Steering: Testing and Inspection

Power Steering Pressure Test





Test Equipment

Installing Test Equipment
To install the pressure test equipment:
^ Place a suitable drain tray below the PAS pump.
^ Install a hose clamp on the reservoir to pump hose prior to disconnecting any hoses, to avoid unnecessary loss of fluid.
^ Disconnect the hose from the PAS pump high pressure outlet.
^ Install the pump outlet to hose adaptor. Do not omit the O-ring.
^ Connect the pump adaptor to control valve hose of the test equipment.
^ Install the adaptor in the high pressure hose previously removed from the pump outlet.
^ Connect the connector of the test equipment hose to the adaptor.
^ Remove the hose clamp from the reservoir hose.
^ Start the engine.
With the control valve OPEN and the engine idling, the following system pressures may be checked:
^ During turning.
^ When the steering is held on full lock.
^ With the steering at rest.

WARNING: TO AVOID EXCESSIVE HEATING OF THE PAS PUMP, DO NOT CLOSE THE VALVE FOR LONGER THAN NECESSARY.

WARNING: DO NOT DRIVE THE VEHICLE WITH THE TEST EQUIPMENT INSTALLED.

With the control valve CLOSED the pump maximum output pressure can be checked.

Removing Test Equipment
To remove the test equipment:
^ Install a hose clamp on the reservoir to pump hose.
^ Removing the test equipment is a reversal of the installation instructions.
^ Install a new O-ring to the PAS pump high pressure outlet to hose connection.
^ Install the original hose to the PAS pump.
^ Remove the clamp from the reservoir to pump hose.
^ Top-up the reservoir fluid.
^ Bleed the PAS system;

Refer to PDU User Guide
The PDU will diagnose all electrical components of the system.
Before changing a component, check fuse No. 12 (10 A) in the left-hand wheelboard fuse box. However, if this fuse is faulty a number of other components will also fail to function.