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Nexon Gasoline – EMS ECU Bosch
DTC Troubleshooting Manual
Version: 0.1
Date: 26-08-2017
Prepared By: Sunu S Babu/Yogesh Jadhav
Checked By: Yeshwant Jadhav
Approved By: Satish Kumar
Document Part No: 2921 02 224 A1736
Page: 363 of 1203
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.
Boost PressureSensor:
Boost Pressure Sensor is used to measure the pressure of the Intake Air @ Intake Manifold (
After 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.
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
Stand Alone Diagnosis of Sensor:
1. Give 5V Power Supply to the Sensor Supply pin and Ground to the Sensor Ground Pin
2. Keep the Sensor in a pressurized environment of 50 bar.
3. Measure the Voltage between the Sensor pressure Signal Pin and Ground, it should be 2.1 Volts approx.
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)