3000GT AWD V6-2972cc 3.0L DOHC Turbo 24 Valve (1996)
Hint 2:
If the idle air control motor harness and individual part checked good but the stepper motor steps are out of specification, the following
faults are suspected.
(1) Poorly adjusted reference idle speed
(2) Deposit on the throttle valve
(3) Air leaking into the intake manifold through gasket gap
(4) Loose EGR valve seat
(5) Poor combustion in the cylinder (faulty ignition plug, ignition coil, injector, low compression pressure, etc.)
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 connect the special tool (test harness).
(2) Measure the resistance between terminal (2) (white clip of the special tool) and either terminal (1) (red clip) or terminal (3) (blue clip) of the
connector at the idle air control motor side.
Standard value: 28-33 Ohms at 2O°C (68°F)
(3) Measure the resistance between terminal (5) (green clip of the special tool) and either terminal (6) (yellow clip) or terminal (4) (black clip) of the
connector at the idle air control motor side.
Standard value: 28-33 Ohms at 2O°C (68°F)
Operational Check
(1) Remove the throttle body.
