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Home >> Jeep >> 2021 >> Grand Cherokee L Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (8HP75 Automatic Transmission - DTCS P0219-00 To P1D78-00) >> Diagnosis And Testing >> P1D25-00: Shift Control Rationality >> Theory Of Operation

Theory Of Operation

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The purpose of this diagnostic is to detect a faulty position on the interface between the shift by wire software and the shift control software. This diagnostic also compares the target position sent to the shift control software to the read back position from this interface.