NEXON 3.0 EV DTC Troubleshooting Document for VCU Version: 2.0 Date: 22-Sep-2023 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. P3034 – 12: - E-Drive ignition activation line - circuit short to battery Overview: ISO Code P3034- 12 Customer Symptom HV Critical Alert Tell-tale is glowing on the cluster Fault Effects (On Vehicle) The vehicle is drivable as per driver inputs. No effect on vehicle drive ability. E-drive control receives LV supply continuously. Lamp Status (If Any) HV critical lamp ON, on the cluster Fault Detection Condition MCU Ignition Wake Up short circuit to battery Normal Operating Condition Motor Control Unit receives LV supply when vehicle ignition is given Probable Trouble Area LV wiring Harness MCU LV connector VCU LV connector Healing Condition If DTC trigger condition is healed, DTC is present only in memory. Component Details: E drive MCU receives LV battery ignition signal from the VCU. Preliminary Checks: 1. Loose connection/pin backout of LV wiring harness between VCU and actuator MCU LV connector 2. Damage to LV wiring harness connections between VCU and actuator MCU LV connector Trouble Shooting: - 1. Remove the LV battery connections.
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