Overview
The TOPDON AL500B combines engine OBD2 diagnostics with 12V battery load testing in one pocket-friendly device — two common garage tasks without buying separate tools.
Diagnose check-engine codes and verify battery health before winter or after a jump-start. The 2-in-1 design saves space in a mobile toolkit and helps rule out weak batteries as the cause of random electrical faults.
Key Features
- OBD2 engine code read/clear with live data
- 12V battery CCA load test and voltage analysis
- I/M readiness and freeze frame support
- Standalone battery clamps — no extra adapter required
What You Can Diagnose
AL500B helps you identify root causes faster by reading fault codes, live sensor values, and module status across the systems it supports:
- Check engine light (MIL) and powertrain fault codes
- Oxygen sensor, fuel trim, and emissions-related DTCs
- Evaporative emissions (EVAP) system faults
- Catalyst efficiency and misfire monitor status
- Freeze frame data captured at the moment of failure
How to Use This Tool
Plug the AL500B into your vehicle's 16-pin OBD2 port (usually under the dashboard). Turn the ignition to ON — the tool powers from the vehicle and guides you through reading codes in seconds. Use the built-in DTC library to understand each fault, then clear codes after repairs and re-scan to confirm the fix.
Vehicle Compatibility
OBD2 engine diagnostics on 1996+ vehicles. Battery testing for 12V flooded, AGM, and gel types within the tester CCA range.
Always verify that your exact year, make, model, and engine combination is supported before purchase — especially for service resets, bi-directional tests, and brand-specific modules. OBD2 port location is typically under the driver-side dashboard on U.S. vehicles from 1996 onward.
Who Should Buy This
Home mechanics who want code reading and battery testing in one affordable package.
Why Choose TOPDON
Combining scan and battery functions in one TOPDON unit eliminates guesswork when a weak battery triggers misleading sensor codes across multiple modules.
Connectivity & Software Updates
OBD2 cable + battery clamps. Free firmware updates.
