SAE J1979/ISO 15031-5 set includes the communication between the vehicle's OBD systems and test equipment implemented across vehicles within the scope of the legislated emissions-related OBD.
Rationale: Create a J1979-1 document to continue revisions to J1979 until the document is stabilized. Create a J1979-2 document to add ISO 14229 services to J1979 and remove legacy services. ISO14229 services will be adopted by CARB in the next OBD rulemaking.
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