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: 29 of 202 B1F2E-11:- Air Distribution Motor Drive Line– Circuit short to Ground; ISO Code B1F2E- 11 Customer Symptom No air distribution (mode) control (manual or automatic) Fault Effects (On Vehicle) If polarity of motor lines is affected by fault, motor will move to either end stop Lamp Status (If Any) Motor To be Disabled Fault Detection Condition Mode Door Control Motor Drive Line - Circuit short to ground Normal Operating Condition With the Mode motor drive line connected to the harness and with Ignition ON, check the voltage between blue connector pin no 5 & ground or 21 & ground of the Connector. The voltage range should be in between 0 to 14 V Probable Trouble Area Motor drive line is shorted to ground Healing Condition If there is a continuity between the Motor drive line and ground line correct the wiring harness (wiring harness short to ground) 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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