`10 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 P309E – 16 :- MCU 12V Control Supply - circuit voltage below threshold Overview: ISO Code (If applicable) P309E-16 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 This DTC is logged if the LV voltage to the E-drive is less than 8V. Probable Trouble Area Under voltage: DC-DC converter is giving less voltage i.e. <8V at the output. Voltage sensor has failed. External power failure/Internal voltage detection circuit failure. 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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