AUTOOL DM303 Professional Auto Diagnostic Multimeter with Oscilloscope & 12 Test Functions

The AUTOOL DM303 is a professional automotive diagnostic multimeter that combines 12 powerful functions in one compact tool. With a 2.8-inch color display, built-in oscilloscope, K/CAN line data test, injector and relay test, cranking test, ignition signal test and more, it is designed for workshops, auto electricians, and advanced DIY users. Packed in a durable carry case with all necessary leads and adapters, it delivers reliable, versatile vehicle diagnostics.

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Key Features

• 2.8-inch color display – bright and clear for all environments
• 12 test modes including multimeter, oscilloscope, injector, relay and ignition signal
• Supports K/CAN line data detection
• Cranking voltage test for starter and battery health
• Analog and frequency signal testing up to 1MHz
• Injector drive and automotive circuit drive testing
• Compact handheld design with built-in stand
• Comes in a durable carry case with multiple probe and adapter sets

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Functions

• Voltage measurement (DC 0-1000V, AC 0-700V)
• Current measurement (0-20A, 0-200mA)
• Resistance measurement (0-1MΩ)
• Frequency measurement (1Hz-1MHz)
• Oscilloscope with waveform display
• Automotive circuit test (0-5A)
• Cranking test for starting system
• Injector test (500-6000 rpm signal output)
• Relay test with contact resistance
• Analog signal and waveform test
• Ignition signal pulse test
• K/CAN line data detection

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Technical Specifications

• Voltage Measurement Range: DC 0-1000V, AC 0-700V
• Current Measurement Range: 0-20A, 0-200mA
• Resistance Range: 0-1MΩ
• Frequency Range: 1Hz-1MHz
• Automotive Circuit Drive Current: 0-5A
• Injector Drive Signal Output: 500-6000 rpm
• Working Temperature: 0°C to 40°C
• Display: 2.8-inch color LCD
• Dimensions: 190 × 85 × 33 mm

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What’s in the Box

• 1 × AUTOOL DM303 Diagnostic Multimeter
• 1 × Multi-functional detection line (with CAN/K line, sine, square, 5V signal leads)
• 1 × Automotive circuit detection line
• 1 × Ignition signal detection line
• 1 × Battery clip line
• 3 × Jumper cables (Yellow, Green, Black)
• 1 × Probe
• 1 × User manual
• 1 × Protective carry case

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User Manual

Download User Manual