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. P301F - 13: - PDU HVIL Sense PWM - circuit open Overview: ISO Code P301F:13 Customer Symptom HV Critical Alert Tell-tale is seen blinking on cluster. Charging will be disabled. Fault Effects (On Vehicle) Vehicle will not be driveable and will go from Drive to Neutral. Air conditioning and charging will be disabled. Vehicle will not be allowed to crank in the next Ignition cycle if the fault is active. Lamp Status (If Any) HV critical lamp Blinking on Cluster Fault Detection Condition PDU HVIL PWM signal is not detected by VCU when PDU cover is closed all vehicle high voltage connections are intact and the LV service disconnect is also engaged. Normal Operating Condition During normal operating condition VCU senses PWM signal on pin C776B-50 Probable Trouble Area LV wiring Harness, PDU LV connector, Inside PDU, Powertrain VCU connector Healing Condition After rectification of fault, turn ignition OFF. Lock the vehicle and allow VECU to go to sleep. Ensure that no door is open and Vehicle key is not in vicinity of vehicle (If vehicle is not locked/ door is open, VECU will not go to sleep) Wait for 5 min and then turn ignition ON for further check. VECU sleep cycle is important to clear this critical fault from VECU memory Component Details: HVIL PWM signal sense detects if HV and LV connectors are fitted to PDU and PDU cover is not open. Preliminary Checks:
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