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Isuzu Trooper TOD and 4WD Problems

45 messages,  Last post on Nov 22, 2009 at 9:47 AM

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What is this discussion about? Isuzu Trooper, Transmission, SUV

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#1 of 45 2002 TOD and 4WD issues by boottmills Jan 04, 2009 (8:13 am)
I was wondering if anyone else is having issues with their Torque on Demand systems going into 4WD. The 4WD does not engage at all and the TOD display on my dash blinks at me for about 60 seconds and then the red "CHECK" light starts flashing at me. I know nothing about the TOD system and the 4WD does not engage into 4LOW when I do it manually either...any ideas? Replies to this message: chappe (Jan 05, 2009 11:53 am)
#2 of 45 Re: 2002 TOD and 4WD issues [boottmills] by chappe Jan 05, 2009 (11:53 am)
Replying to: boottmills (Jan 04, 2009 8:13 am) I was just seaching for a place to post this same exact thing!!! I am so frustrated!!! We haven't had snow all winter, finally when we get it, I can't get back up the hill as I have no 4WE. That light on the TOD display flashes red . I read in the owners manual that we should not drive the car in this situation. I drive a 1998 model. Anybody else? Thanks!
#3 of 45 1999 tod by claudiok Jan 05, 2009 (6:11 pm)
I had same issue and took to a trans shop. Started to talk to the guy and we became friends. He told me that the tod works with vaccum, and it unplugs, you can look at the front diff, there is a plate that cover a vacuum diaphrame and one of the hoses may be disconnected. That's what happened to my trooper. Replies to this message: chappe (Jan 06, 2009 2:55 pm) ectrooper (Jan 24, 2009 9:18 am)
#4 of 45 pruchased 1999 trooper 3.5 L performance (gas milage) by claudiok Jan 05, 2009 (6:21 pm)
Can anyone tell me if their is a difference in the 3.5l regular and the 3.5l performnace. I'm having fuel economy problems and don't know where to begin. the other thing is seams to have a small cap fuel tank. every time i fill up it only goes up to 18 to 19 gallon
#5 of 45 Re: 1999 tod [claudiok] by chappe Jan 06, 2009 (2:55 pm)
Replying to: claudiok (Jan 05, 2009 6:11 pm) Thanks Claudiok! I will have the vacuum hose checked. I appreciate it! Hopefully it will not be an expensive repair.   Best of good fortune in 09!
#6 of 45 TOD light by sparky39 Jan 16, 2009 (4:58 pm)
Maybe no big problem, but...99 trooper with new tranny and rear end, all works great but the rear wheel indicator light on TOD display does not light (front wheel indicator is fine). Could this be a bulb or something in the switch? Light actually stopped working before differential was changed and months after transmission was rebuilt. Any suggestion welcome.   Thanks, sparky39
#7 of 45 by brentb1 Jan 17, 2009 (2:59 pm)
if the check light is flashing(red)pull your codes yourself manually this will lead you in the correct direction.i have a 99 trooper tod and have been going through all this to.have learned a great deal on how and what to do so far.if the tod doesnt work(4wd high)shift into low and see if you have 4 low that will help isolate the issue also.let me know.. Replies to this message: sparky39 (Feb 07, 2009 5:36 pm)
#8 of 45 Re: 1999 tod [claudiok] by ectrooper Jan 24, 2009 (9:18 am)
Replying to: claudiok (Jan 05, 2009 6:11 pm) I have a similar problem. 2002 Trooper, 105k miles, just had trans rebuilt, now at 40mph or faster, when coasting (foot off gas pedal) the 4WD kicks in full 4WD (meaning all four wheel lights on dash are lit in full). It does not matter if TOD auto is on or off. Problem exists either way. I can hear and feel the 4WD kick in. If I just reapply the gas the 4WD disengages and goes back to original setting (TOD auto or 2WD). If I am breaking and the speed drops below 40mph then the 4WD disengages and goes back to original setting.   Could this be a vacuum problem? Others have said there is a breather on the transfer case, and that if the diff lock comes on while driving it could be the breather is blocked, causing some sort of pressure or vacuum inside the diff that activated the diff lock. The guy at the trans shop is puzzled, he thinks it is something electrical, perhaps a feedback sensor that passes through the trans that is telling the computer the rears are slipping and to go into full 4WD.   Any help is appreciated.
#9 of 45 Re: [brentb1] by sparky39 Feb 07, 2009 (5:36 pm)
Replying to: brentb1 (Jan 17, 2009 2:59 pm) Thanks for the help. I will try that tomorrow. The 4 wheel drive works fine it's just that the light no longer shows how much torque is going to the rear wheels. The light was okay till I had the wheel bearing on driver side replaced. The new tranny and differential seem to be fine, but the light bugs me! After spending so much I guess I just want everything to work. Glad to have help from someone with same trooper. Not many here in Connecticut. Thanks again...

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