Gravitas FATC Gen 3 DTC Troubleshooting Data Version: 1.0 Date: 15-July-2023 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: 86 of 301 Connector Location: -HVAC kit Connector View & Information: - PIN Assignment Inspection Method: - 1) If there is no continuity between the Blower control circuit & ECU connector then correct the wiring harness B1F5F-09:- Rear blower input signal failure-Component failure ISO Code B1F5F - 09 Customer Symptom Rear Blower will be OFF. Blower Functionality disabled Fault Effects (On Vehicle) Rear blower will not work. Lamp Status (If Any) Rear blower should be turned off. Fault Detection Condition Rear blower input signal failure-component failure Normal Operating Condition With the Blower control circuit connected to the harness and with Ignition ON, check the voltage between pin no 1 of blue connector & ground of the Connector. The voltage range should be in between 1.73 to 8.71 V. Probable Trouble Area CCM receiving same active high on all rear blower digital input signals Healing Condition 1) If there is no continuity between the Blower control circuit & ECU connector then correct the wiring harness Component Details: The blower is used for moving air from either an outside source--referred to as vented air--or from cabin air past the heater core or air conditioning evaporator. In doing so, it causes a heat transfer either to the inside of the car or from the inside to the outside. Preliminary Checks:
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