Have Toyota Questions? Ask a Mechanic for Answers ASAP
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
In order to know where to begin to determine what has failed the first thing you need to do is to scan the computer system to see what the fault code and or codes are that are setting when the check engine and 4WD lights are coming on. If you can get this done and post back with the fault codes I will try and help you determine the cause. The compressor ratting is a separate issue and not related to the other problems you are having.