P1D6C FIAT – Thermal Damage To Clutches

P1D6C FIAT Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1D6C FIAT Possible Causes

Vehicle User Driving Habits,Transmission Hydraulic System,Transmission Mechanical Operation,Faulty Transmission Control Module (TCM)

P1D6C FIAT Description

This diagnostic determines if the temperatures of the odd and even clutches are excessive and is based on a model which estimates wear rate and temperature of odd and even clutch. The main inputs to the model are engine speed, wheel speed, engine torque, odd clutch speed, even clutch speed and engine temperature. The model outputs are the estimated clutch temperatures and a clutch wear rate which can assume one of three values corresponding to normal, intermediate or critical wear rate. The diagnostic fails if the model estimates: A critical wear rate which means that the clutch is being damaged due to overheating. An intermediate wear rate which means that the clutch temperature is increasing and the clutch is overheating. An instantaneous temperature greater than a threshold.