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: 1015 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. Trouble Shooting:- Step Checks IF YES IF NO 1. Are Relay Contacts weld / Stuck Open? Replace the Relay Go to Step 2 2. Is there wiring harness electrical continuity between ECU pin 211 & Starter relay coil pin X&& between the Main Relay supply and the relay Coil pin X. Also check continuity between the Starter Relay contact pin to Starter Relay-2 contact pin X&& Starter Relay contact pin X and Battery supply. Go to Step 3 Establish continuity by rectifying harness connections as per the Circuit schematic 3. Are there any pins damaged at EMS ecu Connector Replace the connector or wiring harness Go to step 4 4 Are there any pins backed out from the EMS ecu Connector Rectify/Replace Connectors Go to Step 5 5 Is relay getting Supply at its pin Go to Step 6 Repair the harness as per the schematic 6 Is Starter Relay-2 control Pin 211, Short Circuited to GND/Battery Repair the harness as per the schematic Go to Step 7 7 Is there DTC P3005-13 also present Follow its rectification procedure and rectify this fault Go to step 8 8 Fault Still Persists? Replace relay and then if Fault still persists then Replace EMS ecu Follow the steps again for reconfirmation DTC’s confirmation:- After rectification, ensure the following points by referring engine parameters using TML diagnostic tool before handing over to customer. 1. Crank the vehicle, if Vehicle starts then confirm that fault got rectified.