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If the ECU successfully processes the request, it responds with a , calculated by adding 0x40 to the request SID. Request: 0x22 Positive Response: 0x62 + Data bytes.

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If an error occurs, the ECU returns a : Byte 0: 0x7F (Universal Negative Response Identifier) Byte 1: The original requested SID (e.g., 0x22 ) If the ECU successfully processes the request, it