Mitsubishi 1989-1993 GALANT Service Manual page 442

FUEL SYSTEM <DOHC>
HARNESS INSPECTION
connector
connector
the power supply
Measure
the idle air control motor.
. e Idle air control motor connec-
tor: Disconnected
. Ignition switch: ON
Check for an open-circuit, or a short-
circuit to ground, between the engine
control module and idle air control
motor.
. Engine control module connec-
tor: Disconnected
tor: Disconnected
harness
side connw&
ACTUATOR INSPECTION
Checking the Operation Sound
(1) Check that the operation sound of the stepper motor can
be heard after the ignition is switched ON (but without
starting the motor).
(2) If the operation sound cannot be heard, check the stepper
motor's activation circuit.
If the circuit is normal, it is probable that there is a
malfunction of the stepper motor or of the engine control
module.
Checking the Coil Resistance
(1) Disconnect the idle air control motor connector and con-
nect the special tool (Test harness).
(2) Measure the resistance between terminal @ (white clip of
the special tool) and either terminal @ (red clip) or terminal
Standard value: 28-33 & at 20°C (68°F)
(3) Measure the resistance between terminal @ (green clip of
the special tool) and either terminal @ (yellow clip) or ter-
minal @ (black clip) of the connector at the idle air control
motor side.
Standard value: 28-33 51 at 20°C (68°F)
TSB Revision
of
harness.