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. P3047 - 09: - MCU contactor weld - Component Failures Overview: ISO Code P3047 - 09 Customer Symptom Vehicle is operable with reduced power with limp home telltale indication blinking on cluster. Charging will be disabled. HV Critical Alert Tell-tale is ON Fault Effects (On Vehicle) Vehicle speed will be limited to 50 kmph. Air conditioning and charging are disabled. E-drive always received HV voltage at its terminals. Lamp Status (If Any) HV Critical Alert telltale ON EV Limp home telltale blinking on Cluster Fault Detection Condition MCU receives HV voltage even when contactor is open (during charging). Normal Operating Condition E drive contactor opens and closes as per VCU request. Probable Trouble Areas LV wiring Harness PDU LV connector Inside PDU Powertrain VCU connector Healing Condition If DTC trigger condition is healed, DTC is present only in memory. However, cluster indication will be ON till one drive cycle of vehicle, until DTC is cleared using tester tool. Component Details:
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