`121 Author: Navya Krishnan Copyright © TATA MOTORS Ltd. This document must not be used in anyway, such as copying and redistributing to third parties, without the consent of author. Kanger 3.0 DTC Troubleshooting Data Version: 1.0 Date: 24-July-2023 P19D208:-DCDC Low Temperature Shutdown Overview: ISO Code (If applicable) P19D208 Customer Symptom NA Fault Effect (On Vehicle) DCDC Converter is not charging LV battery. Vehicle stops when LV battery is completely drained Lamp Status (If Any) NA DTC Detection Condition This DTC gets logged if DCDC Detect Internal Sensor Temperature < -45 ℃ Normal Operating Condition DCDC Detect Internal Sensor Temperature > -35 ℃ Probable Trouble Area 1. Low ambient temperature 2. DCDC internal sensor failure 3. Low coolant level Healing Condition Ignition OFF wait till VCU sleeps & Ignition ON Write up for the related system:- The component 3in1( DC-DC Converter, On-Board Charger and Power distribution unit)is used to charge LV battery, HV battery and act as junction box between HV power train components ( PTC, e-Compressor, HV battery, Fast Charging and MCU) Pre-Check Points: a) Check the coolant level b) Check the coolant system proper connection and make sure there is no leakage c) Check for the LV connector pins damage
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