P1DD0 FIAT – Transmission Control Module Monitoring Processor Performance Unallowed Engagement

P1DD0 FIAT Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1DD0 FIAT Possible Causes

Faulty Transmission Control Module (TCM),Transmission Control Module (TCM) harness is open or shorted,Transmission Control Module (TCM) circuit poor electrical connection

P1DD0 FIAT Description

The Transmission Control Module (TCM) monitors the pressure regulator and solenoid logic to detect a failure in the activation of the pressure regulators and solenoids. The pressure regulators are used to control the pressure to the clutches and the solenoids are used to activate the pressure to the parking lock and to the position valve. The commanded currents of all regulators and solenoids are monitored. The monitoring consists of several diagnostic strategies: – Transmission blocking (Multiple clutches locked up) – Wrong driving direction (Incorrect driving direction) – Gear engagement of Reverse gear while driving forward (Unallowed Reverse engagement) – Unwanted engaging or disengaging of Parking Lock (Unallowed Park engagement)