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KONNWEI KW903 Mini WiFi Diagnostic Tool is compatible with Android and iOS devices. Capable of detecting and interpreting protocols automatically, it uses AT commands to communicate with a host device via WiFi connection. With proper software installed, you can real real-real time performance data of your vehicle.


  • KW903 is able to detect and interpret these protocols automatically.
  • It also provides support for high speed communications and a low power sleep mode.
  • It uses AT commands to communicate with a host device (PC, notebook, iPhone, iPod touch, iPad and so on).
  • There are plenty of software packages available, which are fully compatible with KW903.
  • Some of them have pretty useful features, such as engine running parameters monitoring, DTC reading and clearing, MPG meter, etc.
  • You can even write your own software on a specified hardware platform if you wish, because the AT commands are fully documented and very well explained.
  • It also comes included with a power switch built-in to prevent the need for having to constantly disconnect your unit from the OBDII port.
  • It is compatible with 1996 and later vehicles.
  • Connecting to your iPhone / iPod touch is made by WiFi connection in adHoc mode.
  • With proper software installed in the host device, you may have following parameters read out from your vehicle:
  • Vehicle Speed
  • RPM
  • Fuel Consumption
  • Engine Coolant Temp
  • Fuel Pressure
  • Calculated Engine Load
  • Throttle Position
  • Intake Manifold Pressure
  • Air Intake Temp
  • Timing Advance
  • Mass Air Flow
  • Fuel Level
  • Barometric Pressure
  • EVAP System Vapor Pressure
  • Fuel Trim


Model KW903
Material Plastic
Range 50 ft (line of sight)
Antenna Internal
Power Consumption 0.75 W (with power switch)
WiFi Standard 802.11a/b/g
Operating Temperature -15 to 100 Degree.C
Connection Type WiFi
Product Weight 22g
Product Size 5 x 2 x 3.6 cm
Package Contents 1 x KONNWEI KW903 WIFI Scanner, 1 x CD, 1 x User Manual

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