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: 183 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. P0117-11: Engine Coolant Temperature Sensor Circuit Low – Circuit Short to Ground Overview: ISO Code P0117-11 Customer Symptom High Temperature warning lamp blinks, Cooling Fans runs continuously. Engine stalls when fault gets set. Fault Effects (On Vehicle) Cooling Fans runs continuously till next driving cycle, Calculated temperature value from a map is used for engine functionality. Lamp Status (If Any) MIL ON after 3 drive cycle Fault Detection Condition This fault gets detected at Ignition On, when the Coolant Temperature signal is short Circuited to Ground. Normal Operating Condition Coolant Temperature Sensor signal will be plausible with respect to Engine operating condition and Cooling Fans will be on only when, the Coolant temperature value is greater than a calibratable threshold. Probable Trouble Area Wiring Harness Connections / Sensor Healing Condition After 3 driving cycles, when the Ignition is ON. Fault present 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: The temperature sensing Circuit uses Thermistor that is sensitive to change in temperature. It has basically the NTC (Negative Temperature Coefficient) means as the temperature increases, the resistance decreases Preliminary Checks: 1) Loose/ Damaged Connections between Sensor and EMS ECU. 2) Check for back out of pins at both Sensor connector and ECU connector. 3) Check for damage of pins at both Sensor connector and ECU connector. 4) Check the continuity from Sensor connector pins to the ECU pins.