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: 98 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. P0039-29: Turbocharger Bypass Valve Control Circuit Range/Performance– Circuit Open Overview: ISO Code P0039-29 Customer Symptom Boost Control strategy will not be active Fault Effects (On Vehicle) Boost Control strategy will not be active, Bypass valve will be stuck closed. Lamp Status (If Any) MIL ON after 3 drive cycles. Fault Detection Condition This fault gets logged if the Turbo charger by pass valve control pin of EMS ECU is physically stuck. Normal Operating Condition Healthy wiring harness connections between EMS ECU and turbocharger bypass valve Probable Trouble Area Wiring Harness connections, By pass valve Healing Condition Ignition ON and after 3 driving cycles of fault rectification Fault permanent deletion:- 1. Clear DTC Command form Scan tool 2. Stack Over Flow. 3. 40 warm up cycles. 4. ECU Flashing. 5. ECU Power-Fail Component Details: Turbo Charger bypass valve is a solenoid valve, whose magnetic coil is energized to open the valve. Valve can be opened in any position between its 0% Opening to 100% Opening by controlling the magnetic coil energization. Preliminary Checks: 1) Loose/ Damaged Connections between bypass valve and EMS ECU. 2) Check for back out of pins at both bypass valve connector and ECU connector. 3) Check for damage of pins at both bypass valve connector and ECU connector. 4) Check the continuity bypass valve connector pins to the ECU pins. 5) Check whether the bypass valve is getting main relay power supply