Question about 2002 Isuzu Trooper

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2002 ISUZU TROOPER, TOD CHECK LIGHT IS FLASHING, NOT THE CHECK ENGINE LIGHT. TOOK IT TO ADVANCED AUTO AND THEY SAID THEIR MACHINE ONLY READS CHECK ENGINE LIGHT DOES ANYONE KNOW WHAT THIS MEANS? EVERY THING SEEMS TO BE RUNNING AS USUAL OTHERWISE. CAN I DRIVE IT LIKE THAT?

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  • la44y Jan 20, 2010

    AS I STATED IT IS NOT THE CHECK ENGINE LIGHT! IF YOU READ IT IS THE TOD CHECK LIGHT IT IS ON THE DASH IN BETWEEN THE BACK TWO TIRES. TOD DIAGRAM WHERE THERE ARE FOUR WHEELS THAT CAN LIGHT UP TWO ARE USUALLY LIT WHEN I AM IN 2WD ALL 4 LIGHT UP WHEN I AM 4WD.

  • la44y Jan 20, 2010

    THANKS ALOT, JOE!! THAT WAS THE KIND OF ANSWER I WAS LOOKING FOR! YES, I CAN DRIVE IT AND IT DRIVES GREAT AS USUAL IT IS JUST THAT LIGHT KEEPS ON FLASHING. I DO HAVE 102,000 MILES ON IT. DO YOU THINK I CAN DRIVE IT UNTIL FRIDAY WHEN I GET PAID TO FIX IT? I TRULY APPRECIATE YOUR ANSWER. SINCERELY, MARCIA

  • la44y Jan 20, 2010

    THANKS JOE! THAT IS THE KIND OF ANSWER I WAS LOOKING FOR! SHORT AND SWEET! I SINCERELY APPRECIATE IT!

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  • Master
  • 10,865 Answers

Hello. TOD is an acronym for Torque On Demand. Basially it uses your vehicle computer to adjust the torque on the front wheels while in four wheel drive so that you can use four wheel drive on paved roads as well as on dirt roads or snow. If you wish to know more than most about TOD go to this site: http://www.moncha.com/vx_tod.html
Can you drive with the TOD light on, yes. Some folks drive like that for years.
Contrary to the clerk at advanced auto, you can scan the computer to find out what the issue is. Most often, the fix to your problem is:

1. Install a new four wheel drive switch or;
2. Install a new set of speed sensors (there are two).
If your vehicle has more than 60,000 miles on it, I would do both 1 and 2. Regards, Joe
PS kindly rate my answer. thank you.

Posted on Jan 20, 2010

  • Joe Hogan Jan 20, 2010

    Hey there Marcia..... thank you. Absolutely you can drive it. Regards, J.

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  • Contributor
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I have the same issue but didnt show up till i had trannsmission rebuilt any help would be great.
all worked good untill new trannsmission was put in . could it be pinched or broke wire.

Posted on Mar 01, 2015

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  • Isuzu Master
  • 17,970 Answers

If you can tell us more details about the figure (graphics) of this warning signal, maybe can tell you details. Check your owner manual about instruments panel and signals (if you have it).

Sometimes any lights just are one remember about date for service, or service reminder. When the warning signals are RED, you need stop runing the car and check for the dealer or workshop.

Visit Autozone for free read codes.

Check Engine Light Tips
1. The Check Engine light tells you the computer found a problem with your vehicle's running condition.
2. If the vehicle is driving OK, a Check Engine light is not a reason to pull over. But get the problem fixed soon.
3. In testing areas, you will fail your emissions test if the Check Engine light is on.
4. Fuel economy generally suffers when the Check Engine light is on.
5. An extended warranty covers emissions-related components that can trigger the Check Engine light. More information is at: epa.gov/obd/warranties.htm.
6. When the Check Engine light is on, one or more "trouble code(s)" are stored in the computer.
7. You can read and erase trouble codes using inexpensive code-reader tools from auto-parts stores; the tools are very easy to use.
8. The problems identified by the codes are frequently easy to fix (such as a loose gas cap), but some are complex, requiring professional diagnosis.
9. A trouble code indicates a circuit where the problem was identified, not necessarily the component itself. Diagnosis is often necessary.

Commons reports tell us that vacuum solenoid-valve problems might cause the 4WD lamp to illuminate while in two-wheel-drive mode, or Alternator with fault.

Hope helps.

Posted on Jan 20, 2010

  • ZJ Limited
    ZJ Limited Jan 20, 2010

    There are only three components that are possible to fail in this
    system:
    1) The TOD computer
    2) The viscous coupler (clutch) inside the
    transfer case
    3) The speed sensors on transfer case.

    The
    clutch in the transfer case almost never goes bad, and would be a lot
    more major to fix, so start with the easy stuff. Other users replaced
    his computer with a known working computer, still didn't fix the
    problem.

    Also then bought new (used) speed sensors and installed them.
    Problem didn't go away.

    Then checked every single electrical
    connection in the system, didn't fix it. Installed another known
    working set of speed sensors (there are two), and that fixed the
    problem.

    It seems like this is the most common reason for failure of
    the TOD system. I haven't located new speed sensors for mine, but I'm
    fairly certain that is the problem. You can verify by pulling the codes
    using a code reader, or a simple test light (the code reader is a much
    easier way and most auto parts stores will run the codes for you).

    Good luck.


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2 Answers

How do i make the TOD check light stop blinking


This indicated that some problem in transmission gearbox or gearbox harnees

Feb 14, 2015 | 2000 Isuzu Trooper

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Aug 20, 2011 | 2001 Isuzu Trooper

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Have a local shop or auto parts store perform a "Fault Scan" - Most good auto parts stores will do it for you for FREE. They read the codes, print out what is wrong and reset your lights.

Jan 05, 2011 | 2001 Isuzu Trooper

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On my 1999 Trooper TOD is flashing and the red Check light is flashing. We just had a large amount of snow and I used the 4 Low to get out. That is when this started..


I am not sure what the problem is, but I do know if the check engine light is red, and flashing it indicates that whatever the problem is it's DOING DAMAGE. I don't recommend starting this vehicle until the problem is solved.

Dec 13, 2010 | 2001 Isuzu Trooper

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I have an 02 Trooper with 128,000 miles. Recently I noticed my TOD check light flashing. It gave me codes 13,14,24. What should I be looking for?


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Sep 13, 2010 | 2001 Isuzu Trooper

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Check light on dash panel under the torque on demand diagram and where do i add transmission fluid


I have the same problem with my '98 Trooper - the TOD light, that is. Took it to a good shop for diagnosis. They said the TOD sensor was bad and it would cost abot $480 for the part. We were looking at a hefty bill, so decided to do without TOD for now. Manual 4WD still works fine. They said that Isuzu's arrogance that the transmission wouln't leak leaves us with a tiny 1/4" check port to fill through. We got concerned enough, and had over 180,000 miles, that we took it to a transmission shop and had it flushed and refilled correctly. To be honest, we now have 230,000 miles and don't really see any ATF leaks.

Jul 01, 2009 | 1998 Isuzu Trooper

2 Answers

Tod problem


check the sensor under truck on the front of transfer box... if tod is not lite up on dash check relay and fuses

Dec 29, 2008 | 2002 Isuzu Trooper

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