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: 76 of 202 B1F1D-15:- Fresh Air/RECIRC Feedback Signal - Circuit Short to Battery or open; ISO Code B1F1D- 15 Customer Symptom System is less responsive to user control and environmental conditions Fault Effects (On Vehicle) 1) If Motor learning is in process, end stops will not be learnt properly 2) Motor will not be positioned accurately Lamp Status (If Any) When Air inlet feedback signal STS is detected, motor will stay at current position. Thereafter if any new user request/AUTO comes, motor will be driven on Time basis. Fault Detection Condition Fresh/RECIRC Door Control Motor Feedback Line - Circuit short to battery or open Normal Operating Condition With the Fresh/RECIRC feedback line connected to the harness and with Ignition ON, check the voltage between pin no 13 of blue connector & ground. The voltage range should be in between 0.4 to 4.47 V Probable Trouble Area 1) Sensor connector is not connected firmly (open) 2) Sensor signal short to Battery Healing Condition If there is a continuity between the Air Inlet door actuator Feedback line and Battery line correct the wiring harness (wiring harness short to battery) Component Details: The recirculation/fresh air selector door actuator motor controls the position of the door which allows fresh air or recirculation air, or a combination of the two, into the vehicle. The motor is mounted on the recirculation /fresh air duct. Preliminary Checks: Switch On the IGN & perform the following check. 1) Connect the Diagnostics tool & check the DTC fault code 2) Read ECU parameter value Target Position of Air-Inlet Door Flap and AI Door flap Position (Internal Value) for actual and target position of Actuator
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