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: 921 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 there any rust/oxidization observed on Sensor Terminals Clean the Rust or repair or replace Go to Step 2 2. Is there wiring harness electrical continuity between ECUpins 223,203, 220 &Throttle Position Sensor connector pins 3,6,5. Go to Step 3 Establish continuity by rectifying harness connections as per the Circuit schematic 3. Are there any pins damaged at Sensor/EMS ECU Connector Replace the connector or wiring harness Go to step 4 4 Are there any pins backed out from the Sensor/EMS ECU Connector Rectify/Replace Connectors Go to Step 5 5 Is Sensor Supply Pin 223 Short Circuited to Battery/GND or Open and throttle actuator control motor Pin 251 or Pin 252 gets short Circuit to ground? Repair the harness as per the schematic Go to step 6 6 Is Sensor Signal Pin 203/220 Short Circuited to battery/GND or Open Circuited? Repair the harness as per the schematic Go to Step 7 7 Is Sensor physically Damaged Replace Sensor Go to Step 8 8 Fault Still Persists? Replcae Sensor and then Fault still persists then Replace EMS ECU Follow the steps again for reconfirmation DTC’s confirmation:- After rectification, ensure the following points by referring engine parameters using TML diagnostic tool before handing over to customer. Pls. perform the Throttle Actuator IO Control test. IF test is successful then the fault rectification is confirmed.