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: 145 of 202 B1F50-15:-Control Module output power for FATC Control Head- Circuit Short to battery and Open ISO Code B1F50- 15 Customer Symptom CCH (LED etc.) goes OFF Fault Effects (On Vehicle) CCH shall not be operable Lamp Status (If Any) CCH control panel shall be non-operational Fault Detection Condition If C1 - 30 of vehicle side connector to battery or Open Normal Operating Condition All CCH inputs shall be processed by CCM Probable Trouble Area HVAC connector wired wrong, Harness wire broken, Connector pin backout, Damaged crimp, fuse blown Healing Condition If there is a continuity between the C1 - 30 of vehicle side connector and battery line correct the wiring harness (wiring harness short to battery) Component Details: N/A Preliminary Checks: 1. Voltage at the battery terminals should be greater than 9V at the Ignition ON Condition. 2. FATC power supply connector should have greater than 9V for normal functionality of FATC. 3. Check battery cable and FATC connector terminals for damage. 4. Check CCM for pin bend/damage.
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