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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 >> P1DAC-Engine Speed Undetermined >> Theory Of Operation

Theory Of Operation

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After the controller is reset, the microprocessor checks the integrity of each RAM location by writing to it and reading back from it. The read value should be the same as the written value. The MIL will illuminate and the transmission will be placed into limp-in after 10 seconds of problem identification.

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