OBD2 indicators, fuel level and gear

Connectivity OBD2
1

GEAR

In OBD2 connection, Gear is calculated per speed and your vehicle gear ratios:

  1. Go to RealDash ‘Settings->Units & Values’ and set Vehicle speed source as ‘ECU Speed Sensor’
  2. Go to Garage, open vehicle door and tap gear shifter
  3. Enter your vehicle gear ratios. Use 0 on unused gears.
  4. Tap vehicle tire and set your vehicle tire size (driving wheel).


    FUEL LEVEL

While fuel level is part of OBD2 standard, many vehicles do not send this information to OBD2 port via SAE-Standard PID.

By default, fuel level is set to ‘Calculated’. You can adjust the fuel level from Quick Settings (‘Gear’ icon on bottom right). While fuel level is part of OBD2 standard, many vehicles do not send this information to OBD2 port. You can still try to see OBD2 fuel level on RealDash:

  1. Open ‘Settings->Units & Values->Input Mapping’
  2. Find ‘Fuel Level’, select it and select ‘Remove’ on burger menu on the right.

This will remove the mapping of using calculated fuel level to use the input directly.


You can use OBD2 monitor to check if your vehicle is sending the info to standard PID.

  1. Go to OBD2 connection settings and tap ‘OBD2 monitor’
  2. Type commands
    ATSP0
    0100
    012F

The reply to 012F command is the fuel level vehicle reports.


TURN SIGNALS AND OTHER INDICATORS

Turn signals and other indicators are not part of OBD2 standard, but there are basically 3 ways to get turn signal and other indicators work on OBD2 vehicles.

  1. Use vehicle specific PIDs. If PIDs are known, you can add those into RealDash OBD2 values by modifying and importing the XML file. See ‘Customizing OBD2 Communications’ from our manuals: realdash.net/manuals/customizing_obd2_communications

  2. Use extra IO box, like SPLeinonen DashBox (www.spleinonen.com). These solutions have extra inputs that can be wired to indicators.

  3. Use DIY solution like Arduino with our open RealDash CAN protocol to transmit indicator statuses to RealDash. See ‘RealDash CAN’ from out manuals: realdash.net/manuals/realdash_can

1 Like
2

Hi I am into my second year as a premium subscriber and finally tried to set the fuel values by following the steps provided by you .though I tried these steps I could go beyond 1. Open ‘Settings->Units & Values->Input Mapping’ → 1. Find ‘Fuel Level’, select it and select ‘Edit’ on burger menu on the right.—>In ‘Select Source Input’ screen, find ‘ECU Specific ,beyond this I couldnt proceed because I couldnt find “OBD2” Fuel Level’ and tap ‘Select Input’

I have attached some images of my screen for help

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3

Any suggestions please…

4

@realdashdev any help if possible. Thanks

5

Yes, unfortunately to write-up was done in 2019 and is not 100% accurate anymore. I did edit it not to mislead others anymore.

If you want to read fuel level from the OBD2, first thing you need to do is to verify that your vehicle is actually responding to fuel level PID (many vehicles do not)

  1. Go to OBD2 connection settings and tap ‘OBD2 monitor’
  2. Type commands
ATSP0
0100
012F

If your vehicle responds with meaningful fuel level value, you can remove the input mapping for the fuel level, as described in now updated first post.

6

Thanks a lot for the information