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: 708 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 at Alternator Terminal Clean the Rust or repair Go to Step 2 2. Is there wiring harness electrical continuity between ECU pin 233 and Alternator Terminal - Go to Step 3 Establish continuity by rectifying harness connections as per the circuit schematic 3. Are there any pins damaged at Alternator Terminal to EMS ECU Connector Replace the connector or wiring harness Go to step 4 4 Are there any pins backed out from the Alternator Terminal EMS ECU Connector Rectify/Replace Connectors Go to Step 5 5 Is EMS ECU pin 233 Short circuited to ground Go to Step 6 Repair the harness as per the schematic 6 Is Alternator Functional? Go to Step 7 Replace Alternator 7 Fault Still Persists? Replace EMS ECU, if fault still persists then replace Alternator 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. Turn the Ignition ON, then Turn ON Head lamps, Wiper, Music System and observe whether the Alternator Duty ratio parameter is increasing by increasing electrical loads.