ANCEL A202 OBD2 On-Board Computer

1. Introduction

The ANCEL A202 OBD mini car trip computer is a compact and powerful vehicle instrument designed to provide real-time monitoring and diagnostic capabilities. It is particularly useful for vehicles that lack built-in displays for critical parameters such as engine temperature, tachometer readings, or detailed fuel consumption data. The A202 enhances your driving experience by offering essential vehicle information and diagnostic tools directly at your fingertips.

Figure 1: ANCEL A202 On-Board Computer

2. Key Features

• Real-time display and monitoring of vehicle battery voltage.
• Monitoring of generator charging voltage.
• Configurable over-speed alarm.
• High engine coolant temperature alarm and monitoring.
• Fuel consumption display and brake test functions.
• Ability to read vehicle data streams.
• Scanning and clearing of engine fault codes (DTCs).
• Shift warning function.
• Multi-function LCD display (2.4 inch color screen).
• Automatic light sensor for display brightness adjustment.

Figure 2: Overview of ANCEL A202 Smartgauge Functions

3. Compatibility

The ANCEL A202 is designed to support all standard OBD2 compliant vehicles. However, it does NOT support vehicles using the J1850 (J1850 PWM, J1850 VPM) protocols. It is crucial to verify your vehicle's protocols before purchase.

3.1 Incompatible Vehicles

The following vehicle types and models are generally NOT supported:

• American Cars (manufactured before 2004): Dodge, Jeep, Ford GM Chrysler, Chevrolet, Cadillac, Mustang, Lincoln.
• European Cars (manufactured before 2005): DS, Peugeot, Citroen, Renault, Alfa Romeo, SAAB, Acura, Opel, Audi, Seat, Bentley, Skoda, Daewoo, Benz, Daihatsu, Land Rover, BMW, Vauxhall, Volvo, Fiat, VW, Ford, Jaguar.
• Asian Cars (manufactured before 2008): KIA (some models before 2007), Isuzu, Honda, Mitsubishi, Hyundai, Dacia, Lexus, Mazda, Nissan, Subaru, Suzuki, Toyota, BYD, Chery, Geely, Great Wall, Karry.
• Other: Oil and electricity mixing vehicles, diesel powered cars, Pick up, SUV, ORV.
• Russian Cars: VAZ, UAZ, LADA.

Figure 3: List of Incompatible Vehicles

4. Package Contents

Upon opening the package, ensure all the following items are present:

• 1 x ANCEL A202 OBD Computer Unit
• 1 x OBD16pin to USB Cable
• 1 x Instruction Paper (this manual)

Figure 4: ANCEL A202 Package Contents

5. Setup

5.1 Installation Steps

1. Locate the vehicle's OBD (On-Board Diagnostics) check port. This is typically found under the dashboard on the driver's side.
2. Insert the OBD16pin connector of the provided cable into the vehicle's OBD port.
3. Insert the USB end of the cable into the data interface on the ANCEL A202 unit.
4. Start your car's engine. The A202 will automatically power on and attempt to establish communication with the vehicle's computer.
5. Once communication is successfully established, the unit will emit a "drop" sound, and the display screen will show vehicle protocols. This indicates that the device is ready for initial parameter setup.

Figure 5: Connecting the ANCEL A202 to your vehicle's OBD port

5.2 OBD-II Connector Pinout

For reference, the standard OBD-II connector pinout is provided below. This diagram can be useful for understanding the connection points, especially during troubleshooting.

Figure 6: Standard OBD-II Connector Pinout

Table 1: OBD2 Pin Description

OBD2 Pin	Description
2	SAE J1850 Bus+
4	Chassis Ground
5	Signal Ground
6	CAN High
7	ISO9141 K Line
10	SAE J1850 Bus-
14	CAN Low
15	ISO9141 L-Line
16	Vehicle Battery Positive

6. Operating Instructions

The ANCEL A202 features a simple interface for easy operation. Use the setting button (scroll wheel) to navigate menus and confirm selections.

Figure 7: Device Controls (Setting Button, OBD Port, Light Sensor)

6.1 Display Modes and Data Monitoring

The A202 can display various real-time data. Short press the setting button to switch between different display modes. Long press to enter settings.

• Coolant Temperature: Displays engine coolant temperature in Celsius.
• Battery Voltage: Shows current battery voltage.
• Speed: Displays vehicle speed in Km/h.
• RPM: Shows engine revolutions per minute.
• Fuel Consumption: Displays real-time fuel consumption (e.g., L/100km).
• Driving Distance: Tracks distance traveled.
• Driving Time: Records driving duration.
• Fault Code Display: Shows active Diagnostic Trouble Codes (DTCs).

Figure 8: Examples of ANCEL A202 Display Modes

6.2 OBD Diagnose Functions

From the main menu, select "OBD diagnose" to access diagnostic features:

• Scan DTCs: Scans the vehicle's system for active Diagnostic Trouble Codes.
• Erase DTCs: Clears detected fault codes from the vehicle's ECU.
• Data Stream: Displays a comprehensive list of real-time data parameters from the vehicle's sensors.

Figure 9: OBD2 Functions: Erase Codes, Read Codes, Data Stream

6.3 Driving Test Functions

The "Driving test" menu provides performance testing options:

• SpeedUp Test: Measures acceleration performance (e.g., 0-100 Km/h).
• Brake Test: Evaluates braking performance, including distance and time.

Figure 10: ANCEL A202 performing driving tests and fault code scanning

6.4 Settings and Alarms

The "Settings" menu allows customization of various parameters and alarm thresholds:

• Engine Size: Set your vehicle's engine displacement (e.g., 1.5L, 2.0L).
• Fuel Type: Select fuel type (Gas, Diesel).
• OverSpeedSet: Configure the speed threshold for the over-speed alarm (e.g., 120 Km/h).
• CoolantAlarm: Set the maximum coolant temperature before an alarm is triggered (e.g., 105°C).
• Shift RPM: Set the RPM threshold for shift warning.
• SleepTimeSet: Adjust the time before the unit enters sleep mode when the engine is off (default 30 seconds).
• KPH Adjust %: Calibrate speed display accuracy.
• VLT Adjust %: Calibrate voltage display accuracy.
• LowVLT Alarm: Set the minimum voltage threshold for a low voltage alarm.
• Digit Cor: Adjust display color (from video, though not explicitly stated in text).
• KPH Zero Set: Zero out speed readings.
• Fuel Adjust %: Calibrate fuel consumption display accuracy.
• Sum Distance: View total accumulated distance.
• Default Set: Reset all settings to factory defaults.

6.5 Product Information

The "Product inf" menu provides details about the device:

• Sys Version: Displays the system software version (e.g., V7.23).
• Protocol inf: Shows the current OBD2 communication protocol being used (e.g., ISO15765).
• Matching inf: Provides information regarding compatibility and potential solutions for abnormal meter behavior (e.g., pin cutting for certain issues).

6.6 Product Demonstration Video

7. Maintenance

To ensure the longevity and optimal performance of your ANCEL A202, follow these maintenance guidelines:

• Keep the device clean and free from dust and debris. Use a soft, dry cloth for cleaning.
• Avoid exposing the device to extreme temperatures, direct sunlight for prolonged periods, or excessive moisture.
• Do not use abrasive cleaners or solvents on the unit.
• Ensure the OBD cable is not kinked or damaged, as this can affect connectivity.
• Store the device in a cool, dry place when not in use.

8. Troubleshooting

8.1 Common Issues and Solutions

Q: Why does the device automatically turn off after a period of time?

A: The default sleep time is 30 seconds. When your engine is turned off, the device will automatically power down after 30 seconds. You can adjust this setting by navigating to "Settings" > "SleepTimeSet" and setting a different duration.

Q: Why are my car dashboard lights or fault alarm lights lit up abnormally when using the device?

A: In some vehicles, using the A202 may cause abnormal dashboard or fault alarm lights. This can often be resolved by modifying the OBD connector. Refer to the "Product inf" > "Matching inf" section on the device for specific instructions. This typically involves carefully cutting off pins 7 and 15 on the OBD connector using needle-nose pliers to eliminate such phenomena.

Figure 11: Troubleshooting guide for abnormal dashboard lights (pin cutting)

8.2 User Tips

• For optimal visibility, place the device on a flat surface on your dashboard where it does not obstruct your view of the road or other vehicle controls.
• Familiarize yourself with the menu structure and settings before driving to ensure safe operation.
• Regularly check for and clear any stored DTCs to maintain vehicle health and prevent potential issues.
• Utilize the alarm functions (over-speed, coolant temperature, low voltage) to receive timely warnings and enhance driving safety.

9. Specifications

Figure 12: ANCEL A202 Product Parameters and Dimensions

10. Warranty and Support

The ANCEL A202 comes with a 1-year warranty and technical support from the manufacturer. For any issues or inquiries, please contact the seller or manufacturer's support channels.