How to disable AHC dash light?
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This is a customers vehicle and since this one we've seen a few dozen others... I can't honestly remember what wheels it has. 
I think the sliders are MetalTech.
I think the sliders are MetalTech.
Hello from Australia.
Have a 2006 Sahara HDJ100R and when bought the AHC pump was already removed and normal suspension installed. Not sure what has been done by previous but cannot find the AHC ECU under the dash either side. Thinking this unit has already been removed as the VSRG and traction work with no alarm lights on the dash. Does anyone have a picture of this unit for RHD?
All the sensors are still fitted to the A arms and hydraulic lines still intack.
Question ?? If i remove these sensors will i have alarms??? The height adjuster is still in the console, if i remove that will sadness prevail?
Thanks.
Have a 2006 Sahara HDJ100R and when bought the AHC pump was already removed and normal suspension installed. Not sure what has been done by previous but cannot find the AHC ECU under the dash either side. Thinking this unit has already been removed as the VSRG and traction work with no alarm lights on the dash. Does anyone have a picture of this unit for RHD?
All the sensors are still fitted to the A arms and hydraulic lines still intack.
Question ?? If i remove these sensors will i have alarms??? The height adjuster is still in the console, if i remove that will sadness prevail?
Thanks.
Hi Kurt - sorry to dig up such an old thread...I'm getting ready to swap out the AHC for an OME setup on my 06 LX. Are you saying just pull the AHC ECU, Leave the fuses? Will I still have VSC and Telescoping steering wheel? Just want to get the AHC out and still have a reliable rig. Thanks!
Ditched my AHC system on my 2000 LX470 so I thought I would post a couple of pictures of the AHC plug for people who want to get rid of the flashing light on the dash.
Here's a picture of the ECU (located just above the accelerator pedal) and the plug:
It is really tight quarters in there, and I couldn't fit my hand in there to get a good enough grip on the plug so I used these locking needle nose pliers to clamp down on the length of the plug and then wiggle it out:
Here's a picture of the ECU (located just above the accelerator pedal) and the plug:
It is really tight quarters in there, and I couldn't fit my hand in there to get a good enough grip on the plug so I used these locking needle nose pliers to clamp down on the length of the plug and then wiggle it out:
I unplugged both plugs, now I have lights on all of the time on my dash. Didi you unplug the top or bottom plug on the ecu? they look the same.
I disconnected the plug closest to the floor of the truck. I don't recall unplugging a second plug.
What lights are you getting?
Gracias @SoCal Dan
Thanks @AlabamaLX! Just did a conventional suspension swap on my 2006 LX. Had the lights start blinking at me driving home yesterday evening. Your fix seems to have killed the "flashing OFF" AHC light, as well as the H-N-L AHC indicator lights and the outline of the truck. Exactly what I wanted to do!!
I do have the VRGS flights flashing but that should go away after a quick test Drive. BTW, the AHC ECU location is above the gas pedal as well on my 06 LX. It was the lower plug as well. AHC plugs face the driver seat, had to pull the AC vent off to get to it. Ill report back with any issues I run across to this thread.
Thanks again
Can someone confirm that this is all that's necessary to eliminate AHC dash light? Why are some people saying to touch fuses, etc.?
A few months late @Kabanstva , but I just pulled the lower AHC CPU plug on my LX470.
I left the 20A and pulled the 50A fuses.
VGRS lights up then turns off after all the idiot lights initialize as it should. So apparently it's working fine.
I thought pulling the CPU plug would just turn off the height indicator light. Nope....it killed the entire AHC display. It's as if my LX470 was never equipped with it.
Nice!
I haven't started it yet, the battery went flat while installing the lift. It's charging now.
I left the 20A and pulled the 50A fuses.
VGRS lights up then turns off after all the idiot lights initialize as it should. So apparently it's working fine.
I thought pulling the CPU plug would just turn off the height indicator light. Nope....it killed the entire AHC display. It's as if my LX470 was never equipped with it.
I haven't started it yet, the battery went flat while installing the lift. It's charging now.
Thanks. Any specific reason you pulled the 50A fuses while others say to not touch them because it affects the VSC system? It’s so weird that everybody is doing something different.
AHC Removal - Fuses vs ECU
forum.ih8mud.com
When I recently did this, my final result was pulling the under hood 50a fuse, out of extreme paranoia (to disable the pump), and the lower 2 connections to the AHC ECU, to get rid of the lights and make the AHC computer "go away" in TechStream, the 2 AHC fuses under the dash were left in place.
I'm still tuning and tweaking the suspension to get it how I want it, but I've observed no ill effects with VSC or any other electronics after ~4 months of running it like this.
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I'm a bit late again. If I remember right, I undid the 50A because it went to the AHC pump. I undid the under dash CPU plugs (which were a pain to get to with the interior in place, but possible) because that got rid of the dash light and made it look stock.
I eventually used the 50A underhood fuse location to connect up my Kenwood mv71a ham radio. It made installation very easy.
I'll have to re-look at the wiring diagram to decide why I left the 20A fuses. I've had zero effects from ABS, ATRAC or VSC, they have all worked and been tested in one way or another on my various trips this year.
I eventually used the 50A underhood fuse location to connect up my Kenwood mv71a ham radio. It made installation very easy.
I'll have to re-look at the wiring diagram to decide why I left the 20A fuses. I've had zero effects from ABS, ATRAC or VSC, they have all worked and been tested in one way or another on my various trips this year.
Bringing this back to update with my “remedy”.
I reviewed the wiring and the “off” signal goes through connector IU2. I just focused on that since it’s all I need at the moment.
Drop your glove box and you will see the IU2 connector on the right.
For my 99 LX, the middle black w/ red wire was the signal so I cut it.
I haven’t removed the height sensors yet but I might feed a steady signal to keep it in “HI”.
Only tool needed was a pocket knife. Just tape it up when done.
I reviewed the wiring and the “off” signal goes through connector IU2. I just focused on that since it’s all I need at the moment.
Drop your glove box and you will see the IU2 connector on the right.
For my 99 LX, the middle black w/ red wire was the signal so I cut it.
I haven’t removed the height sensors yet but I might feed a steady signal to keep it in “HI”.
Only tool needed was a pocket knife. Just tape it up when done.
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Hate to bring this old thread back up, but I wanted to check with you to see if years later, this was indeed the fix with no other issues discovered later.
