 can read and clear fault codes in the SRS (airbag) system and turn off the warning light, ensuring the system functions correctly and safely. In cases of collision, the SRS system may activate and deploy airbags; the A300 helps perform diagnostics to check for damage or malfunctions and verify proper system operation. SRS diagnostic and reset procedures are also required when performing vehicle repairs involving airbag component installation or replacement.

Figure 5.7: SRS System Diagnosis

5.3 Six Reset Services

The UDIAG A300 includes six commonly used reset functions to help maintain your car and save time and money:

Figure 5.8: 6 Main Service Functions Overview

Figure 5.9: Commonly Used Reset Functions

Oil Reset

This function allows you to reset the oil light after an oil change, ensuring accurate calculation of the engine oil life system. Timely oil changes are crucial for protecting your engine.

Figure 5.10: Oil Light Reset

ABS Bleeding

This function is used for maintenance or repair related to brake fluid or components. It helps remove trapped air from the ABS system, which can cause a spongy brake pedal or increased stopping distance. Performing ABS bleeding ensures proper operation of the Anti-lock Braking System and improves braking performance, contributing to vehicle safety.

Figure 5.11: ABS Bleeding

EPB (Electronic Parking Brake) Reset

This service is for resetting the electronic parking brake system. It includes deactivating and activating the brake control system, draining brake fluid, opening and closing brake pads, and setting the brakes after replacing the brake disc or pads. It also helps diagnose EPB caliper function and initialize wear indicators, simplifying the braking process.

Figure 5.12: Enhanced EPB Service

Throttle Reset

Resetting the vehicle's Throttle Position Sensor (TPS) ensures accuracy and proper functioning, leading to improved fuel economy. This function is necessary when the vehicle experiences issues like high or low idle speed, erratic idle, or if the Engine MIL comes on with idle speed-related trouble codes. It is also performed after a throttle body replacement or cleaning to ensure smooth driving.

Figure 5.13: Throttle Reset

TPMS (Tire Pressure Monitoring System) Reset

After a tire sensor replacement, the TPMS function can quickly search the tire sensor ID from the vehicle's ECU. It guides the user through TPMS sensor relearning procedures, resets tire pressure, and turns off the tire pressure MIL. (Note: This function does not support TPMS programming.)

Figure 5.14: TPMS Reset

SAS (Steering Angle Sensor) Calibration

Steering Angle Sensor calibration is critical for ensuring the vehicle's steering system accuracy and stability, which contributes to safe driving and optimal vehicle handling performance. This function allows for erasing the record of the old steering angle sensor and overwriting it with a new one. It is vital to ensure that your steering stays aligned and that the driver-assistance system works properly.

Figure 5.15: SAS Calibration

6. Maintenance

To ensure the longevity and optimal performance of your UDIAG A300 diagnostic tool, consider the following maintenance guidelines:

• Keep the device clean and free from dust and moisture. Use a soft, dry cloth for cleaning.
• Store the device in its protective case when not in use to prevent physical damage.
• Regularly check for and install software updates as described in Section 4.2 to ensure compatibility with new vehicle models and access to the latest features.
• Avoid exposing the device to extreme temperatures or direct sunlight for prolonged periods.
• Handle the OBD II cable with care to prevent damage to the connectors or wiring.

7. Troubleshooting

If you encounter issues while using your UDIAG A300, refer to the following common troubleshooting tips:

• Device Not Powering On: Ensure the OBD II cable is securely connected to the vehicle's OBDII port and the vehicle's ignition is in the 'ON' position. Check the vehicle's fuse for the OBDII port if necessary.
• Communication Error: Verify that the vehicle supports the OBDII protocol. Ensure the cable connection is stable. Try restarting the vehicle and the diagnostic tool.
• Incorrect Readings/Codes: Ensure the software is up to date. Verify the vehicle's VIN is correctly identified by the tool.
• Function Not Supported: Some advanced functions or reset services may not be supported by all vehicle models or years. Refer to the tool's compatibility list or contact UDIAG support for specific vehicle compatibility.
• Screen Issues (Blank/Frozen): Power cycle the device. If the issue persists, ensure the internal ribbon cable (if applicable) is securely seated.

For persistent issues not resolved by these steps, please contact UDIAG customer support.

8. Specifications

9. Warranty and Support

UDIAG is committed to providing high-quality products and customer service. The UDIAG A300 comes with a 3-year free update period, ensuring your device remains current with the latest vehicle data and diagnostic capabilities.

For any questions, concerns, or technical assistance, please contact UDIAG customer support through their official channels. Refer to the product packaging or official UDIAG website for specific contact information.