Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 279 of 834 Copyright by TATA MOTORS Ltd. This document must not be used in any w ay, such as copying and redistributing to third parties, w ithout our consent Step 6 Check for any obstruction to the air flow in Engine cabin. Clear the obstructions Perform fan actuator test and check air flow in engine cabin Step 7 Perform coolant de-aeration. Warmup the engine above 90 deg C to make thermostat valve to open. Stop the engine and let it cool. Check the coolant level after cooling. Top up the coolant, if it less than the minimum marking in the coolant reservoir - Step 8 Allow Engine to Cool Down and Start the Engine - Associated Parameters: Parameter Label Description DID Monitoring Engine Coolant temperature The global engine coolant temperature FE1B Temperature should be above 80 deg C when vehicle is run for minimum of 15 mins Verification condition: Drive the vehicle in city and highway condition in engine warmed up condition for 20 mins. Component description: ECM detects engine coolant temperature via the engine coolant temperature sensor. The sensor modifies a voltage signal from ECM. The modified signal returns to ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases. A radiator cooling fan is device that can help regulate engine temperature and prevent the engine from overheating. The dual speed electric cooling fans are powered by the vehicle electrical system. These radiator fans use DC motors that are switched on and off by the engine control unit through the coolant temperature sensor input. Circuit Schematic Diagram: NA Component Location and Image:
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