Having problems with your 2002 Toyota ECHO ?

Where is the IAC on my 2002 Toyota Echo?

\015 I got a P0505 error when diagnosing my car. I've been told the IAC needs cleaned or replaced. But where is it??\015 Posted / edited by AnonymousUser on : 15-01-2018

Answers :

The IAC is on the bottom of the throttle body and has a hole in the bottom of the throttle body that lets air into the IAC. YOu do not have to remove it, if you do remove it the throttle body would have to come off and a new gasket would be required. Usually spraying through with throttle body cleaner will clean the IAC so it functions properly.

About your P0505 faut code, 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) illuminationEngine stalls and may not idle unless throttle is depressedIntermittently stalls when letting off the throttleEngine 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 groundOne or more IAC circuits are shorted to voltageIAC has failedPCM 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.
Repair Help & Product Troubleshooting for 2002 Toyota ECHO

Tips for a great answer:

- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.

Suggested Questions/Answers :

How can I to change or regulate the RPMs in my toyota echo 2001. After a clean in the iac valve the RPMs of engine were changed in idle acceleration I hear that the engine is more accelerate that before of the clean in the iac valve. Can you help me please?.

Idle is controlled through the on board computer and is not adjustable, however after u cleaned the system you need to disconnect the battery for 5 minutes and then let the system relearn the idle speed, this takes about 30 miles of driving a combina ... 2002 Toyota ECHO

Where is the IAC on my 2002 Toyota Echo?

The IAC is on the bottom of the throttle body and has a hole in the bottom of the throttle body that lets air into the IAC. YOu do not have to remove it, if you do remove it the throttle body would have to come off and a new gasket would be req ... 2002 Toyota ECHO

How to do a idle iav iac relearn on a 2005 toyota echo?

... 2005 Toyota ECHO

How do i put on drl on my toyota echo - 2005 Toyota ECHO

... 2005 Toyota ECHO

When does a 2003 toyota echo need a tune-up - 2003 Toyota ECHO

Every 10,000 miles ... 2003 Toyota ECHO

2000 toyota echo timing belt replacement - 2000 Toyota ECHO

Hi. Toyota echo uses a chain drive cam. No timing belt ... 2000 Toyota ECHO

Batterie toyota echo 2001 what number - 2001 Toyota Echo

... 2001 Toyota Echo

How to change front struts toyota echo - 2001 Toyota Echo

\015\012remove wheel\015\012undo top and bottom strut bolts...3 in the engine bay and two at the wheel end.\015\012remove strut ... 2001 Toyota Echo

How to replace 2000 toyota echo rear struts - 2000 Toyota ECHO

... 2000 Toyota ECHO

Remove rear break hub on2004 toyota echo - 2004 Toyota ECHO

And what happen?....... ... 2004 Toyota ECHO

Toyota echo repair manual - ECHO Toyota Cars & Trucks

... Toyota ECHO

Service manual for toyota 2000 echo - 2000 Toyota ECHO

Best solution is to buy the AllData individual service manual from some place like Autozoneif you want the actual service manual then you will spend $300+ from the dealer ... 2000 Toyota ECHO

How to change blower motor on toyota echo - ECHO Toyota Cars & Trucks

Hello\015\012the blower motor is located under the dash on the right or passenger side of the car, remove the panel that is under the dash to gain access to it, the blower will be held into the plastic blower housing by 3 course thread machine ... Toyota ECHO

How to replace a starter a Toyota Echo 2001? - 2001 Toyota Echo

Hello,\012\012\012Get under your car, remove the right hand side under engine covers. the starter is held in by two bolts. i believe they are either 12mm or 14mm. remove thoses and take the starter out. should be simple\012 ... 2001 Toyota Echo

Serpentine belt diagram 2003 toyota echo - 2003 Toyota ECHO

... 2003 Toyota ECHO

What is the 2002 toyota echo freon capacity? - 2004 Toyota ECHO

There should be a sticker somewere under the hood with th specs for the A/C if not you can call your local toyota dealer and ask for the service department and the can look it up for you. ... 2004 Toyota ECHO

I have engine check light on my toyota echo - 2003 Toyota ECHO

In my case it was the rubber seal on the gas cap ... the computer codes were just generic .. so didnt pin point anything .. \015\012replacing the cap resolved the problem .. .. the system checks for leaks in the gas cap (or a loose cap) ... 2003 Toyota ECHO

How many belts are on a 2003 toyota echo? - 2003 Toyota ECHO

Hi. Your car will have only one serpentine style drive belt. Check the diagram below. 1.5 L 4 CYL\015\012\015\012 ... 2003 Toyota ECHO

Is octane 85 gas ok for 2003 toyota echo? - 2003 Toyota ECHO

95 unleaded ... 2003 Toyota ECHO

Engine Diagram 2003 Toyota Echo - ECHO Toyota Cars & Trucks

... Toyota ECHO

Dash bulb replacement on a 2000 toyota echo - ECHO Toyota Cars & Trucks

... Toyota ECHO

Owners manual for a 2003 toyota echo - ECHO Toyota Cars & Trucks

... Toyota ECHO

2000 toyota echo code po1725 - 2000 Toyota ECHO

See above chart CIRCUIT DESCRIPTION This sensor detects the rotation speed of the \012input turbine. By comparing the input ... 2000 Toyota ECHO

How to reset radio code for toyota echo - 2002 Toyota ECHO

... 2002 Toyota ECHO

Replace headlamp unit on 2000 Toyota echo - 2000 Toyota ECHO

How to remove headlamp unit on toyota avensis 2004 drivers side ... 2000 Toyota ECHO
  • Start your question with What, Why, How, When, etc. and end with a "?"
  • Be clear and specific
  • Use proper spelling and grammar
all rights reserved to the respective owners || www.carrestorationshop.com || Terms of Use || Contact || Privacy Policy
Load time: 1.0484 seconds