Description
TopDiag • Automotive circuit system tester P100Pro
The TopDiag P100 Pro is a professional multi-function circuit diagnostic analyzer designed for 9-30 V vehicle electrical systems in cars, motorcycles, trucks, SUVs, trailers, and more. Featuring a 2.4-inch true-color TFT display and rugged enclosure, it integrates multimeter, oscilloscope, component activation, polarity check, continuity testing, and a 0-5 V adjustable power supply—all in one compact probe-style device. Ideal for auto repair shops, 4S service centers, and technicians who require fast, accurate diagnostics.
Key benefits
- Wide voltage coverage: 9-30 V operating range, measuring range from 0.1-100 V DC; resistance range 1 Ω-200 kΩ; active current up to 18 A
- Multiple diagnostic modes: multimeter (voltage, resistance, diode, continuity), oscilloscope (waveform, frequency, duty cycle), and automatic signal detection
- Component activation & 0-5 V adjustable power supply: test bulbs, motors, relays; simulate low-voltage sensor outputs safely (under 100 mA)
- Built-in safety features: automatic polarity detection, overload protection, circuit breaker, set-point voltage alarm
- Enhanced usability: two front LED lights for working in dark spaces, long cables, rugged design, multilingual interface
Supported functions
Depending on vehicle compatibility the following functions are supported:
- Multimeter mode: voltage, resistance, diode, continuity tests
- Oscilloscope mode: waveform display, frequency, time, duty cycle readings
- Component activation: direct power to components such as lights, motors, relays in momentary, latched, or pulsed mode
- Power supply mode: adjustable 0-5 V output up to ~100 mA to simulate sensors or test circuits
- Alarm function: detects when measured voltage diverges from a preset threshold
- Automatic signal identification and polarity indicator
Included items
- 1 × P100 Pro circuit tester device
- 1 × alligator-clip battery cable (positive and negative clamps)
- 1 × probe adapter
- 1 × relay test line
- 1 × power cable
- 1 × user manual
- 1 × carrying bag or packing pouch
Supported languages
English, Spanish, German, French, Italian, Portuguese, Polish, Russian, Vietnamese, Thai, Indonesian, Filipino, Malay, Arabic, Korean, Japanese, Traditional Chinese










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