04 Ltd V8 Air Suspension Problem

[Brady]

Toyota Canada is doing nothing for me but the service manager at the dealership offered to kick in 20% so... They're going to retest the height sensors before replacing the ECU, since the sensors are usually the problem - there's a TSB or tech tip related to it. Usually Runners come in jacked up or low riding, they do a sensor and it's fixed, but mine seems to be riding level so its probably the ECU, we'll see

 

[4x4v8]

Toyota Canada is doing nothing for me but the service manager at the dealership offered to kick in 20% so... They're going to retest the height sensors before replacing the ECU, since the sensors are usually the problem - there's a TSB or tech tip related to it. Usually Runners come in jacked up or low riding, they do a sensor and it's fixed, but mine seems to be riding level so its probably the ECU, we'll see

Any updates? Mine is now in the super up position and I dont want to pay 100s of dollars to fix something that seems faulty.

 

[Bossman]

Although this rear air suspension option seems like a good idea from an automotive engineering point of view, my real world experience has been less than satisfactory.

My real world is Canada ... northern Ontario to be specific ... where snow/ice covered roads in the winter months are covered with road salt. This salt corrodes our vehicles' frames, body panels and other exposed parts.

In my case, the exposed part was a sensor for this air suspension system. The salt got to it and corroded it, causing the air suspension to fail. The failure resulted in the rear end being jacked up to the limit (like a hot rod at a drag strip!). Every little bump in the road shock my whole body while driving.

And of course repair/replacement of this system and/or its associated parts is expensive.

I have not replaced the corroded sensor, and have had the electrics of the air suspension "re-wired" so that it can still function to give me the suspension that I need.

Neat idea ... but poor reliability/dependability in my driving world.

 

[shrack]

Although this rear air suspension option seems like a good idea from an automotive engineering point of view, my real world experience has been less than satisfactory.

My real world is Canada ... northern Ontario to be specific ... where snow/ice covered roads in the winter months are covered with road salt. This salt corrodes our vehicles' frames, body panels and other exposed parts.

In my case, the exposed part was a sensor for this air suspension system. The salt got to it and corroded it, causing the air suspension to fail. The failure resulted in the rear end being jacked up to the limit (like a hot rod at a drag strip!). Every little bump in the road shock my whole body while driving.

And of course repair/replacement of this system and/or its associated parts is expensive.

I have not replaced the corroded sensor, and have had the electrics of the air suspension "re-wired" so that it can still function to give me the suspension that I need.

Neat idea ... but poor reliability/dependability in my driving world.

How did you re-wire the electrics? Any help is appreciated.

 

[Bossman]

How did you re-wire the electrics? Any help is appreciated.

Well, I personally did not do the electrical modification, my trusted mechanic at my local Toyota dealership did it.

I no longer have true "height" control using the factory controls in the centre console.

All I can do is air up the air suspension if it is getting low. I no longer have control of releasing air from the system. So I can not lower the air suspension using the inside controls.

If I really need to dump air out, I would have to do it manually by bringing it back to my mechanic.

The big issue for me was having air in the system to prevent me from riding on the rear axle.

 

[foreigner]

Similar Issue

Hey Guys,

I have a similar issue as to what a few others have posted. Last month while I was having some work done on my exhaust, they hit one of the air lines with the torch and melted a hole in it. When I left the shop the car was bouncing everywhere. I brought it back in and they noticed the hole so they replaced the line. When I left the shop again it seemed the way it should be. But a few people have asked why the ride is so rough since the incident. After they said that I definitely started to notice it.

I can both raise and lower the rear with the switch, but when I start to drive around the Neutral light starts to flash and eventually goes into Neutral. Does this mean there is a problem? Or should I be able to drive around with the car raised and lowered? Something is telling me there is a problem and is the reason why it rides so rough now.

Thanks

 

[Mark86]

It is normal operation. Once the truck reaches a certain speed (around 20 mph), it is supposed to automatically return to the neutral position. The bumpy ride could be a sign of a ride height sensor breaking. This occurred on my truck after my dealer lifted it without turning the ride height off. The truck is supposed to adjust the rear height according to weight. Lifting without turning the system off is bad!

 

[nene86]

my air suspension broke down

since the cost to repair it was 3k from toyota i decided too do the suspension conversion kit
Hi guys i am new user of the site i do apologize in advance if I didn’t put my question in the right thread i have a 4runner 2005 automatic since the rear air suspension broke down just recently i decided to converte to the spring suspension by removing the air shocks disconnecting the compressor and removing the fuse and the relay however after doing everything according to what i have read now the car won’t drive when i put on drive or reverse it doesnt move it is as if it has a safeguard since i did the conversation would anybody be able to help me out figure what i have done wrong or has had something similar happen to them? I do appreciate and thank you in advance for taking the time to read and answering any help would be much appre

 

[CookieRoe]

since the cost to repair it was 3k from toyota i decided too do the suspension conversion kit
Hi guys i am new user of the site i do apologize in advance if I didn’t put my question in the right thread i have a 4runner 2005 automatic since the rear air suspension broke down just recently i decided to converte to the spring suspension by removing the air shocks disconnecting the compressor and removing the fuse and the relay however after doing everything according to what i have read now the car won’t drive when i put on drive or reverse it doesnt move it is as if it has a safeguard since i did the conversation would anybody be able to help me out figure what i have done wrong or has had something similar happen to them? I do appreciate and thank you in advance for taking the time to read and answering any help would be much appre

This link might help ya. Some folks talk about some setting that the vehicle won't drive in.

http://www.toyota-4runner.org/4th-gen-t4rs/19448-rear-air-suspension-off.html

Hope this helps!

 

[dave82at]

Hi Guys, I am having a similar issue. Sometimes during driving the 4runner would lower down a bit and then the pump comes on and pumps it up again (all this happens on the driver side only). Then sometimes when I turn off the truck all the sudden the driver side just drops down and I can hear the air releasing.
I will exchange the air bag on the driver side, but now I think it might be the dump valve or an electrical issue. Anybody has a electrical/pneumatic sketch?

Has someone else had the same issue?