Speed Proportional Steering

The variable assist speed proportional power steering system, is diagnosed if suspected of not functioning properly, using the Diagnostic Readout Box (DRB) scan tool. The test consists of checking available power steering assist, using the DRB scan tool, to create an electronically simulated vehicle speed of 0 and 60 mph.

The solenoid control valve and solenoid control module are both serviceable components of the variable assist speed proportional power steering gear assembly. Both components are replaceable without requiring removal of the steering gear from the vehicle. Refer to the specific component service in the section for the required replacement procedures.