Q5/X451 FATC DTC Troubleshooting Data Version: 1.0 Date: 16-Oct-2018 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: 132 of 202 Trouble Shooting:- Is DTC B1F39 -23 is Present? Check for Fresh Air / Recirc Request Button functionality. Check the Fresh Air / Recirc shall be change by pressing Fresh Air / Recirc button Is Fresh Air / Recirc button stucked? Check and lubricate switch if still the Fresh Air / Recirc button is stucked then replace control panel. Clear the DTC from the ECU memory. Turn Ignition OFF & ON. Check the Fresh Air / Recirc shall be change by pressing Fresh Air / Recirc button Stop Stop YES NO YES NO Turn ON Ignition. Connect the TML Diagnostic Tool. Check the status of DTC’s (Memorized/Current) Record the DTC & Clear DTC’s Turn Ignition OFF & ON Verify If DTC B1F39 – 23 is present
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