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What is the voltage going into the idle airtake control valve supposed to be?

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: idle air control valve


Posted on May 10, 2010

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SOURCE: my 99 sephia idle low

could be vacum line leak or leak elswhere

Posted on Nov 28, 2010

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SOURCE: 2003 toyota corolla, shakes in the morning, stops shaking after it gets hot. I clean the idle control valve, the voltage signal from computer to the idle control valve is 5.1v.What should it be?

Have you done tune up? fuel filter?

Posted on Mar 16, 2017

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Which fuses would affect my idle control valve and what voltage should the wire harness show it has 4 wires.2000 dodge durango 5.2 engine

There is no one fuse that powers the idle speed control valve (AKA Air Bypass Valve). It receives its power from the electronic engine control system (known as reference) and that is controlled by the computer depending on the idle load on the engine the voltage varies. So if the system reference voltage was lost then no part of the engine control system would function.

Aug 17, 2016 | Dodge Cars & Trucks

2 Answers

Idle speed too low at stop

Hi Rich what make model an year vehicle ? Most vehicles have a IAC valve or motor - idle air control , There is a passage in the throttle body an this valve opens an closes this passage allowing more air past the throttle plate raising the idle ! This passage gets plugged by carbon an needs cleaning to restore the idle back ! Idle Air Control Valve How to clean throttle body and Idle air control valve iac There is no means for idle adjustment , the engine PCM controls It !

Apr 03, 2015 | Cars & Trucks

2 Answers

My 98 dodge ram 1500 (5.9L) recently had a voltage issue so i had the alt. rebuilt and since then i still have a voltage issue and also now have an idle issue. i've replace the plugs and wires and...

well, since you have already checked many options, one other thing that could cause a problem like that is the idle control valve,
pvc valve, throttle control sensor, and even the EGR valve, but a diagnostics check-up should tell you more efficiently what the problem is.

Dec 26, 2014 | Dodge Cars & Trucks

1 Answer

Ck engine codes

Possible causes for P1505 & p1507
Faulty Idle Speed Control Actuator valve, harness is open or shorted, Idle Speed Control Actuator valve circuit poor electrical connection. No the codes are not related to the EGR. P0198 is related to the engine oil temperature sensor. By the way you should use a meter as supposed to a test light. The test light will not be able to measure 5 volts reference or voltage drops. However I would try replacing the affected parts based on the codes and the info you've provided. Good luck.

Apr 02, 2014 | 2005 Kia Spectra

1 Answer

High Idle Speed

The idle speed is not supposed to be adjustable. It is controlled by the computer.
What you may have is a vac leak, or the throttle cable may not be adjusted correctly.
If the throttle plate is completely closed, and there are no vac leaks, the idle air control valve is supposed to control idle speed by regulating how much air enters the intake.

Apr 12, 2013 | 2001 Mazda 626

1 Answer

Signs of idle throttle valve sensor

Whenever you have this kind of problem you must get the system computer scanned for any poss problems, the idle is controlled by a computer and is fully automatic.

Jan 20, 2012 | Chevrolet 1500 Cars & Trucks

2 Answers

My 1991 town car will not idle but runs good but misses and dies when pressure is removed from accelerator pedal

idle control valve if it is injection if its on carburettor set-up then have the carburettor set up and cleaned this should fix ya

Nov 04, 2011 | 1991 Lincoln Town Car

1 Answer

When i turn on the ac the idle goes low and the the car vibrates. When i turn off the ac the car stop vibrating.


The Idle Air Control (IAC) valve controls the amount of air that bypasses the throttle valve, which controls the engine idle speed. The IAC valve consists of windings, an armature, a return spring, and a rotary slide. The engine control module (ECM) pulses the voltage to the winding, the opposing forces on the armature by the return spring cause it to maintain a fixed position, adjusting the amount of bypass air to maintain the correct idle speed.

Removal & Installation

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the idle air control valve harness electrical connector.
  3. Using a suitable tool, remove idle air control valve.
  4. Installation is in reverse order of removal.


Checking Idle Air Control Valve (IAC) Triggering

  1. Check IAC valve is electrically OK.
  2. Slide up boot on the IAC valve connector.

0900c152801c00a1.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. IAC Connector

  1. Use scan tool 'Output Diagnostic Test Mode' function 03 to trigger the IAC valve - N71.
  2. Connect VAG 1527B voltage tester, or equivalent, between terminal 1 and engine ground (GND). Voltage tester must flash.
  3. Connect VAG 1527B voltage tester, or equivalent, between terminal 2 and battery positive voltage (B+). Voltage tester must light up.
  4. If specified results are not obtained:
    1. Connect VAG 1598/19 test box, or equivalent, to ECM harness connector.
    2. Check the wiring between harness and connector terminal 1 (in engine compartment) to test box socket D11 . Then check the wiring between harness connector terminal 2 and test box socket D9 using wiring diagram. Repair as necessary.
    3. If the wiring is okay, but triggering still does not occur, replace the ECM.
    4. If the triggering signal and the wiring are okay and the valve does not react, replace the IAC valve.

Checking Mechanical Function
  1. Remove the idle air control (IAC) valve.
  2. Visually check the surface of the rotary slide (arrow) for signs of wear.

0900c152801c00a2.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Showing the IAC Valve

WARNING Do NOT check for ease of movement by prying on the rotary slide with a screwdriver or other tools that could cause scratching or other damage.

  1. Reconnect the IAC valve, while still removed, to the harness connector.
  2. Use scan tool 'Output Diagnostic Test Mode' function 03 to trigger IAC valve - N71.
  3. Check whether rotary slide moves freely from stop to stop.
  4. If there are signs of scoring, or if the rotary slide does not move freely in both directions, replace the IAC valve.
  5. If the IAC valve does not respond (not triggered) during the Output Diagnostic Test Mode, check triggering.

Resistance Test
  1. Remove the idle air control valve harness connector.
  2. Use a suitable Digital Multimeter (DMM) to measure the resistance between the 2 terminals of the idle air control valve.
  3. The correct measurement should be 7-11 ohms. If not, replace the idle air control valve.

NOTE At room temperature, the resistance value will be lower. The resistance value will be higher if the Idle Air Control (IAC) valve is measured at under-hood operating temperatures.
  1. Reconnect the idle air control valve harness connector.
  2. The idle air control valve should hum and vibrate slightly when the ignition is turned 'ON'. If not, the ECM or harness may be defective.

Testing with VAG1551:
  1. Remove the idle air control valve harness connector.
  2. Connect the VAG 15278 LED tester to terminals 1 and 2 of the harness connector using the jumpers from VW 1594 adaptor kit.
  3. Turn ignition ON, perform steps from output DTM (Diagnostic Test Mode) to activate the IAC valve (N71) LED tester must blink.
  4. If tester does not blink, check wiring using VAG 1598 pin out box, electrical checks, step 26. Repair as necessary.
  5. If wiring is okay, replace the ECM.
  6. If LED tester blinks but the IAC valve does not operate, replace the IAC valve.

Feb 15, 2011 | 2000 Volkswagen Jetta TDI

2 Answers

Stalls at idle no fluxuation in voltage at iac

It is most likely the EGR (Exhaust Gas Recirculation) valve.
The valve is supposed to close when the car is idling and open other wise.

Inspect it / Replace it.

Hope this helps!

Sep 17, 2009 | 2003 GMC Sierra

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