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Home >> Jeep >> 2021 >> Grand Cherokee L Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 25 (8HP75 Automatic Transmission - DTCS P1D79-00 To U1489) >> Diagnosis And Testing >> U1461-00: Implausible Data Received From ESM On Dpt >> Theory Of Operation

Theory Of Operation

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The purpose of this diagnostic is to monitor the messages from the Electronic Shift Module (ESM) on the Private CAN Bus for the correctness of data length code, checksum and correct behavior of the alive counter.

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