Question about 1996 Acura TL Series

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

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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

How to check the resistance on the iac in a  2000  - 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


  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.


  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

    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
      NHow to check the resistance on the iac in a 2000 - rjaai003_204.asp?menuid=rdbawh030000&sessionid=20a4339a-9fe0-4aa5-b153-7284daac493a&lang=0&dbkey=s0k3a02k77100091519faad0404.asp?menuid=rdbawh030000&sessionid=20a4339a-9fe0-4aa5-b153-7284daac493a&lang=0&dbkey=s0k3a02k77100091519faad04" alt="rjaai003_204.asp?menuid=rdbawh030000&sessionid=20a4339a-9fe0-4aa5-b153-7284daac493a&lang=0&dbkey=s0k3a02k77100091519faad04" class="h_mi" />

Posted on May 18, 2014

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You would measure it with an OHM meter. It should read about 12 ohms. Then measure from connector to body (testing for shorts). It should read open not shorted to body.

Posted on May 17, 2014

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1 Answer

2000 acura tl shows misfire on all cylinders but car runs smoothly


check that the HT leads are separated and not touching each other. The misfire may be simply the spark being inducted into the plug with the least resistance and is random and that is what is setting off the light.

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Why does my 2000 acura tl stalling


Try cleaning the throttle body and Idle controll valve with seafoam or gummout spray and if it still stalls replace the Idle Controll (IAC) valve.
If the check engine light is on and this is a USA car, the repair may be covered under a warranty extension this car has till 150,000. This video could be helpful...


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2000 acura tl stalling


Try cleaning the throttle body and Idle controll valve with seafoam or gummout spray and if it still stalls replace the Idle Controll (IAC) valve.

If the check engine light is on and this is a USA car, the repair may be covered under a warranty extension this car has till 150,000. This video could be helpful...




Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Nov 15, 2011 | 2000 Acura TL

2 Answers

95 GMC surburban keeps dying when in low rpm. I replaced the fuel filter and it ran good for a few days, then started crapping out again. I then replaced the spark plugs and wires and it ran great for...


First check for a vacuum leak. Any small loose hoses in the engine compartment? If not, suspect the idle air control valve. I have pasted test procedures for the iac below. Be careful not to confuse the tps with the iac. The tps is centered on the ybro5ttle body. The iac is more on the perimeter. An additional test I do after checking the valve is to plug it back in while it is still off the throttle body and verify that it actuates a little when the key is turned on. It should back up a tad to allow idle air through the passage for starting.

TESTING
Disengage the IAC electrical connector.Using an ohmmeter, measure the resistance between IAC terminals A and B. Next measure the resistance between terminals C and D.Verify that the resistance between both sets of IAC terminals is 20-80 ohms. If the resistance is not as specified, the IAC may be faulty.Measure the resistance between IAC terminals B and C. Next measure the resistance between terminals A and D.Verify that the resistance between both sets of IAC terminals is infinite. If the resistance is not infinite, the IAC may be faulty.Also, with a small mirror, inspect IAC air inlet passage and pintle for debris. Clean as necessary, as this can cause IAC malfunction.


Fig. Fig. 2: Using an ohmmeter, backprobe terminals of the TPS sensor to check for proper resistances



Fig. Fig. 3: The TP sensor and IAC sensor are usually located at the side of the throttle body



Fig. Fig. 4: Idle Air Control (IAC) valve wiring and terminal identification
REMOVAL & INSTALLATION

Disconnect the negative battery cable.Disengage the electrical connection.Remove the IAC valve. On thread-mounted units, use 1 1 / 4 in. (32mm) wrench and on flange-mounted units, remove the screw assemblies.Remove the IAC valve gasket or O-ring and discard it.To install:
Clean the old gasket material from the surface of the throttle body assembly on the thread mounted valve. On the flange-mounted valve clean the surface to ensure proper O-ring sealingInstall the valve with a new gasket or O-ring. Tighten the thread mounted assembly 13 ft. lbs. (18 Nm) and tighten the flange mounted attaching screws to 28 inch. lbs. (3 Nm).Engage the electrical connector to the IAC valve.Connect the negative battery cable.ecd523da-60e9-4928-9b74-9d90b47be2df.gif0996b43f802319fe-tedh1mdkpnm2cwqabpnjpaem-4-2.gif0996b43f802319ff-tedh1mdkpnm2cwqabpnjpaem-4-3.gif0996b43f80219b22-tedh1mdkpnm2cwqabpnjpaem-4-4.gif

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Jul 21, 2017 | 1995 GMC Suburban

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

2 Answers

Actron trouble code PO505 99 acura


P0505 - IAC (Idle Air Control) System Malfunction

The IAC (Idle Air Control) valve controls the idle speed of the engine. At idle the throttle plate is closed, of course. The IAC is computer controlled and allows only a certain amount of air around the throttle plate. This metered air controls the idle speed. The IAC has a "plunger" or "shutter" that moves to open or close the bypass air passageway. The more air the IAC allows around the throttle plate, the higher the idle. The PCM (Powertrain Control Module) uses the IAC valve to keep the idle speed correct with varying engine demands. Can be a three or four wire sensor depending on the model.

The PCM monitors voltages of the IAC circuits and if it detects an incorrect voltage on one or more of the IAC motor circuits it will set P0505. NOTE: Problems with the IAC would only be noticeable at idle or when throttle is closed.

Symptoms may include:
* MIL (Malfunction Indicator Lamp) illumination
* Engine stalls and may not idle unless throttle is depressed
* Intermittently stalls when letting off the throttle
* Engine may idle too high


Potential causes of an P0505 code include:
* IAC motor connector is damaged (check connector and pins for damage, and moisture)
* One or more IAC circuits open or shorted to ground
* One or more IAC circuits are shorted to voltage
* IAC has failed
* PCM has failed


Possible Solutions:
This should be a fairly straightforward diagnosis. Start by clearing the fault codes. Then unplug the IAC and start the engine (This may cause other IAC codes to set. Just ignore them for now). If the P0505 code doesn't reset, replace the IAC. It is internally shorting one of the IAC circuits. If the code DOES return after unplugging the IAC and starting the engine, then you know it isn't the IAC motor. Visually check the wiring harness all the way back to the PCM. You may need to visually inspect the harness by removing all the insulation off the wires. It is possible that the wires could be shorting to eachother or to other wires in the harness.

If there are no wiring problems, and the code keeps returning with the IAC unplugged, you can check the PCM by removing the IAC wires from the PCM connector (or clipping the wires in a location where they can be repaired easily) and then start the engine (If you're not sure, don't do it. Take it to a qualified professional). Now if the code doesn't reset there is a problem with the wiring. Check for continuity on all the IAC wires. Any resistance points to a problem. Check for voltage on any(At this point there shouldn't be any voltages on the wires because they're clipped at one end and unplugged at the IAC). Repair as necessary. But if the P0505 code DOES reset after removing the IAC wires from the PCM connector(or clipping them), replace the PCM, there's a problem internally on the IAC control circuit.

Hope this helps (remember to rate and commene this).

Jan 06, 2011 | 1996 Acura TL Series

1 Answer

Motor reves up high when started can not keep it running because its reved up so high


First check to make sure the throttle return springs are closing the throttle. If that's good, the problem is likely a bad idle air control valve/motor. Take the valve out and check for obstructions in the port that could keep the valve from closing. Then, if you have an ohmmeter, you can run these checks on the valve:
    jturcotte_549.gif
    IAC location:
    jturcotte_550.gif
    Remove IAC, check for obstructions in passage, run electrical testsjturcotte_551.gif
    1. Disengage the IAC electrical connector.
    2. Using an ohmmeter, measure the resistance between IAC terminals A and B . Next measure the resistance between terminals C and D .
    3. Verify that the resistance between both sets of IAC terminals is 20-80 ohms. If the resistance is not as specified, the IAC may be faulty.
    4. Measure the resistance between IAC terminals B and C . Next measure the resistance between terminals A and D .
    5. Verify that the resistance between both sets of IAC terminals is infinite. If the resistance is not infinite, the IAC may be faulty.
    6. Also, with a small mirror, inspect IAC air inlet passage and pintle for debris. Clean as necessary, as this can cause IAC malfunction.

Dec 19, 2010 | 1997 Chevrolet Cavalier

2 Answers

Idle goes up to 2000rpm then fluctuates to 1500 to 2000 then when operatin temp idles to 900


This sounds like a faulty idle air control valve (IAC). A leaking vacuum line could also cause these symptoms. Check for vaccum leaks, and then for faulty connections at the IAC. It is located near or in the throttle body. If no leaks are found, disconnect wiring to IAC. If behavior is the same with IAC disconnected, the IAC probably needs replacement. Sometimes they can be cleaned, but this usually doesn't help for long. You can probably also get resistance specs for the IAC from the dealer and check the IAC resistance with a ohmmeter to see if it is OK. If the IAC is OK and there are no obvious vac. leaks, you might have an intake manifold leak. This can be tested by aiming an UNlit propane torch at the base of the intake at different points with engine running. If the idle increases in response, the intake is probably leaking. This is unusual on Hondas/Acuras, though.

Dec 12, 2009 | Acura TL Cars & Trucks

1 Answer

- will not idle at proper setting, stalls when put into gear


Check for vacuum leaks and test the idle air conrtol valve.

0900c1528006c55b-lxsvs4ftyjtcqsaualeaxmu4-4-0.gif TESTING

See Figure 2
  1. Disengage the IAC electrical connector.
  2. Using an ohmmeter, measure the resistance between IAC terminals A and B. Next measure the resistance between terminals C and D.
  3. Verify that the resistance between both sets of IAC terminals is 20-80 ohms. If the resistance is not as specified, the IAC may be faulty.
  4. Measure the resistance between IAC terminals B and C. Next measure the resistance between terminals A and D.
  5. Verify that the resistance between both sets of IAC terminals is infinite. If the resistance is not infinite, the IAC may be faulty.
  6. Also, with a small mirror, inspect IAC air inlet passage and pintle for debris. Clean as necessary, as this can cause IAC malfunction.

0900c1528006c55c-lxsvs4ftyjtcqsaualeaxmu4-4-2.gif

Do It Yourself Diagnosis and Repair

Sep 02, 2017 | 1987 GMC VanDura

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