My o/d light flashes when I'm driving the car. I want to know if the GS300 and the SC300 have the same diagnostic system inside the engine? Such as the same ports with same lettering. If some one had this problem before with there GS can they tell me what two ports they used to placed the jumper.

 

Yes it's the same jumper. I have the full GS shop manuals at home so I can check trouble shooting later today. It will be for the GE but it seems that its almost all the same.