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. P30B0 - 11: Regen Switch sensor input to VECU - circuit short to ground Overview: ISO Code P30B0 - 11 Customer Symptom Vehicle is operable, but regeneration level cannot be changed Fault Effects (On Vehicle) Vehicle is operable with default regeneration level Lamp Status (If Any) Service lamp ON Fault Detection Condition Short to GND is detected by the vehicle controller for regen switch is lesser than lower threshold value Normal Operating Condition Regen switch input is within the operating range and accordingly vehicle regeneration level is selected Probable Trouble Area Regen switch LV wiring Harness Powertrain VCU connector Healing Condition If DTC trigger condition is healed, DTC is present only in memory Component Details: Regen switch is used to change the regen level. Preliminary Checks: 1. Check for loose connection of LV wiring harness between VCU and regen switch 2. Check for damage to LV wiring harness connections between VCU and regen switch 3. Visually inspect regen switch for damage Trouble Shooting: - Remove the LV battery connections Step No. Description Check point If yes If No
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