UHZT

Hello my friends.

Hello my friends.
I read:
"FSM procedures for checking the IAC:
(1) Warm the car up to normal operating temperature. Unplug electrical connector to IAC. Engine should immediately stall or idle rpms should drop almost to zero (kinda like what your car does with the IAC plugged in). If engine rpm increases or does not change much, proceed to step 2. [I betcha that unplugging your IAC makes little or no difference.]
(2) Unplug negative battery cable and IAC. Measure the resistance between the 2 eletrical terminals on the IAC. Resistance should be 7.7-9.3 ohms at room temperature. If not as specified, replace IAC.
(3) If step 2 checks out OK, inspect for open or short circuit between the IAC harness connector and terminals 54 and 83 on the ECU."

I have some questions. I HAVE A PROTEGE 2000 1.6L
I think it may be dangerous to unplug electrical conector of the IAC with engine ON. Maybe a spike or statics can damage the element or the ECU. Am i rigth or i can disconect it without any problem.
How can i perform the test about step (3)???
I understand that an open circuit or a short to gnd that would be a problem? Am i rigth?


Thanks in advance
UHZT

carguycw

(1) If pulling the connector with the engine running was dangerous to the car's electrical system, the factory service manual (FSM) wouldn't recommend this procedure.
(2) You need a multitester or multimeter, preferably one with an audible continuity signal, and an ECU pinout diagram (do a search, someone may have posted this). Each IAC pin should only have continuity to only one of the specified ECU terminals, and no continuity to ground.

UHZT

Thanks Chris.