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: 527 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 there any rust/oxidization observed on Ignition Coil A connector terminals? Clean the Rust or repair or replace Go to Step 2 2. Is there wiring harness electrical continuity between ECUpins 256 and Ignition Coil A connector pin. Is there continuity between Ignition coil A connector pin Vb and Main relay supply. Go to Step 3 Establish continuity by rectifying harness connections as per the Circuit schematic 3. Are there any pins damaged at Ignition Coil A/EMS ECU Connector Replace the connector or wiring harness Go to step 4 4 Are there any pins backed out from the Ignition Coil A /EMS ECU Connector Rectify/Replace Connectors Go to Step 5 5 Is EMS ECU Ignition Signal Pin 256 is Open Circuited? Repair the harness as per the schematic Go to Step 6 6 Is Ignition Coil A / HT Cables physically Damaged Replace HT Cables or Ignition coil Go to Step 7 7 Fault still persists? Replace Ignition Coil, If fault still persists then replace EMS ECU Repeat the above procedure for reconfirmation. DTC’s confirmation:- Recheck the fault, fault shall not reappear.