TECH INFO


Bluetooth Connection Guide

Part one of this guide is only required once. After you have paired your module and downloaded the Blue Flex application you only need to perform Part2 to connect to your FlexConverter module.

 

Part1:

  • Download the Blue Flex application from the Google Play store
  • Turn vehicle's key ignition to "Run" to power up FlexConverter module
  • Open "Settings" from your phone's app menu
  • Open Bluetooth settings menu
  • Select "Scan for Devices"
  • The "FlexConverter" bluetooth device should appear
  • Tap the FlexConverter device and select "Pair"
  • When prompted for a password, use the password "1234"
  • Your phone should verify that the device has been paired successfully

 

Part2:

  • Open the Blue Flex application and Select "List Devices"
  • Select the "FlexConverter" device
  • Select "Connect" and wait for the app to connect
  • You should now be connected and viewing your ethanol content and fuel temperature

Note: If the app fails to connect, select "Connect" again to retry connection

 

Wiring Information

Universal Module:

  • Red - Key Ignition switched 12v
  • Black - Ground
  • Yellow - 0-5v analog output for ethanol content

Plug-and-Play Module

Our plug-and-play modules require no wiring and need only be plugged into their appropriate engine harness connectors. Below is a list of the connectors that must be utilized for the module variants.

TGV Signal - Unplug the Rear O2 Sensor and connect the grey 4pin male connector to the Rear O2 chassis harness connector. Connect the Rear O2 Sensor to the grey 4pin female connector from the module harness. Connect the black 3pin male connector to either the right or left TGV sensor engine harness connector.

Rear O2 Signal - Connect the grey 4pin male connector to the Rear O2 chassis harness connector.

None (Passthrough on Rear O2): Unplug the Rear O2 Sensor and connect the grey 4pin male connector to the Rear O2 chassis harness connector. Connect the Rear O2 Sensor to the grey 4pin female connector from the module harness.

 

Calibration Mode

Because analog signals can be affected by grounding and signal wire resistance, the ECU may see a slightly different voltage than what the module is sending. This is an issue with all analog(voltage) signals but FlexConverter.com modules have a built in calibration mode to allow the module's analog output signal to be fine tuned to the ECU. Our modules output 0.5volts for 0% ethanol and 4.5volts for 100% ethanol; but, for example, the ECU may read 0.53volts at 0% ethanol and 4.54volts at 100% ethanol. To determine the correct voltage to ethanol content conversion factor you must know the exact voltage the ECU reads for 0% and 100% ethanol. When the calibration mode is activated, the module will loop through artificial ethanol contents and output the voltages for them accordingly. The module will start at 0% ethanol and work up to 100% ethanol in 25% increments (0%, 25%, 50%, 75%, 100%) every 8-seconds. Most users will only need to know the voltages at 0% and 100%, included below are excel sheets for various vehicles that will calculate a conversion factor for datalogging and show how to implement ethanol content logging into your datalogging software.

 

Activating calibration mode:

  • Turn vehicle's key ignition to "Run" to power up FlexConverter module
  • Open the Blue Flex application and Select "List Devices"
  • Select the "FlexConverter" device
  • Select "Connect" and wait for the app to connect
  • Select "CAL ON" to begin calibration mode
  • Select "CAL OFF" when done or turn the ignition key off

Note: If the module does not begin cycling through 25% increments of ethanol content after 5-10 seconds, select "CAL ON" again.

 

Datalogger Definition Modifications

Use the links below to download an excel spreadsheet containing information on setting up your datalogger definitions and conversion factor calculation.