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: 173 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. Stand alone diagnosis: TMAP Sensor is used to measure the temperature & pressure of the Intake Air @ Intake Manifold (Before Turbo). The piezo-resistive pressure Sensor element and a suitable Circuitry for signalamplification are integrated on a silicon chip. Themeasured pressure operates from above to the active side of the silicon diaphragm. Temperature Sensor is a NTC Element.The manifold air pressure Sensor is mounted on intake manifold plenum and the bolt tightened at specified torque. The T-MAP Sensor is a four pin peizo-resistance semiconductor device with a negative temperature coefficient. The T-MAP Sensor provides intake air pressure and temperature details to ECU, which then calculates the correct quantity of fuel to be injected to each cylinder. A DC signal voltage is produced by the Sensor, which gets excited due to varying manifold air pressure which is felt on semiconductor diaphragm. Diagnosis Use multimeter to check for signal voltage at pin1 and pin3. Supply voltage :- 5V DC. Signal Voltage : 0.4 V @ 10 kpa (absolute) 4.65 V @ 115 kpa (absolute) Connector details : 1. M2A2: Ground 2. M1A2: Temperature signal 3. M2E1: Supply 5V 4. M2C1: Pressure signal Use TATA diagnostic tool to check for 'Intake manifold pressure and Air temperature' values. Transfer Function of Pressure Sensor: Uout= (c1*pabs+c0).US Where, Uout = signal output voltage in V US = supply voltage in V pabs = absolute pressure in kPa c0 = -0.1/105 c1 = 0.85/105 kPa-1 Characteristics of Pressure Sensor: Characteristics of Pressure Sensor with Supply Voltage of 5 Volts