Autool DM303 | Multimeter

The Autool DM303 is a diagnostic multimeter designed for measurements on electronic systems in vehicles. The device combines the functions of a multimeter, an oscilloscope, and a signal generator in one housing. All measured values and waveforms are displayed on a 2.8 inch color screen. Operation is via a physical keyboard with clear function keys.

In addition to standard measurements such as voltage, current, and resistance, this instrument features specialized automotive test functions. The built-in oscilloscope has a bandwidth of 500 kHz for analyzing sensor signals. The signal generator can produce sine and square waves to simulate ECU signals. Specific test modes for injectors, relays, the ignition system, the starting circuit, and K/CAN bus data analysis enable targeted diagnosis.

Application and functionality:

This instrument is developed for performing various measurements and tests on electronic systems in vehicles. The functions are aimed at diagnosing and analyzing signals and components.

• Multimeter functions: For measuring DC/AC voltage, current, and resistance in electrical circuits.
• Oscilloscope: Visualizes electronic signals, such as those from camshaft, crankshaft, and wheel speed sensors, with a bandwidth of 500 kHz.
• Signal generator: Generates analog signals, including sine and square waves, for simulating sensor signals and testing ECU responses.
• Vehicle circuit test: Comprehensive analysis of the electrical circuits within the vehicle.
• Start test (cranking test): Measures and analyzes voltage drop and performance of the starting circuit during engine start.
• Injector test: Checks the operation of fuel injectors by simulating drive signals.
• Relay test: Tests the functionality and switching performance of relays in the vehicle.
• Ignition pulse test: Measures and analyzes signals from the ignition system.
• K/CAN line data: Reads and displays data from K-line and CAN-bus networks for communication diagnostics.

Measurement ranges and functions:

The DM303 features the following measurement ranges for a wide range of applications:

• DC voltage: 0 - 1000V
• AC voltage: 0 - 700V
• Current: 0 - 20A and 0 - 200mA
• Resistance: 0 - 1MΩ
• Frequency: 1Hz - 1MHz
• Injector drive signal: 500 - 6000 RPM
• Circuit drive current: 0 - 5A

Package Contents:

• 1x Autool DM303 multimeter
• 1x Multifunctional detection line (C01)
• 1x Vehicle circuit detection line (C02)
• 1x Ignition signal detection line
• 1x Battery clamp cable
• 1x Set jumpers (yellow)
• 1x Set jumpers (green)
• 1x Set jumpers (black)
• 1x Test probe
• 1x Package Contents
• 1x Manual

Technical specifications: