Mitsubishi Stealth 1994 Import Service Manual page 681

MULTIPORT FUEL IINJECTION -
ACTIVE EXHAUST CONTROL 1JNlT <Turbo>
Engine control module connector
OPERATION
Muffler noise is controlled by opening and closing the valve provided inside the main muffler.
l
The valve is opened or closed by turning the DC motor in the normal or reverse direction.
l
The DC motor is driven in the normal or reverse direction by changing the direction of power flow by the
l
motor driving IC in the active exhaust control unit.
The active exhaust control module opens and closes the valve when it receives the signal produced by the
l
engine control unit.
HARNESS INSPECTION
ACTUATOR INSPECTION
Refer to GROUP 11.
On-Vehicle Inspection of MFI Components
DC motor for
valve drive
1
Active A
exhaust
control
unit
DC motor
Measure the input voltage of engine
control module.
Engine control module connector:
l
Disconnected
Ignition switch: ON
l
M
2
A
connector