3000GT Convertible AWD V6-2972cc 3.0L DOHC Turbo (1995)
INSPECTION USING SCAN TOOL
HARNESS INSPECTION PROCEDURE
Using Oscilloscope
(1) Connect the probe to each oscilloscope pick-up point as shown in the circuit diagram.
(2) Start the engine.
(3) When the air conditioning switch is turned on, the idling speed increases to operate the idle speed control. Check the instantaneous waveform.
NOTE:
Keep in mind that the waveform can be observed only when idle speed control is in operation.
TROUBLESHOOTING HINTS
Hint 1:If the stepper motor step increases to 100 to 120 steps or decreases to 0 step, faulty stepper motor or open circuit in the harness is suspected.
