AUTEL AL439 OBDII & Electrical Test Tool AUAL439 The AutoLinlt AL439 OBD II & Electrical Test Tools supports a/110 modes of OBD II test for a complete diagnosis. Featuring the unique patented One-Click liM Readiness Key, graphing digital Multimeter, starting and charging systems tests,TFT color display , and built-in speaker, the versatile, easy-to-use AL439 will streamline automotive service and help ensure rapid, accurate diagnosis and timely repair. Works on ALL 1996 and newer vehicles (OBD II & CAN)?? domestic and import Features the unique patented One-Click 1/M Readiness Key for quick State Emissions readiness check and drive cycle verification Easy to read AVOmeter allows you to test voltage, resistance, wiring, switches, duty cycle and more at the fingertip Capable of diagnosing 12v charging systems and starting systems Bright color coded LEOs 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 (PO, P2, P3, and UO), manufacturer specific (P1, P3, and U1) codes and pending codes Turns off Check Engine Light (MIL), clears codes and resets monitors Displays monitor and 1/M readiness status (emissions) Reads live PCM datastream, live 02 sensor test data, freeze frame data Graphs data (1996 and newer) CodeCause/Solution tips guide technicians to the root cause of trouble code faster, savmg 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 Print data via PC