How do I make sure my OBD II scan tool will comply with SAE J 1978?

Question

My 01 Camry underhood sticker says OBD2 Certified. other scan tools work on my car but no my  ELM327 interface.USB.  Which nof the 4 electrical interface do I have for 1MZ-FE ... There is a wire connected to #2.  (One of the 4 positions  that complies) Check the DLC3. (i don't understand this)
The vehicle’s ECM uses ISO 9141–2 for communication.
The terminal arrangement of DLC3 complies with SAE
J1962 and matches the ISO 9141–2 format. How do I change it to one of the 4 my tool works with. 
Other diagnostic equip said:
P300 and P 1780. engine Misfire and Park Neutral Position Switch. I familiraizing myself with the circuit. PNP sensor but the engine misfire is not Plugs or EGR, theyre clean. Vacuum leaks no cruise control and ABS i can't afford all that. dont wanna sell it

Anonym · Accepted Answer

obd /2 is from 1994 and up ,read it and go for the first code on repairs,other than that good luck.do your homework,code 1 first if you have more than one or go to an auto zone clear codes,then after at least 5 minutes of driving or check engine light,rescan and fix that code first

How do I make sure my OBD II scan tool will comply with SAE J 1978?

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