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: 359 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 the Inlet Air Circuit Clogged Rectify / Replace the Air inlet Circuit Go to Step 2 2 Is there any rust/oxidization observed on Sensor Terminals Clean the Rust or repair or replace Go to Step 3 3. Is there wiring harness electrical continuity between ECU pins 208, 218,210 & Boost pressure Sensor connector pins 1, 4, 3. Go to Step 4 Establish continuity by rectifying harness connections as per the Circuit schematic 4 Are there any pins damaged at Sensor/EMS ECU Connector Replace the connector or wiring harness Go to step 5 5 Are there any pins backed out from the Sensor/EMS ECU Connector Rectify/Replace Connectors Go to Step 6 6 Is Sensor Supply pin 210, Short Circuited to GND/Battery. Repair the harness as per the schematic Go to Step 7 7 Is Sensor Signal Pin 218, Short Circuited to Battery supply or ground?. Repair the harness as per the schematic Go to Step 8 8 Is Sensor physically Damaged Replace Sensor Go to Step 9 9 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. 1. Boost pressure value reads by the ECU is = Atmospheric pressure at ignition key is on. 2. Boost pressure value reads by the ECU is < Atmospheric pressure when the engine is at idle. 3. Boost pressure value reads by the ECU is > Atmospheric pressure when the engine is at fly-up.