I need some help with an issue that I've been facing for some time now. The car in question is an 03 Corolla that has a 1nz-fe swapped into it. Now the issue is that with the AC turned on, the idle speed does not increase as it should. Neither does it increase when the steering wheel has been turned to maximum or when depressing the brake pedal at idle. I've tried 3 different throttle bodies with the same results.
However, at cold start, the idle goes up perfectly the way it should. I've taken apart an idle control valve from one of the throttle bodies and connected it stand alone with the icav connector to see if it moves with the ac on, it doesnt.
I've checked the continuity at all three wires of the connector and its fine. The middle one gets +B, the left one ground, and the right one signal from the ecu.
I've got a 2nz-fe in my charade and I've compared the voltages with it. At idle, it has the same voltages as the 1nz but when the brake pedal is pressed or the steering is turned to the maximum, the voltage on the third pin in the icav connector (the one controlled by the ecu) drops from around 6.9v to 6.2v and the idle goes up the way it should whereas, in the corolla, it stays at 6.7v without an increase in the idle.
I'm attaching a couple of videos to show you what I mean. The first one is of the charade and the second one of the corolla. The second video will also show the difference with the AC running towards the end.
Any insight on this issue would be highly appreciated. Thanks.
@xulfiqar and @ser_gtr Please help me out here. Thanks.