How to Use the AUTOOL EM365: Programming Support, Charging, Display Power and Forced Start

The AUTOOL EM365 can support five distinct workshop tasks: hold vehicle voltage during an approved programming or diagnostic procedure, charge supported 12-volt lead-acid batteries, attempt off-vehicle restoration, maintain power for a stationary vehicle display, or provide short-duration forced-start support. It does not program an ECU, identify a battery chemistry, or decide the correct vehicle voltage for you. Safe use starts by separating those tasks and confirming the exact battery, vehicle and mains conditions before output begins.

Updated: August 27, 2026.

Choose the right EM365 mode first

Your job	Select on the EM365	Decision that must already be known	Critical limit
Hold vehicle voltage during diagnosis, coding or programming	Programmable Power Supply → Fixed Mode or Adjustable Mode	Exact vehicle or programming procedure; Fixed is 14 V, Adjustable is 10.8–16.0 V	EM365 supplies power only; it does not perform the programming
Charge a supported battery while installed	Fast Charging → Battery Charging → In-car Charging	Battery label identifies Standard lead-acid, AGM flat plate, AGM spiral or GEL	No EFB and no lithium charging in-car
Charge a supported disconnected or removed battery	Fast Charging → Battery Charging → External Charging	Battery label identifies Standard lead-acid, AGM flat plate, AGM spiral, EFB or GEL	EFB must be disconnected from the vehicle
Attempt recovery of a severely discharged supported battery	Fast Charging → Battery Restoration	Battery is removed, physically safe and correctly identified	Conditional result; never an in-vehicle repair
Maintain power for a stationary vehicle display	Fast Charging → Vehicle Display Mode	Vehicle procedure supplies the target within 10.8–16.0 V	Not a programming-mode substitute or unattended power source
Support one vehicle-start attempt	Forced Start	Exact vehicle procedure allows external support and required current is within the EM365 boundary	Maximum stated start support is 400 A/12 V; suitability must be confirmed before connection

The nameplate on the delivered unit is the final authority for mains input. Regional 110-volt and 220-volt versions exist. Do not infer universal input from an online specification or from another EM-series unit.

Before you connect anything

• Read the delivered manual and keep it in the work area. A current copy can also be located through the AUTOOL manual center.
• Identify the exact task before choosing a menu path. Programming Power, Fast Charging and Forced Start are not interchangeable.
• Read the battery label. Confirm that it is a supported rechargeable 12-volt lead-acid type and record its chemistry and installation state.
• Match the grounded outlet, input voltage and circuit protection to the EM365 nameplate. Never defeat protective earth.
• Work on a stable surface in a dry, clean, bright and well-ventilated area. Keep flames, sparks, conductive debris and corrosive material away.
• Wear eye protection and insulated gloves. Keep the unit away from the battery and keep the cooling fan unobstructed.
• Inspect the housing, mains lead, output cable, connector and clamps. Do not operate damaged equipment.
• Do not begin battery charging above 36°C ambient, and disconnect immediately if battery temperature exceeds 45°C.

Common setup and connection

Step 1: Identify the controls and stop devices

On the front, locate the output terminal, HD color display, Left, Right, OK, Stop and Return buttons, plus the red emergency-stop control. At the rear, locate the power-input interface, main power switch and cooling fan. Left and Right move through choices, OK enters or confirms, Return moves back, and Stop ends normal output.

Step 2: Place the EM365 safely

Set the unit on a dry, stable surface and never directly on top of a battery. Use the cable length to separate the machine from battery gases. Route both leads away from sharp edges, heat, fans, belts, tires and areas where a door or hood could pinch them.

Step 3: Verify the delivered mains version

Read the input rating on the unit in front of you. Confirm that the outlet voltage, protective earth, plug and circuit protection match it. Do this before inserting the mains lead. If any part of the supply is uncertain, pause the task.

Step 4: Identify the battery and vehicle boundary

Read the battery label and determine whether it is Standard lead-acid, AGM flat plate, AGM spiral, GEL or EFB. EM365 is not a lithium charger. Decide whether the battery will remain installed, be disconnected, or be removed. For programming support, begin with a fully charged vehicle battery. For restoration, remove and isolate the battery. For EFB charging, use External Charging with the battery disconnected from the vehicle.

Step 5: Connect the supplied output cable with power off

Keep the rear switch off and leave mains disconnected. Seat the supplied output connector fully in the front terminal. Arrange the red and black clamp leads so they cannot touch each other or bridge nearby metal.

Step 6: Attach the clamps with correct polarity

Use the exact vehicle or battery procedure to locate the positive terminal and the approved negative connection point. Attach red to positive and black to the approved negative point. Keep your face away from the battery and avoid making a spark near battery vents.

Step 7: Power on and clear the initial screen

Connect the verified mains lead and switch on at the rear. The fan may run during the initial self-test and then stop. Confirm that the display starts normally and shows no Battery Not Connected, Reverse Polarity, Temperature Abnormality, Emergency Stop or supply-protection message.

Use Programmable Power Supply mode

The AUTOOL EM365 can hold vehicle voltage while a separate scan tool, computer and approved procedure perform diagnosis, coding or programming. The vehicle procedure remains responsible for the target voltage and every ECU action.

Step 8: Choose Fixed or Adjustable mode

Highlight Programmable Power Supply and press OK. Use Fixed Mode only when the procedure specifies the EM365 fixed 14-volt output. Use Adjustable Mode when the written procedure calls for another target within 10.8–16.0 volts; set it with Left and Right, then confirm with OK.

Step 9: Recheck the battery and vehicle state

Read the on-screen clamp and battery-capacity prompt. Confirm that the vehicle battery is fully charged, polarity remains correct, all terminals are stable and every vehicle-side preparation is complete. This includes any ignition, door, lighting, network, cooling or accessory condition specified by the approved procedure.

Step 10: Start support and monitor the complete session

Press OK to begin output, then watch EM365 voltage, current, internal temperature indication, cables and the vehicle procedure throughout. The manual states a maximum programming output of 150 A for approximately three minutes. If internal temperature reaches 70°C, the machine can limit maximum output to 50 A until it cools to 50°C. Plan from the vehicle’s real demand rather than treating 150 A as unlimited continuous output.

Charge a supported lead-acid battery

Step 11: Choose In-car or External Charging

From Fast Charging, choose Battery Charging, then select the actual location. In-car Charging is limited to an installed Standard lead-acid, AGM flat plate, AGM spiral or GEL battery when the vehicle procedure permits charging in place. External Charging is for a disconnected or removed battery and adds EFB.

The specification table lists 20 A/12 V lead-acid charging, while the operating pages label In-car Charging as a maximum of 40 A and External Charging as a maximum of 20 A. Treat 20 A/12 V as the published specification and 40 A only as the manual’s mode description, not a continuous-output promise. Choose by battery location and chemistry, never by the larger number.

Step 12: Select and confirm the exact battery type

Use Left and Right to choose the chemistry printed on the label, press OK, and compare the confirmation screen with the battery again. Confirm only when both match. The available external choices are Standard lead-acid, AGM flat plate, AGM spiral, GEL and EFB; in-car choices exclude EFB.

Step 13: Monitor charging to a named end state

Start the cycle and remain present. Watch displayed voltage, current and progress as well as battery temperature, venting and physical condition. Normal automatic completion is shown by Charging Completed. If you intentionally end earlier, press Stop and wait for output to cease before touching a clamp.

Use Vehicle Display Mode

Step 14: Set display-support voltage from the vehicle procedure

From Fast Charging, choose Vehicle Display Mode. Set the target within 10.8–16.0 V only after checking the vehicle procedure. The manual says the EM365 applies a small float current during standby and may provide up to 40 A as the vehicle discharges. It also says that if the chosen value is below battery voltage, the machine automatically changes the charging voltage to battery voltage plus 2 V.

Step 15: Monitor the stationary vehicle load

Start display support and remain with the vehicle. Keep unnecessary loads off unless they are part of the planned display, watch voltage and current, and periodically inspect cable position and battery temperature. End the session before changing any setting or connection.

Use Battery Restoration only off the vehicle

Step 16: Remove, identify and inspect the battery

Use the vehicle procedure to disconnect and remove the battery. Put it in an open, shaded and ventilated location, confirm its supported lead-acid chemistry and inspect it again. Restoration is intended for some severely discharged batteries; its result depends on battery condition, and the process can cause fluid loss or drying.

Step 17: Run restoration and interpret the result correctly

Reconnect the isolated battery using the common steps, choose Fast Charging → Battery Restoration, confirm the battery-removal prompt and remain present. The manual describes three automatic results: Restoration Completed after 14.6 V is reached and float charging continues for two hours; Restoration Failed if a severely discharged battery does not rise to 9 V within one hour; or No Battery Restoration Required if initial voltage is above 12.6 V.

Use Forced Start only after a suitability check

Step 18: Confirm that forced-start support is appropriate

Consult the vehicle procedure before connecting. Confirm a 12-volt system, approved external-support points and a starting-current requirement within the EM365 limit. The product information describes use for suitable vehicles below 3.0 L, but engine displacement alone does not prove electrical compatibility. The manual states a 400 A/12 V maximum; treat that as a brief ceiling, not a guaranteed result for every vehicle or battery condition.

Step 19: Select Forced Start and read the prompt

With the common connection checks complete, select Forced Start. Reconfirm red-to-positive and black-to-approved-negative polarity, then choose Start. The screen prompts you to start the vehicle. Keep the leads clear of moving parts and place yourself where the screen, clamps and vehicle can be observed.

Step 20: Make one controlled start attempt and end support

Crank only as allowed by the vehicle procedure. When current exceeds 50 A, the EM365 changes the display to starting voltage and current. The manual says output protection interrupts the task if current exceeds 150 A for one second or 400 A for 500 milliseconds; OK can resume only after the cause and vehicle suitability have been reassessed. Once the engine starts, end support and follow the vehicle procedure for safe disconnection.

Alerts, shutdown and storage

Step 21: Treat every alert as a stop-and-check gate

For Battery Not Connected, stop and inspect clean terminal contact before one careful reconnection. For Reverse Polarity, end output and remove the clamps before correcting polarity. For Temperature Abnormality, follow the manual’s cooling instruction and keep the fan running; do not continue if the warning appears immediately on a cold unit. Release Emergency Stop clockwise only after the reason it was pressed has been resolved.

AC overvoltage, undervoltage, input overcurrent, output overvoltage, output overcurrent, leakage and short-circuit warnings require the task to stop. Correct only an obvious external supply, battery, clamp or cable condition. Never open the case or bypass a protection state.

Step 22: End the active function normally

Finish the separate vehicle procedure first when applicable, press Stop on the EM365, and wait until the active-output screen ends. During charging, use the same Stop-first rule if the job is ending before automatic completion. Do not change mode, voltage, chemistry or connection while output is active.

Step 23: Disconnect, inspect and store

After output stops, remove the clamps in the order required by the vehicle or battery procedure, switch off at the rear and unplug mains. Inspect the housing, output connector, clamps and both leads. Coil without sharp bends and store the EM365 dry, clean and ventilated, away from children, corrosive liquids, heat and humidity.

Six mistakes that cause most EM365 problems

1. Treating the EM365 as the ECU programmer instead of a support supply.
2. Guessing programming or display voltage instead of using exact vehicle information.
3. Selecting chemistry by appearance, especially EFB in-car or any lithium battery.
4. Running restoration while the battery remains connected to the vehicle.
5. Selecting Forced Start from engine size alone or repeatedly resetting protection after a no-start.
6. Removing clamps or pulling mains before Stop has ended normal output.

EM365 questions answered

Can the EM365 charge a lithium battery?

No. Its charging menus and current manual cover supported 12-volt lead-acid types. Use equipment and a procedure explicitly approved for the exact lithium chemistry and battery-management system.

Is 150 A available continuously in Programming Power mode?

No continuous 150 A promise should be assumed. The manual describes approximately three minutes at maximum output, with temperature control reducing the maximum to 50 A at 70°C internal temperature until the unit cools to 50°C.

Why does the manual show both 20 A and 40 A for charging?

The specification table lists 20 A/12 V. The operating section describes In-car Charging as a maximum of 40 A and External Charging as a maximum of 20 A. Use location and battery chemistry to choose the mode, and do not turn the larger on-screen figure into a continuous rating claim.

Does the 400 A label mean Forced Start works on every car below 3.0 L?

No. The 400 A/12 V figure is a maximum boundary, and displacement is only a broad product-page qualifier. Battery condition, system voltage, starter demand, terminals and vehicle instructions still decide whether external start support is appropriate.

Does Restoration Completed mean the battery is healthy?

No. It identifies the end of the EM365 cycle. It is not a capacity, conductance, load or vehicle-serviceability test. Evaluate the battery separately before reinstalling it.

What should I do if an alert returns after a connection check?

Stop using the unit. A persistent warning is not a request to open the case or keep resetting protection. Isolate the EM365 and obtain qualified support.

Final operating checklist

• Exact task, vehicle procedure and supported battery chemistry identified.
• Delivered nameplate matched to a grounded outlet and correct circuit protection.
• EM365 stable, dry, ventilated and separated from the battery.
• Cables, clamps, polarity and approved connection points checked.
• Correct mode, battery location, chemistry and required voltage confirmed.
• Programming support, display support and Forced Start kept as separate workflows.
• Screen, current, voltage, temperature, leads and work area monitored throughout.
• Any warning treated as a stop-and-check condition.
• Stop used before clamps, mode or mains connection are changed.
• Battery condition or no-start cause verified separately before return to service.

The EM365 is easiest to operate when its modes remain separate. Let exact vehicle information control programming and display voltage, let the battery label and installation state control charging, reserve restoration for an isolated battery, and treat Forced Start as a carefully checked transient task. That decision-first method gives each job a clear start condition, completion check and stop point.