POWER STEERING PRESSURE SWITCH CHECK

1.Disconnect the power steering oil pressure hose from the oil pump (Refer to ), and then connect following special tools. Power steering oil pressure gauge (MB990662) Oil pressure gauge adapter A (pump side) (MB991548) Oil pressure gauge adapter B (hose side) (MB991549) 2.Bleed air, and then turn the steering wheel several times while the vehicle is not moving so that the temperature of the fluid rises to approximately 50 - 60°C. 3.The engine should be idling. 4.Disconnect the connector for the oil pressure switch, and place an ohmmeter at the switch. caution The pressure gauge shut-off valve must not remain closed for more than 10 seconds. 5.Gradually close the shut-off valve of the pressure gauge and increase the hydraulic pressure, then check whether or not the hydraulic pressure that activates the switch is the standard value. Standard value: 1.8 - 2.4 MPa 6.Gradually open the shut-off valve and reduce the hydraulic pressure, then check whether or not the hydraulic pressure that deactivates the switch is the standard value. Standard value: 0.8 - 2.4 MPa 7.Remove the special tools, and then tighten the power steering oil pressure hose to the specified torque. Tightening torque: 57 ± 7 N·m 8.Bleed the system (Refer to ).