Question about 1990 Toyota 4Runner

1 Answer

Trouble code issue on my 89 4runner

I got a 89 4runner from a friend and put a new motor in it and the engine light is on. i ran the codes and it reads code# 51 switch signal-idl, nsw or a/c signal to ecu missing with check terminals e1 and t shorted. my problem is what does (idl) (nsw) mean

Posted by on

  • 78chevycrawl Mar 12, 2009

    it was a good idea but it did not work.

  • 78chevycrawl Mar 12, 2009

    thanks for trying because it wasen't the issue. i appriciate the help and thanks for the suggestion



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.


    An expert that got 20 achievements.


    An expert that got 10 achievements.

  • Toyota Master
  • 77,194 Answers

Check the back of the Ignition Switch to make sure the electrical part of the Ignition switch is not loose as the retaining screw tends to loosen off.

Posted on Mar 11, 2009

  • yadayada
    yadayada Mar 12, 2009

    tried to help, why the Thanks for trying??

  • yadayada
    yadayada Mar 12, 2009

    good luck,



1 Suggested Answer

  • 2 Answers

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

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

What would make my 2000 deville not to start?

Your security system may be causing a problem? Any applicable trouble codes? To check codes, yourself, at the least, you need an obd2 code reader.
Is there a security lamp on the dash that is staying on? There might be a relearn procedure you could try if it is a security system issue?

Feb 27, 2017 | 2000 Cadillac DeVille

1 Answer

1998 town and country lx 3.8 liter engine issues

Is the check engine light on and have you checked for trouble codes yet ?

Aug 25, 2014 | 1998 Chrysler Town & Country

1 Answer

Engine code 25 26

man there is a lot of chatter about those codes and O2 sensors. I do know my truck popped a couple of those error. It ran rough and generally made my truck upset. I finally ran it down to the dealer and they said it was a broken spark plug. This happens to me in the winter. Run it by a dealer, but first pop the hood, start the engine have a friend rev the engine a couple times and see if you see an odd light from a spark plug or two. Best if this is done at night. Just be very careful not to reach in while the engine is running. Just watch. If you see the blue light, kil the engine replace that spark plug and retest. You can read here what some other tried:
Trouble codes 25 and 26 where to start Toyota Nation Forum Toyota Car and...

Apr 17, 2014 | Toyota Pickup Cars & Trucks

1 Answer

5456-p3054 jammed starter or electrical malfunction codes on diagnostic test

hi sammy check that the main battery cablethatattaches to the starter is not touching against the body or any other metal component ,also checkstarter fuse may have blown

Jan 30, 2014 | Cars & Trucks

1 Answer

My 96 grand cherokee is shutting down,have replaced almost everything but crank sensor will this be the end of my problems???please help

If the crank sensor is failing, you should get a check engine light and a trouble code for it.
Have you had the computer checked for trouble codes ?

Aug 17, 2012 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Coding a 2106 and a 2135 on 2006 Ford Expedition. Replaced the Throttle monitor sensor and cleaned the throttle body. Drove car and it ran good but next time it did the same thing. Engine failsafe and...

You need to determine if the ETC Failsafe is from a
bad throttle body motor (TACM) or coil misfires that are
putting it into failsafe.

The TPS Sensor you replaced,wasn't likely the issue.

Put in new spark plugs
The champion 1 piece ones 7989-- from Napa CHA 7989

You will need the Lisle 65600 Broken Spark Plug Remover Tool
as you will get a couple OEM 2 piece glued together ones break.

Remove PCM from fire wall to get to #4 Plug on pass side

Change the front O2 Sensors at 100,000 miles & clean the MAF
Sensor & Clean the Throttle Plate again.

May 21, 2011 | Ford Expedition Cars & Trucks

1 Answer

Ran out of gas recently. when refueled and started again,check engine symbol stayed on? well mainted and has always ran great since new.

Sometimes the check engine light will come on if the fuel cap is not on tight enough. Check the fuel cap for an intact seal and install at correct tightness.

A major auto parts store will read out the stored trouble code in the car's computer for free. If the code pertains to the fuel EVAP system, the code probably set because you ran out of gas. Copy down the code and then have it erased. The check engine light should go out. If it comes on again, have the code read and the problem checked out.

Mar 05, 2011 | GMC Sierra Cars & Trucks

3 Answers

2005 toyota corolla light comes on then goes off for a few days e

Did you have engine trouble codes checked? Parts stores will do it for free. Ask them to explain what the codes mean, and what they recommend. If you have any questions, post them here with the code #'s. The engine light can come on if the gas cap is loose, but after securing, should go off. How is the cars performance? Running ok, just engine light coming on?

Mar 25, 2009 | 2005 Toyota Corolla

1 Answer

2000 3.6L ford Mustang with TPS trouble code P0122

Make sure you installed the correct TP sensor. If so you may have a bad one. I have gotten bad "new" parts before. If all your problems started with the installed part start there.

Mar 10, 2009 | 2005 Ford Mustang

2 Answers

1997 buick lesabre, engine light stays on

The are many things that can cause your "check engine" light to stay on. One possibility is that although you have fixed the trouble code for your crankshaft position sensor, the code has not been erased from the computer's memory. Another possibility is that you have another issue going on that is causing a new trouble code to come up. You're going to need to have your car hooked up to a ODB-2 engine code reader to see what the issue is. These code readers are available for purchase at any auto parts store. In addition, many of your local auto parts stores will check trouble codes as a free service to customer. If not, many parts retailers offer the option to rent one of these code readers. Which ever way you decide to go, run a full engine/emissions trouble code check. If the only code that comes up is the code that came up previous to fixing your positioning sensor, then all you need to do is erase the trouble code from the computer's memory. (Most code readers have the option to erase trouble codes, but if you're going to rent or buy one, I would suggest that you check to make sure that the code reader that you're getting is capable of erasing trouble codes as some code readers only indicate the codes and will not remove them from your computer's memory.) If your trouble code scan reveals other codes, then you'll have to fix and erase them as they arise.

FYI- In my experience, I've noticed that 95% of the time that a check engine light/trouble code arises that it is usually an emissions problem (oxygen sensors, mass air-flow units, MAP sensors, etc.). However, General Motors products are notorious for getting trouble codes for having loose battery/ground connections and for having worn-out fuel caps. With any GM vehicle, I always check these two things first to try to save me from having to look further than I need to.

Hope this helps! I'm sure once you've scanned your cars computer and erased any existing trouble codes, that you'll stop being annoyed by your check engine light, as I know how bothersome it can be. Have a great day!

Nov 23, 2008 | 1997 Buick LeSabre

Not finding what you are looking for?
1990 Toyota 4Runner Logo

Related Topics:

464 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toyota Experts


Level 3 Expert

77194 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22265 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8743 Answers

Are you a Toyota Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides