Scan Tool (Diagnostic Tool)
A scan tool connects to the car's diagnostic port to read fault codes, live data and run tests.
What is Scan Tool (Diagnostic Tool)?
Generic OBD-II readers read emission-related codes and basic data. Professional and manufacturer tools access all control units, coding and service functions. Bluetooth adapters work with phone apps. Freeze frame data, readiness monitors and pending codes are all visible with good tools. Some tools also perform service resets and adaptations. Choose a tool that supports your car brand's protocols.
How it works
It communicates with control units over the vehicle networks using standard protocols.
Why it matters for your car
Codes are a starting point; diagnosis still needs testing. Some cars restrict access through security gateways.
Other terms
- Balance Shaft
- Borescope (Inspection Camera)
- Brake Assist
- Car Alarm
- Crankshaft Position Sensor
- Emergency Stop
- LIN Bus
- Load Cover (Parcel Shelf Or Tonneau Cover)
- One-pedal Driving
- Pressure Washer
- Receiver-drier (A/C Drier)
- Relative Compression Test
- Rod Knock (Big-end Knock)
- Roll Cage
- Sequential Indicators (Dynamic Turn Signals)
- Summer Tyre
- Trade-in (Part Exchange)
- USB-C Port In The Car
- Valve Stem Seal
- Xenon Headlight (HID)