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IAC valve mirage

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How to check the resistance on the iac in a 2000 acura ti?


Here you go: 2000 3.2TL - DTC Troubleshooting: P1519 (14)

DTC P1519: IAC Valve Circuit Malfunction

  1. Reset the PCM.

  2. Turn the ignition switch ON (II).

    Is DTC P1519 indicated? YES -

    Go to step 3.
    NO -

    Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the IAC valve and the PCM.n

  1. Turn the ignition switch OFF.

  2. Disconnect the IAC valve 3P connector.

  3. Turn the ignition switch ON (II).

  1. Measure voltage between IAC valve 3P connector terminal No. 2 and body ground.

    Is there battery voltage? YES -

    Go to step 7.
    NO -

    Repair open in the wire between the IAC valve and the PGM-FI main relay.n

rjaai003_204.asp?menuid=rdbawh030000&sessionid=20a4339a-9fe0-4aa5-b153-7284daac493a&lang=0&dbkey=s80wa32k72100091519faad01
  1. Turn the ignition switch OFF.

  1. Check for continuity between body ground and IAC valve 3P connector terminal No. 1.

    Is there continuity? YES -

    Go to step 9.
    NO -

    Repair open in the wire between the IAC valve and G101.n

rjaai003_204.asp?menuid=rdbawh030000&sessionid=20a4339a-9fe0-4aa5-b153-7284daac493a&lang=0&dbkey=s80wa32k72100091519faad02
  1. Disconnect PCM connector B (25P).

  1. Check for continuity between body ground and PCM connector terminal B23.

    Is there continuity? YES -

    Repair short in the wire between the IAC valve and the PCM (B23).n
    NO -

    Go to step 11.

rjaai003_204.asp?menuid=rdbawh030000&sessionid=20a4339a-9fe0-4aa5-b153-7284daac493a&lang=0&dbkey=s0k3a02k77100091519faad01
  1. Connect IAC valve 3P connector terminal No. 3 to body ground with a jumper wire.

rjaai003_204.asp?menuid=rdbawh030000&sessionid=20a4339a-9fe0-4aa5-b153-7284daac493a&lang=0&dbkey=s0k3a02k77100091519faad02
  1. Check for continuity between PCM connector terminal B23 and body ground.

    Is there continuity? YES -

    Go to step 13.
    NO -

    Repair open in the wire between the IAC valve and the PCM (B23).n

rjaai003_204.asp?menuid=rdbawh030000&sessionid=20a4339a-9fe0-4aa5-b153-7284daac493a&lang=0&dbkey=s0k3a02k77100091519faad03
  1. Remove the jumper wire from the IAC valve 3P connector, then reconnect the IAC valve 3P connector.

  2. Turn the ignition switch ON (II).

  1. Measure voltage between body ground and PCM connector terminal B23.

    Is there battery voltage? YES -

    Substitute a known-good PCM and recheck. If the symptom/indication goes away, replace the original PCM.n
    NO -

    Replace the IAC valve.n

rjaai003_204.asp?menuid=rdbawh030000&sessionid=20a4339a-9fe0-4aa5-b153-7284daac493a&lang=0&dbkey=s0k3a02k77100091519faad04

May 17, 2014 | 1996 Acura TL Series

2 Answers

Idle air control


Clean throttle body,could be IAC sensor.

May 21, 2013 | 2000 Mitsubishi Mirage

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.



Operation

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.


Testing

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

1 Answer

Diagnostics test says idle air control underspeed error? how do i fix 1999 ford explorer


change the idle air control valve.

Idle Air Control (IAC) Valve OPERATION The Idle Air Control (IAC) valve controls the engine idle speed and dashpot functions. The valve is located on the side of the throttle body. This valve allows air, determined by the Powertrain Control Module (PCM) and controlled by a duty cycle signal, to bypass the throttle plate in order to maintain the proper idle speed. Fig. 1: Typical Idle Air Control (IAC) valve which is mounted to the throttle body - cutaway view shows air bypass direction 89684g16.gif
--- REMOVAL & INSTALLATION
  1. Disconnect the negative battery cable. To remove the IAC valve, first disconnect the negative battery cable, then the IAC wire harness plug 89684p03.jpg
    Next, remove the two IAC valve attaching bolts . . . 89684p04.jpg
    . . . and pull the valve from the intake manifold 89684p05.jpg

  2. Disengage the wiring harness connector from the IAC valve.
  3. Remove the two retaining screws, then remove the IAC valve and discard the old gasket. To install: When installing the valve, always discard the old gasket and install it using a new one 89684p06.jpg

  4. Clean the IAC valve mounting surface on the throttle body of old gasket material.
  5. Using a new gasket, position the IAC valve on the throttle body. Install and tighten the retaining screws to 71-106 inch lbs. (8-12 Nm).
  6. Attach the wiring harness connector to the IAC valve.
  7. Connect the negative battery cable.
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Oct 15, 2010 | 1999 Ford Explorer

1 Answer

When my car is in park it idles normally, but as soon as i switch to drive the rpm decreases qute a bit, and if i put on the ac it even idles lower can it be the IAC valve that needs to be replaced?


You could try adjusting the idleing screw. It should be at the end of the air intake were it mounts to the throttle body. If possible get a Haynes repair manual for your car at the nearest auto parts store it will show you exactly where it is located.

Oct 02, 2010 | 1995 Mitsubishi Mirage

1 Answer

I need to know where the idle adjustment screw is on a 92 Saturn SL1 and what wrench to use.


its located on the throttle body connected to your air intake manifold where your throttle cable connects on the throttle body there is a adjustment screw connected there

Nov 03, 2009 | 1992 Saturn SL1

2 Answers

2001 Mitsubishi Mirage idles ruff while stopped at a stop light what can I do? Just had oil and filter changed 3 months ago.


How long has it been since you treated your engine to a tune up?I would change your spark plugs and wires.

Aug 04, 2009 | 2001 Mitsubishi Mirage

1 Answer

IAC VAlve on 2001 Mitusbishi Mirage DE 2 door 145,000


I would try to clean the IAC with a little CHEMTOOL and see if that helps first.

Feb 07, 2009 | 1995 Mitsubishi Mirage

1 Answer

I have a 98 mitsubishi mirage that i just had a tune up on. The check engine light has now come on and 1 mechanic is telling me that the IAC motor is about to go out and another said that I needed to get...


well both solutions are possible but since you are on a budget I would replace just the IAC motor it may not need a computer this is the most economical solution

Oct 06, 2008 | Mitsubishi Mirage Cars & Trucks

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