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: 352 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. P0236-9: Turbocharger Boost Sensor “A” Circuit Range/Performance – Component Failure Overview: ISO Code P0236-9 Customer Symptom Vehicle drivability will be poor Fault Effects (On Vehicle) Boost Control strategy will be inactive Lamp Status (If Any) MIL ON after 3 driving cycles Fault Detection Condition This fault gets logged if the Boost Pressure sensor module has some failure due to which it show improper behavior. Normal Operating Condition Boost pressure is plausible with respect to the Engine operating condition. Probable Trouble Area Wiring Harness Connections, Inlet Air Circuit Clogging, Sensor faulty, Turbo charger faulty, Waste gate valve Faulty, Dump valve faulty. Healing Condition After 3 driving cycles 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: Boost pressure Sensor consists of a silicon chip mounted inside a reference chamber. On one side of the chip is the reference chamber and on the other side is the pressure to be measured. The electrical resistance of the chip varies with the variation of pressure. This change in resistance alters the voltage signal. ECM interprets the voltage signal as pressure and any change in voltage signal as change in pressure. Preliminary Checks: 1. Inlet Air Circuit Clogging? 2. Waste gate valve faulty? 3. Turbo charger Faulty? 4. Loose/ Damaged Connections between Sensor and EMS ECU. 5. Check for back out of pins at both Sensor connector and ECU connector. 6. Check for damage of pins at both Sensor connector and ECU connector.