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: 1400 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 / Sulphation observed on Battery Terminals Clean the Rust or repair. Go to Step 2 2. Is there wiring harness electrical continuity between ECUpins155,156 &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 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 Alternator functioning Go to Step 6 Repair / Replace 6 Are EMS ECU pins 155/156 Short Circuited to GND. Repair the harness as per the schematic Go to Step 7 7 Is Rectifiers in Alternator functioning properly? Repair / Replace Go to Step 8 8 Fault Still Persists? 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. Check Battery voltage parameter value.. it should be in range of 12.5 to 14.5 volts.