Power Steering Pressure Switch

Power Steering Pressure Switch

The Power Steering Switch is used to determine when power steering is actively loading the engine. This allows a signal to be sent to the ECU so that it can compensate for this when the system exceeds power steering load limits - such as by stabilising the idle speed of a car while the steering wheel is on full lock to either the left or right. If you are using a pressure sensor for this purpose, see the Power Steering Pressure sensor. 



The main node can be used to enable and configure the Power Steering Switch input type and wiring.

Options

Power Steering Switch Input Mode - Select 'Digital - Switched' if the switch is wired directly to the ECU. 

Connections

This area configures the physical input assigned to the Power Steering Switch input. Both Analog Inputs and Digital Inputs can be used for the Power Steering Switch. Since the switch is an on/off sensor, voltage thresholds must be configured if using an Analog Input, or the Edge Select set if using a Digital (SPI) input.

Generally, the Power Steering Switch is wired between the ECU input and ground, and therefore can be set up as follows:
      If wired to an Analog Input, set the On Voltage to 2.0v, the Off Voltage to 3.0v, and enable the Pull Up setting. This will hold the input at 5v until such time that the Switch closes, pulling the input to ground. If your switch is a Normally Closed sensor, swap the On and Off voltages.
      If wired to a Digital (SPI) input, set the Edge Select to Falling, Sensor Type to Hall Effect and Pull Up to Enabled. This will hold the input at 12v until such time that the Switch closes, pulling the input to ground. If your switch is a Normally Closed sensor, swap the Edge Select value to Rising.

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