`130 Author: Navya Krishnan/Satyajit 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 2.0 DTC Troubleshooting Data Version: 1.0 Date: 15-Feb-2022 P199E48:- DCDC over Temperature deration Overview: ISO Code (If applicable) P199E48 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 internal Mos Temperature ≥ 112℃ Normal Operating Condition DCDC internal Mos Temperature < 112℃ Probable Trouble Area 1. The DC/DC cooling system is abnormal, such as the fan of the air cooling system is not working or the water cooling system is working abnormally 2. The DC/DC internal temperature detection circuit is abnormal. 3. Vehicle water circulation system failure 4. High coolant inlet temperature 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)
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