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AUTOOL DM301 Auto Digital Multimeter Car Circuit Tester
US$109.00
Key Features
- Oscilloscope Mode
- 1000V Range
- Carry Case
- Oscilloscope Mode: Combines oscilloscope and multimeter functions in one handheld tool.
- 1000V Range: Handles high-voltage circuit checks when the source is valid.
- Carry Case: The toolbox keeps the main unit and accessories organized for transport.
- 3-Year Warranty Main unit 3 years · Accessories 1 year
- 90-Day Returns Eligible returns within 90 days
- Official Store Genuine products · Direct support
AUTOOL DM301
Product Overview
The AUTOOL DM301 automotive digital multimeter is a handheld diagnostic multimeter that combines digital multimeter functions with a single-channel oscilloscope. It is designed for vehicle circuit testing, voltage, current, resistance, frequency, diode, ignition pulse signal, and basic waveform observation in automotive maintenance.
Digital Multimeter 500kHz Oscilloscope Ignition Pulse Signal 2.8-Inch Color Screen
DC 0-1000VVoltage Range
0-20ACurrent Range
500kHzScope Bandwidth
3 YearsWarranty Support
Click to enlargeBefore You Order And Use
Before You Order And Use
DM301 is shipped without batteries. Confirm the battery type before use, and do not charge dry batteries through the device.
Batteries Are Not Included
DM301 / DM303 are shipped without batteries. Please purchase compatible batteries separately before use.
Dry Battery Option
DM301 can use 4 × 1.5V dry batteries according to the battery compartment requirement.
Optional Lithium Battery
A compatible lithium battery can also be installed by the user. Use the battery style shown as a reference before purchasing.
Do Not Charge Dry Batteries
Only a compatible rechargeable lithium battery can be charged through the device. Do not charge dry batteries.
Before First Use
- Install batteries before powering on the DM301.
- Do not mix dry batteries with a lithium battery.
- Confirm battery polarity and battery compartment fit before installation.
- Contact support if you are not sure which lithium battery is compatible.
Click to enlargeProduct Comparison
Product Comparison
DM301 is the compact choice for core multimeter and oscilloscope work. DM303 is the higher-function model for users who need more automotive-specific diagnostic modes and more test lead options.
Choose DM301 IfYou mainly need voltage, current, resistance, frequency, diode, oscilloscope, and ignition pulse signal testing in a portable automotive multimeter.
Choose DM303 IfYou need expanded automotive diagnostic modes such as fuel injector testing, relay testing, automotive circuit testing, starting testing, signal simulation, CAN line data reading, and K/LIN line data reading.
Function DifferenceDM301 focuses on 6 core measurement and diagnostic functions. DM303 adds more advanced automotive-specific test modes for electronic control system diagnosis and complex fault detection.
Power DifferenceDM301 supports dry batteries, Type-C, and an optional lithium battery. DM303 further enhances the power configuration and supports a 12V rechargeable battery setup.
Accessory DifferenceDM301 includes 2 types of test leads. DM303 includes 6 types of test leads, giving more connection options for different diagnostic scenarios.
Click to enlargeKey Features
Key Features
DM301 combines a clear display, portable toolbox, oscilloscope function, auto range measurement, multilingual interface, SD card software upgrading, and 3-year warranty support.
2.8-Inch Color Screen
The adjustable color screen provides clear and intuitive data display for different workshop and vehicle-side working environments.
Portable Toolbox
The plastic toolbox stores the main unit and accessories, making the instrument easier to carry and helping protect it from drops and impacts.
Single-Channel Oscilloscope
The oscilloscope provides 500kHz bandwidth, 1mS update rate, and practical sweep time and vertical scale ranges for automotive waveform observation.
Auto Range And True RMS
Select the measurement mode and connect the test leads. DM301 automatically selects a suitable range and supports True RMS readings.
Multilingual Interface
The interface supports multiple languages, including English, French, Portuguese, Polish, Spanish, Japanese, Russian, Italian, German, Dutch, Korean, Chinese, and Traditional Chinese.
SD Card Software Upgrade
Application software can be updated by copying the update file to an SD card and upgrading through the instrument.
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Click to enlargeFunctions And Test Coverage
Functions And Test Coverage
DM301 covers common automotive electrical measurements and waveform checks, making it useful for circuit diagnosis, sensor signal observation, and ignition pulse signal testing.
DC / AC Voltage
Detects DC and AC voltage signals in automotive circuits, with measurement range up to DC 1000V and AC 700V.
DC / AC Current
Measures 0-200mA current and supports high-current mode up to 20A for suitable test scenarios.
Resistance And Diode
Supports resistance and diode testing. When the detected resistance is too low, the multimeter gives an audible alert.
Frequency Measurement
Measures frequency signals from 1Hz to 1MHz for common automotive electrical signal checks.
Oscilloscope Function
The handheld oscilloscope has 500kHz bandwidth and supports one-button automatic waveform display.
Ignition Signal Diagnosis
Select the engine cylinder type and ignition mode to help calculate speed for different engine cylinders.
Applications
Applications
DM301 is suitable for common vehicle circuit diagnostic scenarios where voltage, current, resistance, frequency, diode, ignition signal, and waveform observations are needed.
Fuel Engine Signal Checks
Use the oscilloscope and measurement modes to observe ignition signals, camshaft signals, crankshaft signals, wheel speed sensor signals, oxygen sensor signals, and other fuel-engine circuit signals.
Electric Vehicle Signal Checks
Supports observation of slowly changing signals such as motor drive signals and motor power voltage on electric vehicles under proper diagnostic conditions.
Workshop Circuit Testing
Use voltage, current, resistance, frequency, diode, and continuity-related checks for vehicle electrical circuit troubleshooting.
Portable Field Diagnosis
The handheld body, flashlight function, back bracket, and toolbox make it convenient for trucks, sedans, buses, electric vehicles, and other vehicle types.
Specifications
AUTOOL DM301 Product Specifications
The DM301 combines automotive multimeter measurements with oscilloscope capability, a color display, battery-powered operation, and SD card software update support.
| Measurement Specifications | |
| Product | AUTOOL DM301 Auto Diagnostic Multimeter |
| Display | 2.8-inch color screen |
| Voltage Measurement Range | DC 0-1000V, AC 0-700V |
| Current Measurement Range | 0-200mA; high-current mode up to 20A |
| Resistance Measurement Range | 0-1MΩ |
| Frequency Measurement Range | 1Hz-1MHz |
| Oscilloscope | Single channel, 500kHz bandwidth |
| Scope Update Rate | 1mS |
| Working Temperature | 0°C-40°C / 32°F-104°F |
| Dimensions | 85 × 190 × 33mm |
| Power And Interface | |
| Power Supply | Dry battery / Type-C / optional lithium battery |
| Battery Notice | Batteries are not included. Dry batteries cannot be charged through the device. |
| Data Interface | SD card slot / data interface |
| Software Upgrade | Application software update by SD card |
| Language | Multilingual interface |
| Warranty | 3-year warranty support for eligible non-human damage cases |
Click to enlargeMeasurement Specifications
Display2.8-inch color screen
VoltageDC 0-1000V, AC 0-700V
Current0-200mA; up to 20A
Resistance0-1MΩ
Frequency1Hz-1MHz
OscilloscopeSingle channel, 500kHz
Dimensions85 × 190 × 33mm
Power And Support
Power SupplyDry battery / Type-C / optional lithium battery
Battery NoticeBatteries not included
UpgradeSD card software update
Warranty3-year warranty support
Click to enlargeProduct Details
Product Details
The DM301 detail diagram identifies the button area, connector area, and bracket reference so users can understand the external control and connection layout before use.
Button Reference
The image marks the device button area for front-side operation reference.
Connector Reference
The connector position is shown to help users identify where test leads or accessories connect.
Bracket Reference
The bracket detail helps users understand how the unit can be positioned during inspection or testing.
Click to enlargeWhat Is In The Box
What Is In The Box
The packing list image shows the DM301 main unit, toolbox, user manual, retail box, test leads, and connector cable. Batteries are not included and must be purchased separately.
Main UnitAUTOOL DM301 auto diagnostic multimeter
StoragePortable toolbox shown in the package image
Test Leads2 types of test leads shown in the package image
Connector CableDB-style connector cable shown in the package image
DocumentationUser manual and retail box
BatteryBatteries are not included
Manual And Downloads
Manual And Downloads
Download the DM301 manual for battery installation, measurement modes, oscilloscope operation, settings, software update, accessories, and safety instructions.
Click to enlargeAUTOOL DM301 Manual PDF
Open the official PDF manual for setup, measurement, oscilloscope, and update guidance.
Download ManualNeed Setup Confirmation?
Contact AUTOOL Store before ordering if you need to confirm battery type, lithium battery compatibility, DM301 / DM303 model choice, accessories, Type-C charging, or software upgrade steps.
Related Products
Related Products
Compare DM301 and DM303 before choosing the right diagnostic multimeter for your measurement modes, test leads, power setup, and automotive diagnostic needs.
- Select options This product has multiple variants. The options may be chosen on the product page
AUTOOL DM303 Digital Multimeter Car Circuit Tester
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AUTOOL DM301 Auto Digital Multimeter Car Circuit Tester
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AUTOOL DM103 Digital LCR Tweezer for Resistance Capacitance and Inductance
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Questions And Answers
These answers cover DM301 batteries, Type-C charging, DM301 vs DM303 model selection, measurement functions, package contents, software upgrades, and manual download.
No. DM301 / DM303 are shipped without batteries. You need to purchase compatible batteries separately before use.
DM301 can use 4 × 1.5V dry batteries according to the battery compartment requirement. A compatible lithium battery can also be installed by the user. Check the lithium battery reference image and confirm compatibility before purchasing.
No. Do not charge dry batteries. Only a compatible rechargeable lithium battery can be charged through the device.
DM301 focuses on core automotive multimeter and oscilloscope functions, including voltage, current, resistance, frequency, oscilloscope, diode, and ignition pulse signal testing. DM303 adds more automotive-specific diagnostic modes, including fuel injector testing, relay testing, automotive circuit testing, starting testing, signal simulation testing, CAN line data reading, and K/LIN line data reading. DM303 also includes more test leads.
DM301 supports DC / AC voltage, DC / AC current, resistance, diode, frequency, oscilloscope, and ignition pulse signal testing. Its oscilloscope is single channel with 500kHz bandwidth.
Refer to the Packing List image for the final package contents. The image shows the DM301 main unit, portable toolbox, user manual, retail box, 2 types of test leads, and connector cable. Batteries are not included.
Yes. The DM301 application software can be updated by copying the update file to an SD card and using the instrument’s SD card slot / data interface according to the manual instructions.
Use the Download section in this Description page to open the AUTOOL DM301 Manual PDF. The manual covers setup, operation, measurement modes, oscilloscope use, settings, software update, and safety guidance.
Warranty And Contact
Warranty And Contact
For DM301 setup, battery type confirmation, Type-C charging questions, lithium battery compatibility, DM301 / DM303 model selection, accessories, software upgrade, or warranty support, contact AUTOOL Store directly.
Pre-Sales And Product Support
Use support if you need help confirming DM301 measurement functions, power setup, battery compatibility, packing list, manual download, software upgrade, oscilloscope use, ignition pulse signal testing, or comparison with DM303.
- 3-year warranty support for eligible non-human damage cases
- DM301 / DM303 model selection
- Battery type and Type-C charging confirmation
- Lithium battery compatibility support
- Packing List and accessory confirmation
- Software upgrade and manual download guidance
- Measurement setup and oscilloscope use support
Customer Reviews
Leave A Review
Roza (verified owner) –
I think I got a really useful tool.
I think I got a really useful tool.
mamiko (verified owner) –
Everything's working fine.
Everything’s working fine.
Brian (verified owner) –
Good tools and good quality
Good tools and good quality