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Home >> Chrysler >> 2012 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (Transmission Control Module (TCM) - DTCS P0219 To P1D93 - 8HP45 Automatic Transmission) >> Diagnosis And Testing >> P1634-TCM Internal - Internal Watchdog Performance >> Theory Of Operation

Theory Of Operation

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The purpose of the diagnostic is to monitor the presence of all inhibit path functionality that are needed to bring the Transmission Control Module (TCM) to a safe state in case of a failure. Proper inhibit path operation means that the TCM is able to switch off a single output stage and it is able to switch off all output stages by, switching off the output stages power supply (high side switch), activating the peripheral reset line or deactivating the peripheral clock.

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