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: 259 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. Component Specification:- Sensor Stand alone Diagnosis:- The lambda Sensor is mounted on the closed couple catcon. The lambda Sensor has a four pin connector with a special ceramic body and gas permeable platinum electrodes on the surface. When the ceramic body is exposed to temperature 350 0 C, oxygen in the air diffuses into ceramic body. Depending on the porosity electrodes which are exposed to gas having varied level of oxygen. The lambda Sensor provides air/fuel ratio signal in mili volts to ECU as a function of varying air/fuel ratio. At 350 0 C, Lambda = 0.97-800 mV ± 55 mV(Rich mixture) Lambda = 1.1-50 mV ± 30 mV (Lean mixture) Diagnosis:- Connector details Terminal 1 :- 12 V Supply Terminal 2 :- ECU pin number M1E2 (Heater) Terminal 3 :- ECU pin number M2B3 (-ve) Terminal 4 :- ECU pin number M2A3 (+ve) Use TATA diagnosis tool to check for : Signal voltage-> than 0.5V or < than 0.4V Switching frequency-> than 0.2 Hz Use multimeter to check the heater function by measuring the heater resistance. Heater resistance at room temperature – 90 ohms Supply voltage-5V DC Check the signal voltage (Between pin number 2 and 3) Signal Voltage-0.68 ± 0.25V DC- at idle position Signal Voltage-04.25 ± 0.45V DC – at WOT position Lifetime of the Sensor:- The technical development of the Sensor is aligned to a service life of160.000 km and a maximum life time of 10 years.A Sensor with the protection tube variation is designedfor a service life of 250.000 km and a maximum life time of 15 years. Temperature dependant Heater Resistance plot:-