Use this table to define which sensors are connected to which inputs on the ECU for purposes of datalogging those values. This assignment table is only useful for datalogging purposes and has no effect on the ECU's configuration. You are simply telling the application which sensors are connected to which inputs so that it knows how to treat those inputs while datalogging. The ECU doesn't care about this information. It only cares about which locations to log, not so much which exact sensor is connected to that input.
Once an assignment has changed, hit the Save pin assignments button to save those changes. At that point, you can use the Captured values button to add the new values to the ECU for logging. Use the Display as column to define the default name for that particular sensor in your datalogs. Use the Sensor description column to provide a more complete description of what's physically installed where so that you (and others) will have this information readily available.
The ECU does not generally care exactly which sensor (e.g., GM 3-bar, GM 3.3-bar, AEM 5-bar, etc.) is connected to which input. But there are certain functions where it needs to know where to find a particular type of sensor (manifold pressure or wideband). For example, in order to perform narrowband simulation inside the ECU, the ECU needs to know where it can find a wideband sensor. But it doesn't care which specific brand of wideband sensor is there. It only needs to know which input to sample and compare again when doing the narrowband simulation function.
Use these drop downs to tell the ECU where to find the defined sensors, if they are attached. If they are not attached to the ECU, simply select Undefined.
For the MAP sensor type, there is also the option to select User defined. When User defined is selected, it is up to the user to specify the sensor's pressure per volt scaling and 0 absolute pressure offset voltage. (With some sensors, the 0 absolute pressure offset voltage may be below what is actually achievable by the sensor, such as with the GM 3.3-bar sensor.) If a sensor type other than User defined is selected, the scale and offset values are grayed out and simply display the standard values that correspond to the selected sensor type.
Most often, User defined will be used to accommodate a sensor that has a different offset voltage than that sensor's specification calls for. Changing from a specific sensor type to User defined will start the user-defined settings at the standard values for that type of sensor, and the offset can be easily adjusted from there to produce correct readings from the sensor. Since an offset error is the most likely cause of inaccurate readings, the needed offset can be determined by comparing the engine-stopped (atmospheric pressure) reading to the elevation-adjusted value reported by your local airport or weather station.
If you are using the user-defined scale and offset, you will want to log the sensor as LinBoost so that you can apply the same correction by adjusting LinBoost's display preferences.
Check these boxes to force a hardcoded value for any of the defined inputs. This function is useful when connecting an aftermarket sensor to an ECU input. In that case, you generally want to disable the ECU normal use of that input. For example, if you connect a manifold pressure sensor to the EGR temp input, there's absolutley no reason to have the ECU continue to sample and try to interpet the EGR temp input as an EGR temp sensor. So in that case, you would check the Lock EGR temp checkbox.
© 2002 - 2023 ECMTuning, Inc. All rights reserved.