AUTOOL DM301 Auto Digital Multimeter Car Circuit Tester

(11 customer reviews)

US$109.00

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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
AUTOOL DM301 auto diagnostic multimeter for voltage current resistance frequency oscilloscope and ignition pulse signal test Click to enlarge
Before 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.
Compatible lithium battery style reference for AUTOOL DM301 and DM303 Click to enlarge
Product 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.
AUTOOL DM301 and DM303 auto diagnostic multimeter comparison chart Click to enlarge
Key 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.

Functions 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.

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Measurement Specifications
ProductAUTOOL DM301 Auto Diagnostic Multimeter
Display2.8-inch color screen
Voltage Measurement RangeDC 0-1000V, AC 0-700V
Current Measurement Range0-200mA; high-current mode up to 20A
Resistance Measurement Range0-1MΩ
Frequency Measurement Range1Hz-1MHz
OscilloscopeSingle channel, 500kHz bandwidth
Scope Update Rate1mS
Working Temperature0°C-40°C / 32°F-104°F
Dimensions85 × 190 × 33mm
Power And Interface
Power SupplyDry battery / Type-C / optional lithium battery
Battery NoticeBatteries are not included. Dry batteries cannot be charged through the device.
Data InterfaceSD card slot / data interface
Software UpgradeApplication software update by SD card
LanguageMultilingual interface
Warranty3-year warranty support for eligible non-human damage cases
AUTOOL DM301 product specifications with voltage current resistance frequency temperature and dimensions Click to enlarge
Measurement 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
AUTOOL DM301 button connector and bracket reference diagram Click to enlarge
Product 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.

AUTOOL DM301 packing list with main unit toolbox user manual retail box test leads and connector cable Click to enlarge
What 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.

AUTOOL DM301 user manual preview Click to enlarge

AUTOOL DM301 Manual PDF

Open the official PDF manual for setup, measurement, oscilloscope, and update guidance.

Download Manual

Need 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.

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.

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

  1. 5
    (11 customer reviews)
    100% of customers recommend this product.
    5 Stars100%4 Stars0%3 Stars0%2 Stars0%1 Star0%
  2. Roza

    I think I got a really useful tool.

    0 of 0 found this review helpful
  3. mamiko

    Everything’s working fine.

    0 of 0 found this review helpful
  4. Brian

    Good tools and good quality

    0 of 0 found this review helpful
  5. Prorepairs

    Fast delivery, arrived in 3 days. 5 stars. Versatile and effective.

    0 of 0 found this review helpful
  6. Sebastiane Craigie

    I bought this meter for the scope function, and it is great . I love the fact that it has all I need in the box .. my go to box for quick electrical diagnostics before pulling out the pico or ats ,
    It has a similiar power probe function . It also has amp meter and ohm meter , but the great part for me is the scope function . I can check signals to see if they are there before digging deep . Also it adjust the time base and the voltage scale . Great meter well worth it and the price is the good part too thanks autool

    0 of 0 found this review helpful
  7. Byron Anne

    Can’t remember when I got this meter, but I use it all the time on all sorts of jobs; i.e. testing batteries, checking voltage, testing resistance, etc. There’s a lot of bells and whistles in this package and the price can’t be beat. Not the best, but even the test leads are well made.

    0 of 0 found this review helpful
  8. Caesar Temple

    These multimeters are the best you can buy. Sturdy, high quality and no gimmicks. This meter will last forever as long as you don¡¯t spill anything on them or let the batteries corrode.

    0 of 0 found this review helpful
  9. lily

    It’s easy to use. I went to YouTube and watched some videos.

    0 of 0 found this review helpful
  10. Lionel Crofts

    The test function is very comprehensive, it can be used as a multimeter, but also can measure the ignition pulse, diode signal, and also can be used as an oscilloscope, it is really so convenient!

    0 of 0 found this review helpful
  11. Choo huatlim

    Easy install 2A battery then can use it. Must at least charge 2 hours for first time

    0 of 0 found this review helpful
  12. Zebulon Yeates

    I purchased AUTOOL automotive diagnostic multimeter finally received the goods, this brand of diagnostic instrument products a lot of very good, I will also buy other instruments!

    0 of 0 found this review helpful
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AUTOOL DM301 Auto Digital Multimeter Car Circuit Tester
AUTOOL DM301 Auto Digital Multimeter Car Circuit Tester

US$109.00

Add to cart This product has multiple variants. The options may be chosen on the product page