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  1. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    IDK no if issue covered in thread. Perhaps a search of thread for "FUSE", would be helpful! Could a pump pull to many AMPs, and blow a fuse. Short answer YES! But I've not seen this personally, on a 100 series. I have seen a fuse blow, from a motor being over-worked. But it was actually, a...
  2. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    "Death wobble": Most times when we get "death wobble", it's a blown globe. By driving ~30MPH over a speed bump, one tire at a time. We can isolate blown globe. We feel "death wobble" on blown globe tire/shock. Good globe's tires/shocks, go over bump with normal suspension feel.. Front sensors...
  3. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    3hr to R&R 1 damage (nut) globe, plus flush! Not bad. If the nut of globe unusable. Chain wrench likely to difficult to get on and stay on.. I do not see "why" if not rusted, you're having these issues. Other than not getting wrench on fully and squarely. These globes just aren't that tough...
  4. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    WOW, must be rusted to the frame!
  5. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    I suppose taking to Dealership is and option. But if you want to give another shot, at removing the stuck globe today. Harbor Freight has a forged open end wrench set. I use the 36mm form the kit. It's a very tight fit, so I tap wrench onto the globes nut for a very secure fit. Than for added...
  6. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    New globes should not changes either cross level or sensor (height). But pressure may change. Unless you had changed/adjusted the sensors. In which case, I'd read the pressures, after bleeding air from system. Than I'd adjust rear sensor, to get near ~6.2Mpa rear. When happy with rear pressure...
  7. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Let's not change the current thinking of frt 19.5" & rear 20.5" just yet. But I would not like to see people changing factory set height sensor, trying to reach those measurement. For one if they move height sensor to raise the rear, which is a sensor lift. Then rear Mpa (pressure) goes up, we...
  8. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Something I see time and time again in mud. With respect to axle center to fender lip measurements: front 19.5: rear 20.5". I see ~ 5/16" lower, time and time again. I've measure more than my share of pure stock, no accident, no signs of height sensor adjust. I see: front 19 3/16, rear 20...
  9. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    OH S**T! You got gel from a 2.5L tin can. Toyota/Lexus very quietly reverted back to the tins. Never issuing a bulletin about gel from plastic bottles. You're first I read found gel, in other than the 1 L plastic bottle. Have you heard/read of others with gel from a 2.5L tin?
  10. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    A few thoughts on heights: The only thing I've found different over the years. Is measurement (inches) when using the @PADDO method axle to fender. I've got a mark on my tape measure at just over 19 3/16. Factory stock (tire 29 PSI frt, 32 psi rear, full tank of gas, 3rd row in), AHC flushed &...
  11. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Yeah if not cross level in front, rears will not be cross level either. There is a way to measure height of vehicle, which a bent body or old body mounts will not effect! It's in the FSM. Which has us measure points from ground up to spindle frt /axle rear & control arms. But to get...
  12. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    "-I went the “putz” route and used spring compressors for the LH coil spring. Not that it was better, I just didn’t want to disconnect anything else. In hindsight, disconnecting the brake line bracket and diff breather may have been faster. YMMV on what you choose to do. -I didn’t need a jack to...
  13. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Were the ball joints of sensor arm frozen in place?
  14. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    I saw something like this, kind of! It was when I was testing AHC CPU with the older CPU 89290-60020 from 1998-99, in a 2001 that called for 89290-60021. I'd see the number of DTC as reported in AHC Data stream would double to 4, from the actual 2 DTC it did have. I could not open Trouble Codes...
  15. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    I do agree, it would seem this wire block housing had some part in the failure of AHC. Good Idea Andy, replacing the connectors. For now, we're going to see how the system behaves as is. It may be best to just replace the harnesses :hmm: I would have like to test resistance of all wires, that...
  16. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    The post I've read. The AHC pump failed very fast, or as soon as started up after flush.
  17. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    I've got it working again! :) :hmm: To answer your question Andy. I did check the continuity of accumulator and it's wires. I also the controller and it's wires. I've now checked continuity from CPU (new/used AHC CPU, which test good) to rear 1/4, and on to rear height sensor, accumulator and...
  18. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Thanks @Moridinbg. I've followed you thread on your frame off restoration. Kudos to you my friend, it is some great work you've done! Love the pictures. They are really helpful, for me to visualize. So I should be able to check continuity between CPU and the wire housing blocks (plug) at rear...
  19. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Thanks Andy! That is what i'm thinking. Thanks! @Moridinbg I'll try it today. Guys; I know the motor runs strong, as I jumped it. This will help me confirm the pump is also working okay, and fluid is building pressure all the way to shock/globes. With so much bad fluid (jelling) around...
  20. 2001LC

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    @uHu @IndroCruise @suprarx7nut @PADDO anyone? Would running the pump motor, via a jumper from 12 volt battery. Raise the vehicle from L, when AHC flashing off on dash (in fail safe mode)? I'm wondering if the "controller" may close a valve during fail safe, block any fluid from entering or...
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