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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 23 (8HP75 - DTCS P1D91-00 To U3002-00) >> DTC Troubleshooting >> P1DB2-00-Actuator Supply Voltage A Circuit >> Theory Of Operation

Theory Of Operation

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The voltage supply circuit(s) for the solenoids and pressure regulators are monitored for open circuits, shorts to ground, and shorts to voltage. If a failure is detected, the Transmission Control Module (TCM) will deactivate the affected power supply circuit and set a corresponding Diagnostic Trouble Code (DTC) relevant to the fault that was detected.