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: 151 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. P0108-15: Manifold Absolute Pressure Circuit High– Circuit Short to Battery or Open Circuit Overview: ISO Code P0108-15 Customer Symptom No Apprehensive feeling in vehicle running condition Fault Effects (On Vehicle) Vehicle starts with rich Air Fuel Ratio, No altitude adaptation, Sensor& EMS ECU might get damaged. Calculated Secondary Charge (Based on Throttle angle and Engine speed) will drive the engine. Lamp Status (If Any) MIL ON after 3 Drive Cycles Fault Detection Condition This fault gets logged if the TMAP Sensor Pressure signal is Short Circuited to battery or Open Circuited. Normal Operating Condition TMAP Sensor Pressure signal is plausible with respect to the Engine operating condition. Probable Trouble Area Wiring Harness Connections, Inlet Air Circuit Clogging, Sensor. Healing Condition Ignition ON and after 3 Driving Cycles Fault parmanent 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: TMAPSensor 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. The temperature Sensor element is a NTC resistor. Preliminary Checks: 1. Inlet Air Circuit Clogging. 2. Loose/ Damaged Connections between Sensor and EMS ECU. 3. Check for back out of pins at both Sensor connector and ECU connector. 4. Check for damage of pins at both Sensor connector and ECU connector.