The Cybrid Power Steering System was standard equipment on the XT6. It’s a computer controlled,
electric motor-driven hydraulic steering system, using a power-assisted rack and pinion assembly similar to the XT. This system provides improved steering feel and more precise power assist over a wider operating range. Fuel consumption is reduced because it requires less horsepower due to the electrically-driven hydraulic pump. The specific system used on the XT6 is quicker than other XT power steering systems, with just 3.2 turns lock-to-lock.
• The Motor and Pump assembly mounted on the front bulkhead (firewall).
• A Steering Sensor located inside the vehicle at the base of the steering column.
• A Signal Controller located in the left rear quarter panel.
• The Power Controller mounted on the front bulkhead (firewall) to the left of the Motor/Pump assembly.
The Motor/Pump assembly is similar to a starter motor, since it has an armature, fields, and brushes which are serviceable. The electric motor drives a pump which is very similar in design to an engine driven pump. This combination replaces the familiar belt driven P/S pump assembly. The Cybrid System requires special hydraulic fluid to retain stable viscosity during cold temperatures.
The Pump incorporates an electric heater to warm the hydraulic fluid in extremely cold operating conditions, improving the steering performance. A thermistor type switch located on a bracket above the Motor/Pump assembly, senses the underhood (ambient) temperature and sends an input to the Signal Controller.
The Heater operates for approximately five minutes after engine start-up. The Signal Controller grounds the heater relay, which passes battery voltage to the heater. The heater relay is located near the motor/ pump assembly.
Note: The Heater only works when the thermometer signals an extreme cold condition.
Subaru’s power steering system contains a pump, hydraulic line, and a gearbox (rack). The hydraulic pump is a vane-type pump driven by the engine. It provides pressurized fluid for the system.
Oil Pump Operation
The pump has two internal valves: a flow control valve and a relief valve. The flow control valve regulates the volume of power steering fluid delivered to the rack. During high engine rpm, the pressure in the pump overcomes the flow control valve spring. The control valve slides back to close off an oil passage to the rack and to open an oil return port to the pump inlet. This reduces the power assist to the rack during high speeds, improving the steering wheel feel and response.
If you want to own a really cool and really rare piece of Subaru history you should take a look at this XT6:
I have a 1989 Subaru XT6 5 speed with full time all-wheel drive and low miles. It is a 2.7 liter flat six cylinder engine and functioning air ride suspension. I’ve had the car for two and a half years now and it looks completely different from when I bought it. I’ve spent more hours working on it than I would probably like to admit. It has a new water pump, new timing belts, new fuel pump, new radiator, new plugs, new tranny and rear diff fluid, and four new tires, new exhaust. Over this previous summer the whole car was sanded, cleaned up, dents removed and straightened the whole body. It has a fresh coat of factory Subaru red and it looks awesome, you need to see it in person to really appreciate it. Countless hours put into it. I really don’t want to sell this awesome car but it is a historic subaru that deserves to be kept clean and taken on the occasional cruise. I’d accept trade offers preferably a subaru or truck but shoot me an offer.
Is this 1989 Subatu XT6 a good deal or something that should be skipped? It’s from Wisconsin so I would be weary of rust, but it looks pretty rust free to me. I would inspect underneath the car however to be sure. What does everyone else think? Comment below!