QDB300 Automotive Ignition Coil Tester with Injector and Stepper Motor

QDB300 is a compact, multi‑function diagnostic tool designed for modern automotive troubleshooting. This handheld unit combines an oscilloscope‑style signal tester, PWM drive output for solenoids and injectors, a stepper motor tester for idle and gauge motors, and reliable signal simulation for sensors—all in one portable device. It helps technicians quickly pinpoint ignition coil faults, injector issues, and actuator problems, reducing diagnostic time and vehicle downtime. The bright TFT color screen presents waveforms and readings clearly, so you can interpret results at a glance, even in busy workshops or DIY garages. Compatible with 12V and 24V vehicle systems, it operates from a DC supply of 9–26V, making it a versatile companion for automotive work.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

Main Description

QDB300 brings together several core diagnostic capabilities in a single handheld instrument. Its oscilloscope‑style test signal display helps you visualize ignition coil behavior and injector response, while the PWM driver outputs controlled signals to simulate real‑world operating conditions. The built‑in multimeter covers essential electrical checks—voltage, resistance, current, capacitance, and diodes—so you can verify circuitry without grabbing multiple tools. The stepper motor tester supports idle and instrument motor testing, enabling quick identification of mechanical or electronic faults in auxiliary systems.

Benefits & Tips

• Efficient ignition and injector testing: Use the built‑in signal display to compare coil primary/secondary behavior and injector pulse performance, helping you confirm proper timing and energization.
• Streamlined diagnostics: Diagnose multiple components without switching between devices—test coils, injectors, PWM‑driven devices, and stepper motors from one interface.
• Practical use tips: Start with a known good supply (DC 9–26V) and verify supply voltage with the multimeter before applying PWM signals. Use the 1–100 kHz frequency range and 0–100% duty cycle to model real operating conditions, and switch between 2‑wire and 3‑wire modes as needed for different coil or injector types. Keep operating temperature within 0–55°C for optimal performance.

Product Specifications

• Brand: YIQIXIN
• Hardware Version: QDB-5A
• Model Origin: Mainland China
• Item Weight: 0.4 kg
• Material: Iron + Plastic
• Certification: CE (External Testing Certification)
• Power Requirements: DC 9–26V (suitable for 12V/24V vehicle systems)
• Display: TFT color screen
• Key Functions: Automobile ignition coil test, injector solenoid/valve test, stepper motor tester, injector tester, injector valve tester, ignition coil simulator, PWM driver and PWM signaling
• PWM Output: Frequency 1–100 kHz, Duty cycle 0–100%, VPP 1.25–14.5V; supports 2‑wire and 3‑wire modes
• Signal and Sensor Testing: Signal generation and testing for idle motors, electronic fans, flow sensors, and similar actuators; supports sensor signal simulation (e.g., air conditioner pressure, rail pressure)
• Multimeter Capabilities: Voltage DC 0–30V, Resistance 0–1 MΩ, Current 0–1.8 A, Capacitance 10 nF–1000 μF, Diodes
• Operating Temperature: 0–55°C
• Power Output: Adjustable up to 2.5 A
• Power Interface: DC input for 12V/24V vehicle systems
• Language Support: English (additional languages may be available depending on region)
• Application Range: Ideal for automotive maintenance professionals and DIY mechanics

Package includes:

• Not specified in the available product data.

Warnings / Reminders

Use strictly within the specified voltage (9–26V) and operating temperature (0–55°C). Ensure proper connections and follow all safety procedures when testing live circuits. Do not expose the unit to water or moisture. For optimal results, perform tests on a stable test bench and disconnect from the vehicle when making physical connections. Refer to the user manual for connection diagrams and safety guidelines.

Language Support

Language support: English (additional languages may be available depending on region).

Trust statement: At intercyprus.com since 2002 — trusted for quality and reliability.