Hi, thanks for the forum. I just picked up a rust free 2005 LX470 with 192k miles. Unfortunately there will be some work done to get it baselined. I did not have a chance to personal inspect it before purchase and was under the impression the AHC was good. But today I found out the AHC does not function as it should and then realized the fluid is very low. I did searched the forum and was not able to find someone have exact same situation.
Here is a rundown of the actions and how I found the issue. I change to AHC to Hi with parking break up and close the door, me outside the truck. The truck went up, then I began to hear some squealing noise coming from the under of the truck, not sure exactly where the sound come from (the sound is a little like the sound of an oil serpentine belt, but it is lower). Then the sound was gone, and the truck began to come down automatically from high. Then I see the AHC Off light begin to blink and the AHC light changed from H to N. I opened the door and changed the AHC to LO, closed the door and me outside the truck. The car would not go down and the OFF light keep blinking. I tried to click the AHC off button, and it did not work. Then I checked the AHC fluid. The fluid is at about 4th - 5th lines from the bottom of reserver (the truck is at N height). I removed the cap and the filter, the color of the fluid is brown. Per the previous history, I don't see a record that the AHC was serviced in it's life.
Here is my thought process on next steps.
1. Fill the reserver with AHC fluid to Max
2. Test the AHC again to see if the Off light is still blinking or if this fix the issue.
3. Examine if any leaks in the AHC system if it still not fix the issue.
I believe I would need to get the AHC functional first, then I can see the difference of the fluid level from H to L to determine how well the function is. Then I can go from there to see what the next step will be with existing posts from here.
Any suggestions on the testing or I should do it another way, I would highly appreciate it.
Some pics of the truck undercarriage.
Here is a pic of the AHC reserver.
Here is a rundown of the actions and how I found the issue. I change to AHC to Hi with parking break up and close the door, me outside the truck. The truck went up, then I began to hear some squealing noise coming from the under of the truck, not sure exactly where the sound come from (the sound is a little like the sound of an oil serpentine belt, but it is lower). Then the sound was gone, and the truck began to come down automatically from high. Then I see the AHC Off light begin to blink and the AHC light changed from H to N. I opened the door and changed the AHC to LO, closed the door and me outside the truck. The car would not go down and the OFF light keep blinking. I tried to click the AHC off button, and it did not work. Then I checked the AHC fluid. The fluid is at about 4th - 5th lines from the bottom of reserver (the truck is at N height). I removed the cap and the filter, the color of the fluid is brown. Per the previous history, I don't see a record that the AHC was serviced in it's life.
Here is my thought process on next steps.
1. Fill the reserver with AHC fluid to Max
2. Test the AHC again to see if the Off light is still blinking or if this fix the issue.
3. Examine if any leaks in the AHC system if it still not fix the issue.
I believe I would need to get the AHC functional first, then I can see the difference of the fluid level from H to L to determine how well the function is. Then I can go from there to see what the next step will be with existing posts from here.
Any suggestions on the testing or I should do it another way, I would highly appreciate it.
Some pics of the truck undercarriage.
Here is a pic of the AHC reserver.