[4th GEN] IACV - Ohm Test

[OwnerCS]

1999 I-30

In OHM testing the IACV, following FSM section EC page 374, the current OHM readings are 40 as opposed to FSM spec at 30. I tested the good working 95 Maxima to get a baseline. The 95 Maxima readings are 29.8 to 30.

Just to verify, will a failing IACV have a higher OHM reading like 40?

I picked up another IACV from a 99 Maxima (pick-n-pull) along with the ECM and TCM to have as a spare. Both IACV units from the 99 models read 40 OHMs.

[loystock]

That is much higher than spec. The IACV response may be delayed or even erratic as commanded by ECU. Remember, the IACV is a stepper-motor driven valve with driver (power transistor) inside ECU. I've had a P1400 before (EGRC Solenoid Valve) causing rough starting. Spec for the solenoid is 30 ohms but my EGRC-SV has 32.5 ohms (2.5 ohms difference). I replaced it with an OEM part and the rough starting went away.