TATA BSVI Gasoline_Bifuel Program – EMS ECU Bosch DTC Troubleshooting Service Manual Version: 1.9 Date: 24-01-2022 Prepared By: Veer K. Singh / Prudhvi B Varma Checked By: Yeshwant Jadhav Approved By: Sanjeev M. Document Part No: 2921 02 xxx xxxx Page: 1470 of 1692 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. Check the continuity between the EMS ecu pin 224 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 4 Establish continuity by rectifying wiring harness connections as per the schematic. 4. Is the Injector connector pin 1 short Circuited to battery/Ground? Perform this test by keeping Ignition Off. Go to Step 5 Rectify Wiring Harness connections as per the schematic 5. Check whether the Injector pin 224 is Short Circuited to Ground Rectify Wiring Harness connections as per the schematic Go to step 6 6. Check whether any injector pins are backed out at ECU Connector or Injector connector Rectify the connections Go to Step 7 7. Is there any physical damage to Injector connector / ECU Connector Replace the respective connectors Go to step 8 8. 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.
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