Focus L4-2.0L (2009)
Power Steering Pressure Switch: Description and Operation
Engine Control Components
Power Steering Pressure (PSP) Switch
Engine Control Components
Power Steering Pressure (PSP) Switch
The PSP switch monitors the hydraulic pressure within the power steering system. The PSP switch is a normally closed switch that opens as the hydraulic
pressure increases. The PCM provides a low current voltage on the PSP circuit. When the PSP switch is closed, this voltage is pulled low through the
SIG RTN circuit. The PCM uses the input signal from the PSP switch to compensate for additional loads on the engine by adjusting the idle RPM and
preventing engine stall during parking maneuvers. Also, the PSP switch signals the PCM to adjust the transmission EPC pressure during increased engine
load, for example during parking maneuvers.
Typical Power Steering Pressure (PSP) Switch
Typical Power Steering Pressure (PSP) Switch
Power Steering Pressure (PSP) Sensor
Engine Control Components
Power Steering Pressure (PSP) Sensor
The PSP sensor monitors the hydraulic pressure within the power steering system. The PSP sensor voltage input to the PCM changes as the hydraulic
pressure changes. The PCM uses the input signal from the PSP sensor to compensate for additional loads on the engine by adjusting the idle RPM and
preventing engine stall during parking maneuvers. Also, the PSP sensor signals the PCM to adjust the transmission EPC pressure during increased engine
load, for example, during parking maneuvers.
Typical Power Steering Pressure (PSP) Sensor
Typical Power Steering Pressure (PSP) Sensor
