NEXON 2.0 EV DTC Troubleshooting Document for VCU Version: 1.0 draft Date: 31-Jan-2022 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. P3041 - 68: - VECU received BMS derate flag CAN Signal from BMS – event information Overview: ISO Code P3041 – 68 Customer Symptom Vehicle is operable with reduced power Fault Effects (On Vehicle) Vehicle will be drivable. Vehicle is drivable with reduced performance as per HV battery derating Lamp Status (If Any) Limp home lamp blinking Fault Detection Condition VECU has derate flag as received on CAN signal by BMS Normal Operating Condition Vehicle can be drivable with normal performance Probable Trouble Area HV Battery pack, HV battery LV and HV connectors, HV and LV wiring harness connected to HV battery Healing Condition NA Component details: HV battery is used to drive the power train components. When HV battery derate flag is received to VECU from BMS as a CAN signal, limp home mode of vehicle is activated. Limp home mode will be active till Derate flag is received from BMS to VECU. Preliminary Checks: NA Troubleshooting: - Check the VECU parameter value for HV battery variant related vehicle parameter as per below table VECU Parameter Name Expected Value Powertrain Variant Configuration 0 – AIO BMS; Refer table 1. 1 – Gen3 BMS; Refer table 2. 1. Keep the vehicle in Ignition On
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