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: 268 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. Are Fuel Lines Blocked Remove the blockage Go to Step 2 2. Is Fuel Regulator operational Go to Step 3 Replace the Fuel Regulator 3 Are the Injectors Blocked Clear the blockage Go to Step 4 4 Are the Injectors leaking Replace the leaking Injector Go to Step 5 5 Is Injector time delay correct Go to step 6 Correct the timing delay through calibration 6 Is the Intake Air Circuit leaking Modify/Repair/Replace the leaking components Go to step 7 7 Perform IO test for throttle valve. Is test successful? Go to step 9 Go to step 8 8 Are there any faults related to throttle valve Rectify them by following their rectification procedure Go to step 9 9 Is throttle valve stuck Open? Replace throttle valve Go to step 10 10 Perform IO test for Fuel pump relay. Is test successful? Go to step 12 Go to step 11 11 Are there any faults related to fuel pump relay Rectify them by following their rectification procedure Go to step 12 12 Is fuel pump relay stuck closed Replace fuel pump relay Go to step 13 13 Is fuel pump faulty Replace fuel pump Go to step 14 7. If the fault still persists Replace the Lambda Sensor, IF fault still persists then replace EMS ecu Repeat the procedure for confirmation DTC’s confirmation:- After rectification, ensure the following points by referring engine parameters using TML diagnostic tool before handing over to customer. Recheck the DTC using TML diagnostic tool, fault shall not reappear.