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: 272 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 fuel regulator stuck Open Replace fuel regulator Go to step 2 2 Perform the IO test for Fuel pump relay. Is test successful? Go to Step 4 Go to step 3 3 Are there any faults related to Fuel pump relay Rectify them by following their rectification procedure Go to step 4 4 Is Fuel pump relay stuck Open Replace Fuel pump relay Go to step 5 5 Is Injector time delay correct Go to step 6 Correct the timing delay through calibration 6 Perform the IO test for Throttle Valve. Is test successful? Go to step 8 Go to step 7 7 Are there any faults related to Throttle valve Rectify them by following their rectification procedure Go to step 8 8 Is throttle valve stuck closed Replace throttle valve Go to step 9 9 If the fault still persists Replace the lambda Sensor, if the 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 fault with TML diagnostic tool and confirm that fault hasn’t re appear.