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: 895 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. Operating Principle: EMS ECU controls the input voltage of the DC Motor to control the throttle plate Opening. Throttle position Sensors provide the position of the throttle plate to EMS ECU to make it a closed loop control. Counter Clockwise Operation – Circuit and Position feedback: Standalone Diagnosis: 1. Connect variable power supply to the Throttle Actuator DC Motor pins XX and XX. Give 5V power supply to Throttle Position Sensor supply pins xx,xx and connect ground to Sensor ground pins xx, xx. 2. Vary the supply voltage from 0 to 5 Volts and check whether the Throttle plate is moving in counter clockwise direction. 3. Also measure the voltage at the Throttle position Sensor signal pins xx, xx. These voltage signals should vary according to the graph shown in above snapshot.