OBD2 and OBD2B

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JSPECHB

Junior Member
Whats the difference between a OBD2 and OBD2B ecu's? Will a 99-00 Si ECU work on a ITR? Si is just OBD2 and ITR is OBD2B.
 
OBD2A = 96-98
OBD2B = 99+ (99-01?)

Connectors are physically different. The ECUs are very different internally. Interchangeability depends on year.
 
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