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Hello I will help you with your question,
The P0500 code is either of the front wheel speed sensors so having a scantool that can see the sensor input allows you to see which sensor is reporting incorrect information and you can see if it is the sensor, the tone ring or the wiring is the problem
The diag for the code is below
Look this over and let me know what further questions you have about this
Unless you have an oscilloscope or a very good multimeter you cannot test the sensors. Or you need a scantool that can communicate with the ABS system in this vehicle.
If you read the diagnosis procedure you will see that only the front sensors are used in the criteria to have this code set. The are the only sensors that provide data to have the code set.
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It is not the rears, be sure to take a look at the wiring as well as the sensors and any rust/corrosion on the tone ring and the sensor mounting.
Usually there will be a fail safe mode if you have warning lights and cooling fan running at all times.
The P0500 is the only code you pulled?
The ABS rings are the tone rings that have ridges the sensors read. If the code resets right away it is not the tone rings.
I need to know a lot more about what has been done and what you are seeing that the warning lights are on (4 which ones?) and the cooling fan runs continuously.
You should hold off on replacing anything until you find out why this is happening as the P0500 may be a false code.
OK part of the code set criteria is to turn the fan on at 50% speed and you would have the Traction control, ABS, MIL and the cruise as a result of the P0500. Go ahead and replace the sensors, you can try one at a time as you have a shorted sensor and maybe you will get lucky the first time. I'm not sure where you got the information to replace the speed sensor in the transmission but that was incorrect
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OK let me know how I can help
The P0700 is a code that directs you to pull the codes from the transmission. Can you get the code from the trans?
You no longer have the P0500 that you replaced the sensors for?
OK the P0700 is a notice to the PCM to turn on the warning light and that there is a code stored in the transmission so you need to pull the transmission codes.
There are many types of scanners and any that can communicate with the transmission computer will be several thousand dollars. The Subaru scantool which has full communication with the systems in this vehicle is the Subaru Select Monitor.
Some of the SnapOn products and the OTC products can communicate as well.
CODE PO500 SENSOR. PUT IN NEW WHEEL BEARINGS. ON BOTH