`12 1 Author: Prashant Ghadigaonkar/ Pooja Jaiswal/ Samir Tikhe 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. Kangar 2.0 DTC Troubleshooting Data Version: 1.0 Date: 11-11-2021 P309F – 41 :- Error in checksum Calculation in-between MCU and VCU - general checksum failure Overview: ISO Code (If applicable) P309F – 41 Customer Symptom Vehicle will stop. Fault Effect (On Vehicle) Vehicle goes from D-N Mode and Vehicle Can’t be Cranked Lamp Status (If Any) HV Critical lamp on cluster glows. DTC Trigger Condition Checksum Value Calculation between MCU and VCU is different in 25ms Probable Trouble Area VCU or MCU software is not updated. Electromagnetic interference/Line damage Healing Condition Ignition On/Off Write up for the system:- E-drive is a three in one unit which consist of Electric motor, Motor Controller Unit and Gear- Box, Where this unit draws power from the High voltage battery and convert that electric power into kinetic energy which helps to rotate the vehicle. During braking vehicle kinetic energy convert in to electric energy.
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