69
123
ElEctrical componEnts
124
125
Exhaust Gas Recirculation Valve (EGR Valve)
• The EGR valve is used to mix cooled exhaust gases
with intake air to lower emissions and noise.
• The EGR valve is stepper motor controlled
• The valve is powered in both the open and close directions.
Turbocharger Actuator
• The turbocharger actuator is an electronic motor
that controls the position of the vanes inside of the
high pressure turbocharger’s turbine housing.
• The turbocharger actuator is mounted directly to the
high pressure turbo and is connected to the vanes
inside the turbine housing by a control arm.
Throttle Body
• The throttle body is operated by a stepper
motor controlled by the ECM and assists with
the exhaust aftertreatment system.
Turbocharger
Actuator
Control Arm
Throttle Body