to and Using the Analog Data Logging Inputs
There are eight data logging inputs available on the EBL
products. They are for devices that output a voltage within the range
of 0 to 5 volts. Connecting a device that outputs a voltage higher then
5 volts can damage the EBL board.
The What's Up Display
(WUD), logs these eight inputs. It will also display a WB set up and a
fuel/oil pressure sensor in real time. The input data type and range is
set within the Preferences dialog, ADC Channels tab. There are a
handful of devices built in, it is also easy to create a User Device
and select it in the Preferences dialog.
The following two
sections show how to connect to the EBL Flash ECM, and then the EBL P4
and EBL SFI-6 ECMs. In closing a universal section on setting up
the WUD Preferences dialog is shown.
end cover of the EBL Flash ECM has a opening with a rubber grommet.
This is used to pass the device wires through to the terminal strip.
Can see the round opening with the terminal strip right behind it here:
the terminal stripe, note the 7 - 0 markings on the front of the board.
They are the ADC Channel number for the WUD ADC Channels dialog:
left most terminal labeled 'S' is a serial output. It is 0 - 5
volts and is inverted from the normal serial data polarity. The three
terminals marked 'GND' are grounds. They can be used as a light-weight
ground source for devices. Using it for a g-meter is OK. Do not use them for something like a WB heater ground (current is too high).
EBL P4 and SFI-6 ECMs do not provide direct access to the ADC terminal
strip inside of the ECM. There are several methods that can be
used to get the wires into the ECM. Most of how this is done is
dependent upon how the ECM is installed into the vehicle.
Note the 7 - 0 markings on the front of the board. They are the ADC Channel number for the WUD ADC Channels dialog:
The two terminals on the left labeled 'GND' should not
be used. They are also going away. The reason is that the path is
through the EBL P4/SFI-6 PCB and then through the MEMCAL socket. This
can affect the operation of the EBL board.
Here is what one
enterprising EBL user did. A small hole in the end of the ECM with a
grommet. The WB output wire is fed through the grommet and connected to
the terminal strip:
We did this for one particular installation. Similar to above but on the top of the case with a larger opening:
approach is to use a set of DB-9 connectors. Can mount one to the case,
or leave it free hanging from an opening as show above. Wire all eight
channels to it to make it easy to add devices, along with making it
easy to R&R the ECM. Shown here are both crimp style and solder cup
style. Don't forget the plastic hood (not shown):
the ultimate install, can run wires from the terminal strip to
available pins on the ECM harness connectors. There are enough unused
pins on the EBL SFI-6 ECM for all eight channels. The EBL P4 ECM has
enough unused pins for only five channels. These will be listed a
little further down. The devices can then be wired directly into the
ECM harness connectors. Here is how it is done, wires on the terminal
The wires fed as two bunches around a component and under the heat sink. Note the sleeving to protect the wires:
wires dressed upward and around the raised pads on the connectors. The
raised pads are right up against the case, so the wires need to be
lower then the pads:
The wires then soldered to the available connector pins:
finger nail polish was used to glue the wires in place. Super-glue is
also good for this. Be sure to keep the wires off of protruding pins
from the other components. They can eventually cut through the
insulation and cause problems.
For the above example here are the harness connector pins used (EBL SFI6 only):
For the EBL P4 ECM, here are the available pins:
E1, E2, B2, C2, & C14
If the '7730 ECM is used (not the '7749),
there are additional pins. These have traces on them but are open
ended. This may cause them to pick up electrical noise. But if using a
low impedance source this won't be an issue. Those pins:
C10, C13, & C15
That will allow all eight ADC Channels to be brought out to the ECM harness connectors.
WUD Set Up for the ADC Channel Inputs:
In the What's Up Display (WUD), open the Preferences dialog (ALT+F, F):
on the ADC Channels tab for the set up dialog. Then click on the drop
down for the channel of interest. In this case we have the TT-1 WB unit
on channel 0, and a fuel pressure sensor on channel 1:
All set up, just need to click OK:
the two Preferred buttons being depressed. The one for the WB has that
channel being used for WB VE Learns, and to place the WB reported AFR
on the main and the trip displays. The one for the Fuel has that data
placed on the main display.
They also get there own columns to present that data in the analysis of the log files via the WUD.
pressure sensors easily pickup the pressure fluctuations of the
injectors opening & closing, along with the pulses from a positive
displacement fuel pump. Setting the filter for that channel to 30%
helps to smooth the data. It is also helpful to use a small (.032")
orifice in a fitting that feeds the fuel pressure sensor as a
If the drop down menu for the Device
doesn't have the one you need, can make a User Device. Once created it
will be added to the drop down menu selections. There is a tutorial on
how to create User Devices in the What's Up Display Help document
supplied with the EBL systems (it is easy).