Techstream error- will not read AHC and other tests
- Thread starter SWCruiser
- Start date
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Clear the error code and see if it returns. You had your front wheels straight when you read your pressures?
Sent from my iPhone using IH8MUD Forum
Clear the error code and see if it returns. You had your front wheels straight when you read your pressures?
Sent from my iPhone using IH8MUD Forum
Both (front and back) at 10+ reading?
Your '06 rig is quite young. My logic tells me that both front and rear would have different readings, not same numbers. Unless TBs were really loosened out over time and the springs has gone very saggy.
Did you start the reading from L to N (height control)? And like PADDO said, clear the code. This may be the culprit.
- Thread starter
- #46
Yes. They aren't the same reading exactly. I have the ahc override and diff. Drop. I only moved the torsion bar bolts two turns on each side. it seems like the front has had trouble staying up. Suspension goes up and down fairly easy and had correct fluid movement last time it was check. I did go from L to N. I will try to clear the code.. yes the front wheels were straight. I thought I read the AHC springs last about 7 years. My rig has 130 k mostly highway miles. May have seen some towing also. I bought is when it had 120 k.
Readings of 10+ Mpa front and rear are pretty high for a stock height/weight vehicle. Your not confusing the height accumulator reading (usually around 10.5Mpa) with rear are you? And how did you determine a height sensor was defective, you can expect a few mm variation between the fronts. FWIW I'm still on original coils at 135k miles with 15mm spacers, my rear pressure has finally crept up to 6.7 so I'll be changing them out soon.
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What change did you see when you said you've cranked TB's two turns? Should have at least gone down with your readings? Have you checked whether your 30 mm bolts are within spec? Then start from there. Check out --https://forum.ih8mud.com/threads/adjusting-torsion-bar-with-ahc-questions.677799/#post-9261286 with post #9.
I tow few times a year but not too heavy on the tongue though. I also have teenager passengers (sometimes 5 or 6) in the back quite often. I'm at 6.9 for the rear. 146k and still with original coils.
I tow few times a year but not too heavy on the tongue though. I also have teenager passengers (sometimes 5 or 6) in the back quite often. I'm at 6.9 for the rear. 146k and still with original coils.
- Thread starter
- #50
I cranked them before checking the pressure so I'm not exactly sure. I didn't check to see the bars were within spec. I will do that. Thanks for the information. I think it's good for everyone to have data points on usage of the ahc and durability.
My mvci echstream does work with 1996 rav4
- Thread starter
- #52
An update. I replaced the right rear globe with a functional used globe. Did a full ahc drain and fill and swapped in the springs. I also cranked down on the torsion bars.....Man were those way off!. After all these things the front pressures seemed to be perfect. The rears however would stop working correctly after going into high... after much deliberation and explicatives I decided to pull of the spare as there was some rubbing on the rear suspension bar.... things seemed.to be working perfectly after this for a 150 mile drive and then all of a sudden I start getting the harsh ride from the rear again. .
uHu
Bridgeburner
It may cause deactivation of the air suspension
X2. Height sensors have finite life spans. Check the linkages are free and not bound up, you can open and clean the contact surfaces within too to buy a bit more time. If a height sensor is sending spurious feedback to the ECU while in motion you may well be getting random leveling signals to the front or rear resulting in increased pressures that are making the ride more harsh. Set your vehicle to N and turn off the AHC, it will stay off and won't try and self level while you drive, as long as you are under 50mph. You will still have damping control with AHC off but without the self leveling and height feedback. This may help to isolate the problem back to a failing height sensor. Above 50 mph it will turn itself back on and do its leveling thing. As uHu pointed out, any random or intermittent height/leveling issues and you should suspect a height sensor issue.
Little hi-jack ....
Went on Ebay/Amazon to purchase Tech stream to get involved and found many versions.
With pricing from mild to wild.
will all the choices
V7.xx.xxx
V8.xx.xxx
V9.xx.xxx
Whats a non tech brother to do???
Thanks
Went on Ebay/Amazon to purchase Tech stream to get involved and found many versions.
With pricing from mild to wild.
will all the choices V7.xx.xxx
V8.xx.xxx
V9.xx.xxx
Whats a non tech brother to do???
Thanks
- Thread starter
- #60
I got the one below. First cable was DOA but replacement works great.
http://www.amazon.com/dp/B00C9B32J4/?tag=ihco-20
http://www.amazon.com/dp/B00C9B32J4/?tag=ihco-20
