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: 470 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 ECU pins237,238 & Knock Sensor connector pins 1,2. 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 Negative pin 238 SC to Ground Go to Step 6 Repair the harness as per the schematic 6 Is Sensor Positive Pin 237, Short Circuited to GND Repair the harness as per the schematic Go to Step 7 7 Is Sensor physically Damaged Check the resistance between two leads and it should be between 4 – 10 Mega Ohms . If found faulty then replace the Knock Sensor Go to Step 8 8 Fault Still Persists? Replace 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. Recheck the fault, fault shall not reappear.