Power Steering Switch

POWER STEERING PRESSURE SWITCH










OPERATION
- The power steering pressure switch converts presence/absence of power steering load into low/high voltage and inputs it to the engine control module, which then controls the idle air control motor based on this signal.
- The battery voltage in the engine control module is applied through a resistor to the power steering pressure switch. Steering operation causes the power steering oil pressure to increase, turning the switch on. As a result, continuity is produced between the battery voltage applied and ground. This causes the power steering pressure terminal voltage to go from high to low.




INSPECTION
Using Scan Tool




Checking Oil Pressure




HARNESS INSPECTION
Measure the power supply voltage
- Connector: Disconnected
- Ignition switch: ON
Voltage (V): Battery positive voltage
OK: STOP
NG: Repair the harness. (A1-54)

POWER STEERING PRESSURE SWITCH CHECK
Refer to On-vehicle Service.