OBD-II protocols used on Scion All models 1999

Protocol
ISO-9141
SAE J1850 10.4kbps (VPW)
The ELM-USB OBD-II USB interface and OBDTester diagnostic program support these protocols.

OBD-II connector pinout for ISO9141 Scion

OBD-II connector pinout for SAE J1850 VPW All models

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