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ELM327 is the latest PC-based scan tool. It supports OBD-II protocols and is dispatched with a number of compatible programs. ELM327 OBD-II Software is a free program that allows you to use your PC and a hardware interface to get the information from your car's computer.

Features:
- Very user-friendly, easy to learn, and easy to install.
- The processor is an ELM327.
- The output protocol (connection to laptop) is USB.
- The software supports two platforms - DOS and Windows.
- Read diagnostic trouble codes, both generic and manufacturer-specific, and display their meaning (over 3000 generic code definitions in the database).
- Clear trouble codes and turn off the MIL ("Check Engine" light).
- Display current sensor data, including:
~ Engine RPM
~ Calculated Load Value
~ Coolant Temperature
~ Fuel System Status
~ Vehicle Speed
~ Short Term Fuel Trim
~ Long Term Fuel Trim
~ Intake Manifold Pressure
~ Timing Advance
~ Intake Air Temperature
~ Air Flow Rate
~ Absolute Throttle Position
~ Oxygen sensor voltages/associated short term fuel trims
~ Fuel System status
~ Fuel Pressure
~ Many others...

Specifications:
- OBDII Protocols:
~ ISO15765-4 (CAN)
~ ISO14230-4 (KWP2000)
~ ISO9141-2
~ J1850 VPW
~ J1850 PWM
- Baud rate: 9600 or 38400
- Indicator LEDs: OBD Tx/Rx, RS232 Tx/Rx, Power
- Operating voltage: 12V, internal protection from short circuits/overvoltages
- Nominal idle current: 45mA
- Color: Back + Orange + Blue
- Item Size: 8.8 * 4.6 * 2.5cm
- Package Size: 20 * 15 * 2.5cm
- Item Weight: 250g
- Package Weight: 350g
- USB Cable Length: 176.5cm

Free software:
- Scantool.net
- GM Mode 22 Scan Tool by Terry
- OBD Gauge for PalmOS and Pocket PC by Dana Peters
- OBD Logger by Jonathan Senkerik
- OBD-II ScanMaster by Wladimir Gurskij (ScanMaster 3.52 - local copy)