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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: 78 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.
Component Details:
Dump Valve
A
dump valve
is a pressure release system present in most turbocharged engines. Its purpose is to prevent
compressor surge, and reduce wear on the turbocharger and engine. Dump valves relieve the damaging effects of
compressor "surge loading" by allowing the compressed air to vent to the atmosphere, making a distinct hissing
sound, or re-circulate into the intake upstream of the compressor inlet.
Dump Valve is controlled by EMS ecu by a PWM signal.
Stand Alone Diagnosis:
Measure the resistance across the Dump valve terminals at room temperature; it should be 13.2 +/- 0.5 ohms.