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. P3036 - 12: - Power Train Main Relay activation line - circuit short to battery Overview: ISO Code P3036-12 Customer Symptom Vehicle is not operable. HV Critical Alert Tell-tale is seen blinking on cluster. Charging will be disabled. Fault Effects (On Vehicle) Vehicle will not be driveable. If vehicle is in running condition, it will go from Drive to Neutral. Air conditioning and charging will be disabled. Vehicle will not crank in the next Ignition cycle if this error is in confirmed state as no powertrain component will receive Keep alive supply.VCU pin to power train main relay is short to battery. Lamp Status (If Any) HV critical error indication blinking on Cluster Fault Detection Condition As per Supplier software, When short circuit to battery at VCU pin of powertrain main relay Normal Operating Condition When the VCU is ON, the power train relay will be supply signal to the loads through a relay. Probable Trouble Area LV wiring connection Intermediate connector Powertrain VCU connector Healing Condition If DTC trigger condition is healed, DTC is present only in memory. Component Details: The power train relay operates whenever the ECU is ON. It is used for powering up the LV loads through a VCU main relay. Preliminary Checks: Check wiring connections to the relay Physically inspect the relay for damage Trouble Shooting: - 1. Remove the LV battery connections. Step No. Description Check point If Yes If No
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