Had the MR2 swapped with a JDM Caldina engine. With this swap I was looking for a way to connect an OBDII scanner and see what’s going on. ELM327 Wi-fi interface for OBDII which cost $8. The only workable option to connect with an app on the iPhone was to use wifi. Apparently the blue tooth version of the ELM327 is not compatable with the iPhone.
I downloaded a free app called EOBD-FACILE to read the outputs of the OBD II.