`42 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. Kanger2.0 DTC Troubleshooting Data Version: 1.0 Date: 12-feb-2022 P197D13:- MCU interlock signal detection circuit fault Overview: ISO Code (If applicable) P197D13 Customer Symptom NA Fault Effect (On Vehicle) Vehicle not able to crank, OBC not charging HV battery Lamp Status (If Any) HV critical lamp blinking (while cranking vehicle) DTC Detection Condition This DTC gets logged if Interlock signal detection circuit is abnormal for 1000ms Normal Operating Condition MCU Connector properly connected Probable Trouble Area 1) Loose connection of MCU connector 2) HVIL pin damage ( 3in1 side connector and /or harness side connector) 3)Oxidation/carbon formation over HVIL pins Healing Condition 1 Switch off the vehicle 2 Remove and reconnect the MCU connector Write up for the 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 for MCU Connector damage b) Check for loose connection of MCU connector and reconnect properly in case of loose connection. c) Check for HVIL pin back out (pin n. 2) in signal connector
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