`95 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 P197101:- DCDC input voltage detection circuit fault Overview: ISO Code (If applicable) P197101 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 1. Input DC voltage≥475V, last for 2 seconds Or Input DC voltage≤10V, last for 2 seconds 2. Receive DCDC enable command = Enable All of the conditions are true. Normal Operating Condition When DCDC Enable command equal 0x1(Enable): Input DC voltage is in [200V,450V] Probable Trouble Area 1. The DC/DC internal input voltage detection circuit is open; 2. The DC/DC internal input voltage detection circuit is shortcircuited; 3. The voltage sensor in the DC/DC internal input voltage detection loop or the components in the loop are damaged. 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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