Product Details

With our unique patented One-Click I/M Readiness Key, circuit test, starting and charging systems test, TFT color display, built-in speaker, the versatile, easy-to-use AL439 will streamline your automotive service and ensure rapid, accurate diagnosis of a range of systems from batteries to EOBD II.


  •  Works on ALL 1996 and newer vehicles (OBD II & CAN)-domestic and import
  •  Features the unique patented One-Click I/M Readiness Key for quick State Emissions readiness check and drive cycle verification
  •  Easy-to-read AVOmeter allows you to read voltage and resistance at the fingertip
  •  Capable of diagnosing 12V charging systems, starting systems and condition of discharged battery
  •  Bright color coded LEDs and built-in speaker provide both visual and audible tone for readiness verification
  •  Easily determines the cause of the Check Engine Light ( MIL)
  •  Retrieves generic (P0, P2, P3, and U0), manufacturer specific (P1, P3, and U1) codes and pending codes
  •  Turns off Check Engine Light (MIL), clears codes and resets monitors
  •  Displays monitor and I/M readiness status (emissions)
  •  Reads live PCM datastream, live O2 sensor test data, freeze frame data
  •  Graphs data (1996 and newer)
  •  Troubleshooter code tips guide technicians to the root cause of trouble code faster, saving diagnosis and repair time
  •  Memory/battery backup for off-vehicle data review and analysis
  •  Multilingual menu and DTC definitions- English, Spanish and French, etc.
  •  Retrieves vehicle information (VIN, CIN and CVN)
  •  Internet updateable and upgradeable
  •  Prints data via PC


Display TFT color display (320 x 240 dpi)
Operating Temperature 0 to 60°C (32 to 140 F°)
Storage Temperature -20 to 70°C (-4 to 158 F°)
LengthWidthHeight 147 mm (5.79”)96.4 mm (3.80”)37 mm (1.46”)
Weight 0.3kg (0.8lb, without wire) or 0.68kg (1.82lb, with wire)

What's included?

  •  Probes
  •  3.7V Li-ion battery
  •  CD
  •  Protective Nylon Case
  •  USB Cable
  •  OBDII Cable
  •  User's Manual