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: 288 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 Check the Injector Connector for any damage Replace connector Go to step 2 2. Is there any dirt or Rust on Connector Remove the connector and clean it and refit it tightly Go to Step 3 3 Perform the Injector cylinder 3 actuator test. Is the test successful Go to step 4 Some problem in Wiring harness connections 4. Check the continuity between the EMS ecu pin 245 and connector pin 1. Check the continuity between the injector connector pin 2 and EMS main relay supply. Is continuity test successful Go to step 5 Establish continuity by rectifying wiring harness connections as per the schematic. 5. Is the Injector connector pin 1 short Circuited to battery/Ground. Perform this test by keeping Ignition Off. Go to Step 6 Rectify Wiring Harness connections as per the schematic 6. Check whether the Injector LSD pin 245 is Open Circuited. Rectify Wiring Harness connections as per the schematic Go to step 7 7 Is the resistance between the Injector 3 and EMS ecu less than 1 ohm? Go to Step 8 Replace the Injector 3 wiring Hanress 8. Is the resistance across the injector terminals less than 12.25 ohms? Go to Step 9 Replace the Injector of cylinder 3 9. Check whether any injector pins are backed out at ECU Connector or Injector connector Rectify the connections Go to Step 10 10 Is there any physical damage to Injector connector / ECU Connector Replace the respective connectors Go to step 11 11 If the fault still persists Replace the EMS ecu Repeat the above procedure 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. Perform the Injector of cylinder 3 actuator test. Test result should be successful. 2. Check the resistance across the injector of cylinder 3, it should be less than 12.25 ohms. 3. Remove the injector connector and check the wiring harness resistance between the EMS ecu and the connector, it should be less than 1 ohm.