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Home >> Chrysler >> 2012 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 23 (Transmission Control Module (TCM) - DTCS P1D94 To U1479 - 8HP45 Automatic Transmission) >> Diagnosis And Testing >> P1DB8-Unintended Torque Applied While In Neutral >> Theory Of Operation

Theory Of Operation

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The purpose of the diagnostic is to detect an unwanted power flow in the transmission. A rationality check of the ratio of input speed to engine speed is done while no power flow is requested.