SYSTEM
VALVE>
Inspection of
Components
IDLE SPEED CONTROL MOTOR (DC MOTOR)
speed control
m o t o r
l
-
speed
control
Harness side
connector
1989 models>
Enoine control module
Component side
connector
1
2
speed
control
motor
Engine control module connector
OPERATION
l
The volume of intake air during idling is
ulated by the opening and closing of the throttle
valve, caused by expansion and contraction of
the servo plunger.
l
The servo plunger expands or contracts in
accordance with whether the DC motor (located
within the idle speed control motor) is driven in
the forward or reverse direction.
l
The DC motor is driven in either the forward or
reverse direction according to the direction of
switching of the current flow of the
activation within the engine control module.
TROUBLESHOOTING HINTS
If there is unstable idling or engine stalling, etc., and
it is difficult to presume the cause of the problem,
switch ON the ignition switch and leave as is for 15
seconds or longer; then disconnect the servo
connector.
HARNESS INSPECTION
The cause of the problem can then be easily
presumed by checking in this condition.
Note that, if necessary, the engine speed adjusting
screw should be turned to adjust the engine rpm.
connector
Engine control
module harness
side connector
I
TSB Revision
Check
for an open-circuit, or a
circuit to ground between the engine
Содержание 1989 Galant
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