`101 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 P199E98:- DCDC over Temperature shutdown Overview: ISO Code (If applicable) P199E98 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 ≥122℃, last for 1000ms Normal Operating Condition DCDC Internal Mos temperature≤107℃ 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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