Gravitas FATC Gen 3 DTC Troubleshooting Data Version: 1.0 Date: 15-July-2023 Copyright © TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author. Author: ERC Page: 174 of 301 Lamp Status (If Any) Pre condition: ON. Action : Key press stuck down for more than 30 sec. Correction : During key jam operate the blower with default speed i.e- Speed 2. If Key Jam(Stuck) is cleared,Decrement the speed by each button press.Decrement the speed by each button press from the last default value i.e speed 2. ***Note:- Once Key JAM is detected CCM should enter to default values for that control as or If mentioned above.While in Key JAM condition,CCM should still accept HU inputs if available and update the values. Fault Detection Condition Blower Speed down Request Button - Signal Stuck Low Normal Operating Condition The blower speed can be changed by pressing blower switch up/down Probable Trouble Area Driver side blower Up/down switch component failure. Healing Condition NA Component Details: Driver side blower Up Button is shown in above image. This button used to change the blower speed of HVAC. Preliminary Checks: Switch On the IGN & perform the following check. 1) Connect the Diagnostics tool & check the DTC fault code 2) If the fault code exists, refer the corrective actions
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