B2300 SE Regular Cab 2WD L4-2.3L VIN A (1997)
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Power Steering Pressure Switch: Description and Operation
POWER STEERING PRESSURE (PSP) SWITCH
Monitors hydraulic pressure and sends signal to PCM. PCM controls the following:
1. Adjusts idle rpm
2. Adjusts transmission line pressure during increased engine load.
NOTE: This is a normally closed switch that opens as the hydraulic pressure increases.