TIAGO TIGOR BSVI - SERVICE MANUAL - DTC 24-12-2021

TATA BSVI Gasoline Program – EMS ECU Bosch DTC Troubleshooting Service Manual Version: 1.2 Date: 18-12-2019 Prepared By: Sunita Mandlik Checked By: Yeshwant Jadhav Approved By: Satish Kumar Document Part No: 2921 02 xxx xxxx Page: 1054 of 1498 Copyright © TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author. P3030-1: Sticky Main Relay or Short to Ground in Control Circuit – General Electrical Failure Overview: ISO Code P3030-1 Customer Symptom 1. In long term ECU can be damaged. 2. Battery may drain completely after overnight soaking. Fault Effects (On Vehicle) 1. ECU will not be switched off even after postdrive is completed or after ignition is off 2..In long term ECU can be damaged 3. Battery will be drained soon Lamp Status (If Any) No Lamp Indication Fault Detection Condition This fault gets logged if the Main relay control pin of EMS ECU is short circuited to Supply Line (Battery) Normal Operating Condition Healthy wiring harness connections between Main Relay and EMS ECU Probable Trouble Area Wiring Harness Connections, Main Relay Pin Connection, Main Relay Condition Healing Condition Ignition On or Engine After Run & after 1 drive cycles of fault rectification. Fault permanent Deletion 1. Clear DTC Command form Scan tool 2. Stack Over Flow. 3. 40 warm up cycles. 4. ECU Flashing. 5. ECU Power-Fail Component Details: Majority of the EMS components gets the power supply after the Main Relay is switched on by EMS ECU. Preliminary Checks: 1. Check relay control pin 2. Check supply line from battery to ECU 3. Check main relay is in good condition 4. Check whether Main Relay is short circuit to UBAT