{Osprey CCM} DTC Troubleshooting Data Version: 2.0 Date: 28-Jul-17 Author: ERC Page: 156 of 244 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. B1F21-15:- Air Distribution Feedback Signal – Circuit Short to battery or Open;: ISO Code B1F21- 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) NA Fault Detection Condition Mode Door Control Motor Feedback Line - Circuit short to Battery or open Normal Operating Condition ) With the Mode feedback line connected to the harness and with Ignition ON, check the voltage between blue connector pin no 9 & ground. The voltage range should be in between 0.9 to 3.9 V Probable Trouble Area 1) Sensor connector is not connected firmly (open) 2) Sensor signal short to Battery Healing Condition NA Component Details: The Mode Door Actuator controls the direction of airflow. It selects which way air flows through the different ducts. 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 Mode Door Flap and Air Distribution Mode Door flap Position (Internal Value)for actual and target position of Actuator
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