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: 619 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. Is the Brake Switch setting proper? Go to step 2 Correct the setting as per the Brake switch TML drawing 2. Is there continuity exists between Main Brake switch pin X and EMS ECU pin 135 && Main brake switch pin X and battery supply. Go to step 3 Rectify the wiring harness connections as per the schematic 3. Is there continuity exists between Brake redundant switch pin X and EMS ECU pin 147 && redundant brake switch pin X and Ignition supply. Go to step 4 Rectify the wiring harness connections as per the schematic 4. Check whether EMS ECU pins 135 / 147 shorted to battery supply / Ground Go to step 5 Rectify the wiring harness connections as per the schematic 5 Are there any pins damaged at EMS ECU Connector Replace the connector or wiring harness Go to step 6 6 Are there any pins backed out from the EMS ECU Connector Rectify/Replace Connectors Go to Step 7 7 Is Brake switch connector damaged or pins got backed out. Rectify/Replace Connectors Go to step 8 8 If fault still persists, then replace brake switches and if fault still persists then replace EMS ECU. Follow the above procedure 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. Turn the Ignition On, press the brake pedal for 3 or 4 times and then check the DTC’s again. DTC shall not reappear.