Throttle Position Sensor

Throttle Position Sensor

TPS Settings

A Throttle Position Sensor (TPS) is required by the ECU for many purposes. It can be used for the primary load input for some applications. It is also used with Idle Control, Decel Cut, Transient Throttle, and many other functions. A TPS is a powered sensor that typically has three wires. A 5V+, a signal wire to the ECU, and a Signal Ground.



On this node, the TPS calibration can be performed, along with manual scaling of the TPS Voltage vs Position.


TPS Calibration

A calibration must be performed when a new TPS is installed, the TPS has simply been removed and replaced, or it's position has changed. This is to ensure the ECU knows when the throttle is fully shut and when it is fully open.

The calibration can be completed using one of two methods. This is by either using the TPS Calibration wizard, or by manually entering the 0% TPS voltage and the 100% TPS voltage in the calibration graph below the wizard.

TPS Calibration Wizard

The on screen process will guide you through the calibration. Be sure to read and follow all on-screen instructions to complete the calibration successfully.

Begin the calibration process by pressing the Start button.
  1. Step 1 is to find the TPS voltage for closed throttle.
  2. Step 2 is to find the TPS voltage for wide open throttle.
And now the calibration is complete.

The calibration can be manually altered by directly entering voltages for 0% and 100% throttle amounts.

Filter



This table sets the filter for the Throttle Position value. A higher filter will increase filtering on the signal, but will delay the value used by the ECU for calculations. A lower filter will decrease filtering on the signal improving responsiveness to the signal but may allow noise to affect the value used by the ECU for calculations.

It is recommended that this filter only be adjusted if the TPS signal acts erratically under normal operating conditions. This value is the time constant for the TPS value to make a 63% change from the old value to the new one. Default - 2ms

Derivative Filter



This table sets the derivative filter for the Throttle Position value. 

TPS-Derivative is used as a rate of change channel for the TPS. Too high can dull response, too low can give unstable readings and false trip the Transient Throttle function.

Diagnostics



This node allows the enabling of high and low voltage DTCs on the Throttle Position input.
A DTC severity can be set for each voltage, which will trigger an Engine Protection level for the relevant setting.

Wiring



This node allows you to assign the input for the Throttle Position sensor. 
Throttle Position Sensors use an Analog Input. Any available AVI can be used.
It is recommended to disable the Pull Up.




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