Description
TopDiag • Automotive circuit system tester P200Pro
The TopDiag P200Pro is a professional-grade circuit system tester designed for diagnosing 9 V–48 V vehicle electrical systems. Featuring a rugged ABS build and a large 2.4-inch color LCD, it serves mechanics and technicians needing precision tools. Core measurement capabilities include multimeter functions, waveform capture via oscilloscope, relay and fuel injector testing/cleaning, leakage detection, and activation of high-power components to 100 A. All wrapped in safety features like an internal circuit breaker and support for multiple languages.
Key benefits
- Supports multimeter, oscilloscope, relay testing, injector testing/cleaning, leakage current detection—all in one unit
- High component activation capacity: up to 25 A continuous and instantaneous pulses up to 100 A for verifying high-power components
- Wide operating voltage range: accurately handles circuits from 9 V up to 48 V
- Large, intuitive 2.4-inch TFT display with waveform visualization and clear mode navigation
- Includes smart safety features—adjustable circuit breaker protects equipment; built-in protection and usage limits
Supported protocols
- DC voltage measurement
- Frequency and duty-cycle signal analysis
- Pulse waveform output to fuel injectors
- Relay coil activation and contacts test
Supported functions
Depending on vehicle compatibility the following functions are supported:
- Multimeter mode: voltage, resistance, current, diode, continuity, frequency
- Oscilloscope mode: real-time waveform display for PWM, crank, fan, sensor signals
- Injector test and cleaning: analog nozzle signal output, nozzle waveform capture, cleaning cycles
- Leakage current test: live current plotting, recording and playback over time
- Component activation: Moment, Latch, Pulse modes for bulbs, motors, gauges up to 100 A
- Relay test: 4-terminal and 5-terminal relay diagnostics
- P-N mode: automatic polarity (positive/negative) identification
Included items
- 1 × P200Pro main unit (TopDiag P200Pro)
- 1 × AUX ground lead with battery clamps
- 1 × test probe with tip and insulation piercing functionality
- 1 × relay test box with connection cable
- 1 × set of probe adapters and connectors
- 1 × 25 A fuse (spare)
- 1 × user manual (printed and digital)
- 1 × carrying toolbox or case










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