Autool DM303 | Multimeter
Warranty directly via AsTools
Warranty directly via AsTools
We handle warranty cases ourselves, quickly and without involving the manufacturer. Thanks to our own parts inventory and technical expertise, we can usually assist you immediately. Only in exceptional cases do we still send the product to the supplier.
2 years warranty on all products
2 years warranty on all products
All our products come with a 2-year factory warranty. This ensures you long-lasting quality and service.
Easy returns
Easy returns
You can easily request your return through your account. We will send you the return label by email. Return shipping costs are your responsibility.
Professional customer service
Professional customer service
Our experts are ready to help you quickly and professionally, both online and in our physical store. Questions? Feel free to contact us!
The Autool DM303 is a diagnostic automotive multimeter that combines the functions of a multimeter, oscilloscope, and signal generator in one compact unit. All measurements and waveforms are displayed on a 2.8-inch color screen. Operation is via a physical keypad with clearly labeled function buttons.
Beyond standard measurements like voltage, current, and resistance, this tool features specialized automotive diagnostic functions. The built-in oscilloscope offers a bandwidth of 500 kHz for analyzing sensor signals. The signal generator produces sine and square waves to simulate ECU signals. Dedicated test modes for fuel injectors, relays, ignition system, starter circuit, and K/CAN-bus data analysis enable targeted diagnostics.
KEY FEATURES
LIMITATIONS TO CONSIDER
Applications and Functionality
Designed for diverse measurements and testing of vehicle electronic systems. Primary functions:
- Multimeter capabilities: DC/AC voltage, current, and resistance measurements in electrical circuits.
- Oscilloscope: Visualizes signals from camshaft, crankshaft, and wheel speed sensors up to 500 kHz.
- Signal generator: Sine and square wave output for simulating sensor signals and testing ECU response.
- Cranking Test: Voltage drop and starter circuit performance during engine start.
- Injector Test: Simulates drive signals to verify injector operation.
- Relay Test: Relay functionality and switching performance.
- Ignition Pulse Test: Analysis of ignition system signals.
- K/CAN-line Data: Reading K-line and CAN-bus networks for communication diagnostics.
Measurement Ranges and Functions
- DC Voltage: 0 – 1000 V
- AC Voltage: 0 – 700 V
- Current: 0 – 20 A and 0 – 200 mA
- Resistance: 0 – 1 MΩ
- Frequency: 1 Hz – 1 MHz
- Injector Drive Signal: 500 – 6000 RPM
- Circuit Drive Current: 0 – 5 A
Package Contents
- 1x Autool DM303 multimeter
- 1x Multi-function detection line (C01)
- 1x Vehicle circuit detection line (C02)
- 1x Ignition signal detection line
- 1x Battery clamp cable
- 1x Jumper set (yellow)
- 1x Jumper set (green)
- 1x Set jumpers (black)
- 1x Test probe
- 1x Carrying case
- 1x User manual
Technical specifications
| Specification | Description |
|---|---|
| Brand | Autool |
| Model | DM303 |
| Product type | Automotive diagnostic multimeter |
| Display | 2.8-inch color screen |
| Oscilloscope bandwidth | 500 kHz |
| Input impedance | ≥2 MΩ (below 160V), 10 MΩ (above 160V) |
| DC voltage range | 0 – 1000 V |
| AC voltage range | 0 – 700 V |
| Current range | 0 – 20 A / 0 – 200 mA |
| Resistance range | 0 – 1 MΩ |
| Frequency range | 1 Hz – 1 MHz |
| Connections | Standard test leads, SD card slot |
| Operating temperature | 0 – 40 °C |
| Dimensions | 190 x 85 x 33 mm |
| Special Features | Signal generator, K/CAN-bus analysis, injector/relay/starter test |
