How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Virtual Technician Your Own Question

Virtual Technician
Virtual Technician, ASE Certified Technician
Category: Car
Satisfied Customers: 96
Experience:  25 years Experience. All makes and models, Shop Owner, Access to 4 repair databases. - I take the Opt Out Questions :)
14357943
Type Your Car Question Here...
Virtual Technician is online now
A new question is answered every 9 seconds

Isuzu Trooper: 2001 Isuzu Trooper with automatic Torque on

Customer Question

2001 Isuzu Trooper with automatic Torque on Demand 4 x 4. I had the transmission rebuilt and now the TOD 4 x 4 lights flash constantly with a light below saying CHECK. The dash button for automatic 4 x 4 does not engage the front differential, the lever on the floor for low works. When you stop the lever in the neutral position the lighs stop flashing. We are not getting current from the dash switch down to the electric over vacum swithces on the front differential. when we ran a jumper wire fron the dash switch down to the diff switches the 4 x 4 worked with the dash switch but the lights kept flashing. HELP, William
Submitted: 1 year ago.
Category: Car
Expert:  Virtual Technician replied 1 year ago.

Virtual Technician :

Hello, My name is XXXXX XXXXX I will try my best to help you with your vehicle issue.

Virtual Technician :

Do you have a code 28?

Customer:

I am in the country of Panama and computers to read trans has not been found so no way to know codes

Customer:

I am told that a shop near my village has such a computer but they are not sure how to read it. Monday when they open I will visit and see if they can read the codes if any show up. I am using an internet cafe machine so am not on line all the time, will check in Monday in the afternoon with info on what I find. W

Expert:  Virtual Technician replied 1 year ago.

Alright, that makes it quite a bit tougher but let's see what we can do.

Please note: Not every answer I give you is something you were hoping to hear, even though it is true.
Such as; (it's more expensive than you wanted to spend, or you will need to have a professional repair shop do the diagnostics and /or repairs due to complexity reasons).



1. Check for broken vacuum lines in the TOD system.

2. Check for vacuum to the Front Axle Vacuum Solenoids.

3. Check for battery voltage to the Front Axle Vacuum Solenoids on the Blue/Yellow wire in 2WD and no voltage (near 0 volts) in TOD 4WD.

4. Check the Front Axle Switch for 12 volts in 2WD and no voltage (near 0 volts) in TOD 4WD when the front axle is engaged.
Tech Tips: There are two Front Axle Vacuum Solenoids (on the center of the front axle) that are controlled by the TOD Control unit (below the right front seat) to control vacuum to the front axle diaphragm to engage the front axle. There is a Front Axle Switch on the left center of the front axle that tells the TOD control unit that the front axle is engaged. The Front Axle Vacuum Solenoids are wired in parallel.
Virtual Technician, ASE Certified Technician
Category: Car
Satisfied Customers: 96
Experience: 25 years Experience. All makes and models, Shop Owner, Access to 4 repair databases. - I take the Opt Out Questions :)
Virtual Technician and 15 other Car Specialists are ready to help you
Expert:  Virtual Technician replied 1 year ago.
Please let me know what you find on these
Customer: replied 1 year ago.


Hola, I checked the vacum lines and found that a line from the engine has vacum into each of the vacum seolenoids, the right side of the blue and the left side of the white. Vacum from the center of the çenter of the white to the piston control but not from the center of the blue one to the other tip on the piston control. No vacun on the left of blue and none on the right of the white, these 2 lines go up to the drivers fender well and attach to a small vent. The 2 lines that have vacum also go back to a small tank on the frame under the drivers door. We have 12 volts to the front axle 4WD automatic switch on the dash but none to the front axle vacum Solenoids. Does this current by chance go thru the TOD Control under the passangers seat.? ?the drive shaft from the transfer case to the fromt axle turns all the time when driving even in 2WD, is this supposed to be that way? We did not have this blinking light problem before we removed the transmission to rebuild it for the hard shift from 1 to 2 and 2 to 3. When they installed it rebuilt the lights started blinking. When the 4 x 4 floor lever is in 2WD the lights blink, when it is in the neutral position it goes out. When it is forward in the 4L position they blink and the car is in 4 x 4. Sorry for all the ? but being in a 3rd world country is difficult to get repairs.

Expert:  Virtual Technician replied 1 year ago.
Have you checked to make sure no electrical or vacuum lines were pinched or damaged when replacing the transmission?
Customer: replied 1 year ago.


All the vac lines I can see are open, I guess I need to go back to the shop and have them drop the guards and cross menbers so we can look for electricl wires in that area. It seems strange to me that the lihgts go out when we put the 4 x 4 floor shift lever in the neutral position, maybe there are some electrical wires inside the transfer case ? Are you aware of any inside the transfer case ?

Expert:  Virtual Technician replied 1 year ago.

Here's the wiring diagrams for the transfer case - they are kind of spread out as this is the way Isuzu makes their diagrams.

The module is the tricky part that would take an ISUZU factory tool to check inputs & outputs from.

graphicgraphicgraphicgraphic

Expert:  Virtual Technician replied 1 year ago.

Good morning,

Just following up to see how the inspection went.

Have a great day,

Rich

Customer: replied 1 year ago.


We have been in Mardi Gras Carnival mode for the past ten days, no work as all the mechanics stay drunk. Yesterday we put the car on the pit and in 5 mins he found a pinched wire that was the result of not paying attention when they installed the rebuilt job. All works ok now, thanks for your help, I will arrange to release the payment to you. W

Expert:  Virtual Technician replied 1 year ago.

That's great - I'm glad that we were on the right track and that it was an easy fix.

Have a great weekend!

Rich

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
< Last | Next >
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles Walnut Creek, CA
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue Charleston, WV
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim Castleberry, FL
  • Excellent reply, and also very quick. Really sounds like the Expert knows what he is talking about. I will be back to use your service when I need more help with my RV. Dutch USA
 
 
 

Meet The Experts:

 
 
 
  • Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
< Last | Next >
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka-Moose)'s Avatar

    Chris (aka-Moose)

    Technician

    Satisfied Customers:

    846
    16 years of experience
  • http://ww2.justanswer.com/uploads/TE/TedG/2012-6-15_14759_avaLarge.64x64.jpg Ted G.'s Avatar

    Ted G.

    ASE Certified Technician

    Satisfied Customers:

    1596
    20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
  • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

    George H.

    ASE Certified Technician

    Satisfied Customers:

    1311
    ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
  • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

    Amedee

    ASE Master Tech

    Satisfied Customers:

    2367
    ASE Master Tech advanced level specialist
  • http://ww2.justanswer.com/uploads/SU/supermechanic/2013-8-23_03546_500.64x64.jpg Jerry's Avatar

    Jerry

    Master Mechanic

    Satisfied Customers:

    1906
    ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    942
    12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes
  • http://ww2.justanswer.com/uploads/ST/Steve7654/2012-6-5_215929_japic800x660.64x64.jpg Steve's Avatar

    Steve

    Auto Service Technician

    Satisfied Customers:

    1980
    25+ yrs experience as a professional working technician; ASE L1 master technician