Revotron 1.2T
161
Connector View :
Component Specification :
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.
Sensor Stand alone Diagnosis :
Measure the resistance across the Dump
valve terminals at room temperature; it should
be 13.2 +/- 0.5 ohms.
iv. Purge Control Valve :
Component Details :
Purge Valve is a solenoid valve (Variable
position), its opening is controlled by
controlling the field current of the magnetic
coil.
Component Location :
Preliminary Checks :
1. Loose or damaged connections between
actuator and EMS ECU.
2. Check for back out of pins at both
actuator and EMS ECU connector.
3. Check for damage of connectors at both
actuator and EMS ECU end.
4. Check whether the actuator is stuck open/
closed - Mechanical failure.
