Gravitas/SAFARI/X451/NEXON FATC DTC Troubleshooting Data Version: 1.1 Date: 28-Apr-2021 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: 181 of 244 1) Battery Voltage is between 9 to 16V. Circuit Schematic Diagram:- Schematic shared separately in PDF. Component Location & Image:- NA Connector Location: -Behind the CCM ECU Body. Connector View & Information: Inspection Method: - Use multimeter check continuity pin 30 &battery pin. B1F48-14:- All HVAC & non-HVAC sensors Voltage reference pin- Circuit Short to ground or Open ISO Code B1F48- 14 Customer Symptom System is less responsive to user control and environmental conditions Fault Effects (On Vehicle) Non HVAC sensor input out of range Lamp Status (If Any) NA Fault Detection Condition If C2 - 14 of HVAC side connector to Ground or Open Normal Operating Condition FATC setting is updating properly as per user input. Probable Trouble Area HVAC connector wired wrong, Sensor connector wired wrong, harness wire shorted Healing Condition N/A +Vbat(pin 16) Power supply for FATC Control Head (pin 30)
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