AUTOOL EM355 Flash Reprogramming Power Supply and Battery Charger Instruction Manual

1. Product Overview

The AUTOOL EM355 is a versatile Flash Reprogramming Power Supply and Car Battery Charger designed for automotive professionals. It provides stable voltage for ECU programming, offers multi-stage intelligent battery charging, and includes a battery repair mode to extend battery life. Equipped with advanced safety protections and an HD color display, it ensures reliable and safe operation for various automotive electrical tasks.

Figure 1: AUTOOL EM355 Flash Reprogramming Power Supply. This image shows the main unit with its control panel and carrying handle.

2. Safety Information

Always observe the following safety precautions when operating the AUTOOL EM355 to prevent injury or damage to the device or vehicle:

• Ensure proper ventilation during operation to prevent overheating.
• Connect the battery clamps correctly: red to positive (+), black to negative (-). Reverse polarity can cause damage.
• Avoid short circuits between the battery clamps.
• Do not expose the device to rain or moisture. The unit has an IP21S rating, protecting against dust and minor liquid splashes, but is not waterproof.
• Always disconnect the power supply from the AC outlet before disconnecting the battery clamps from the vehicle.
• Keep the device away from flammable materials.
• In case of emergency, press the red EMERGENCY STOP button immediately.

2.1 Advanced Safety Protections

The EM355 is equipped with 9 protection functions to ensure safe operation:

• Emergency Stop
• Short Circuit Protection
• Overheat Protection
• Overvoltage Protection
• Undervoltage Protection
• Reverse Polarity Protection
• No-Load Protection
• Output Overcurrent Protection
• Output Overvoltage Protection

Figure 2: Visual representation of the 9 advanced safety protections integrated into the AUTOOL EM355 unit.

3. Product Features

3.1 High-Current Programming Mode

Delivers a stable 10.8V–16.0V adjustable output with a 120A max current (sustained for 3 minutes). This mode is ideal for ECU programming, module coding, and ADAS calibrations, ensuring stable voltage without drops that can damage ECUs.

Figure 3: Illustration of the high-current programming mode, showing adjustable voltage settings and stable output for ECU tasks.

3.2 Fast Charging & Smart Charge

Offers multiple charging options: 20A/12V for lead-acid batteries, 40A for in-vehicle battery charging, and 20A for external battery charging. Features a multi-stage intelligent charging mode:

• Early-stage Charging: Uses pulse charging, gradually increasing power for optimal efficiency.
• Mid-stage Charging: Quickly switches to high-power charging for rapid charging.
• Late-stage Charging: Automatically switches to trickle charging and stops when full to prevent overcharging.

Figure 4: Depicts the fast charging mode with indicators for voltage, current, and charging progress, highlighting the 20A/12V lead-acid battery charging capability.

Figure 5: A graph illustrating the multi-stage smart charging process, showing how power adjusts over time during charging.

3.3 Battery Repair

Revives deeply discharged or sulfated batteries, extending battery life and reducing replacement costs. Supports multiple battery types including standard lead-acid, AGM (flat/spiral), EFB, and gel batteries. The EM355 can repair batteries that have been discharged for a long time or suffered severe power loss.

Figure 6: Shows the battery restoration function, demonstrating how the device can revive batteries from 0% to 100% charge, applicable for aging, worn, or long-idle batteries.

Figure 7: Illustrates the various battery types supported by the EM355, including Standard Lead-Acid, AGM Flat Plate, AGM Spiral, EFB, and GEL batteries.

3.4 HD Color Display

The unit features an HD color display for real-time monitoring of voltage, current, and temperature. It provides an intuitive menu with quick-select modes for charging, programming, or maintenance. The auto-adjusting fan prevents overheating during prolonged use.

Figure 8: Close-up of the HD color display showing menu options for Programmable Power Supply, Fast Charging, and Settings.

4. Setup

4.1 Package Contents

• AUTOOL EM355 Main Unit
• 2-meter Pure Copper Cable with fully insulated battery clips
• Power Input Cable
• User Manual

Figure 9: Displays the main unit, its packaging, the 2-meter pure copper cables, and the user manual.

4.2 Initial Connection

1. Connect the power input cable to the EM355 unit and then to a suitable AC power outlet (110 Volts).
2. Ensure the main power switch on the unit is in the OFF position before connecting to the battery.
3. Connect the red (+) battery clamp to the positive terminal of the vehicle battery.
4. Connect the black (-) battery clamp to the negative terminal of the vehicle battery.
5. Turn the main power switch on the EM355 unit to the ON position. The HD color display will illuminate.

5. Operating Modes

The AUTOOL EM355 offers several operating modes accessible via the HD color display and control buttons:

5.1 Programming Mode (High-Current)

This mode provides a stable, adjustable voltage output for sensitive ECU programming and diagnostic tasks.

1. From the main menu, select "Programmable Power Supply".
2. Ensure battery clamps are correctly connected (red to +, black to -).
3. Choose between "Adjustable Mode" or "Fixed Mode" for voltage regulation.
4. Adjust the voltage within the 10.8V–16.0V range using the control buttons.
5. The display will show real-time voltage and current output.

5.2 Fast Charging Mode

Use this mode for efficient charging of various battery types.

1. From the main menu, select "Fast Charging".
2. Connect the battery clamps to the battery.
3. Select the appropriate charging option: "In-car Charging" (up to 40A) or "External Charging" (up to 20A).
4. The unit will automatically adjust the charging power based on the battery's state and type.
5. Charging will stop automatically once the battery is full to prevent overcharging.

5.3 Battery Repair Mode

This function helps to restore deeply discharged or sulfated batteries.

1. From the main menu, select "Battery Restoration".
2. For optimal results, the battery should be removed from the vehicle before restoration.
3. Connect the battery clamps to the battery.
4. The unit will apply a specialized charging cycle to desulfate and revive the battery.
5. Monitor the display for progress. The repair process may take an extended period (e.g., 24 hours for severely depleted batteries).

5.4 Vehicle Display Mode

This mode provides stable power for showroom vehicle demonstrations, ensuring uninterrupted power supply without draining the vehicle's battery.

1. From the main menu, select "Vehicle Display Mode".
2. Connect the power clamps to the vehicle's battery terminals.
3. The unit will provide a continuous, stable power supply to the vehicle.
4. Monitor the display for real-time voltage and current.

5.5 Forced Start Mode

This mode provides a high cranking current to start vehicles with low battery voltage.

1. From the main menu, select "Forced Start".
2. Connect the positive and negative terminals of the vehicle battery.
3. The unit will prompt you to start the vehicle.
4. Start the vehicle engine. The EM355 can provide up to 400A of cranking current.

6. Specifications

Figure 10: Detailed diagram showing the dimensions and key specifications of the AUTOOL EM355 unit.

7. Maintenance

• Keep the unit clean and free from dust and debris.
• Regularly check the battery clamps and cables for any signs of wear or damage. Replace if necessary.
• Store the unit in a dry, cool place when not in use.
• The auto-adjusting fan helps maintain optimal operating temperature; ensure its vents are not obstructed.

8. Troubleshooting

If you encounter issues with your AUTOOL EM355, refer to the following common troubleshooting steps:

• Unit not powering on: Check the power input cable connection and the main power switch. Ensure the AC outlet is functional.
• No output voltage/current: Verify that the battery clamps are securely connected to the correct terminals. Check for any short circuits or reverse polarity.
• Error message on display: Refer to the specific error code in the full user manual for detailed instructions. Common errors include overvoltage, undervoltage, or reverse polarity.
• Battery not charging: Ensure the correct battery type and charging mode are selected. Check if the battery is severely damaged and requires repair mode.
• Overheating: Ensure the unit's vents are clear and the auto-adjusting fan is operating. Reduce the load if operating in extreme conditions.

9. Warranty & Support

The AUTOOL EM355 comes with a Three Years Warranty for any quality problems. If the EM355 has any defect, AUTOOL will provide a new replacement or solutions to ensure customer satisfaction without delay. Lifetime technical support is also provided. For any needs, please contact AUTOOL customer service, and they will respond within 24 hours.