(2007 Land Cruiser) I had the AHC Line from my Height Control Accumulator (Mounted Under Driver Seat on the Frame, USA) to the control valve box on the other side of the frame rail Fail due to corrosion. The Control Box has a electronic plug, and lines leading to the 4 accumulators at the hydraulic shocks/cylinders at each wheel and is electronically controlled. Seems to be I simple & well designed system..
There is also a feed line coming from the reservoir/pump assy to the Height Control Accumulator on the frame under driver seat. The failed line drained all the fluid from the reservoir. Luck for me I had just moved it from the house to the rear parking area when it failed. I added more fluid and turned the key to on and could hear the pump pumping as it normally does when I first turn the key on Just to check the pump. I unplugged the pump and drove it to my garage and put it up in the air where I noticed the source of the leak. The feed line from the Reservoir/pump was in good shape so I removed it to access the rusty fitting to the line going to the Control Box on the inside of the frame. I ordered a new short line to the Control Box after cutting off the old line. I also ordered a new Height Control Accumulator from Toyota. Removed the driver seat to access the Height Control Accumulator mounting bolts and replaced it and installed the new line from the Control Box and the line from the reservoir/pump. I now want to fill the new Height Control Accumulator . I have previously replaced the 4 accumulator spheres at the shocks/cylinder of each wheel a few years ago and blead them as many have by using the reservoir pump/key and height switch with no problem of course.. I have filled the reservoir and was going to start bleeding at the pump outlet and down to the bleeder on the new Height Control Reservoir. Before doing so I read some blogs. Everything I have read says you need the factory scan tool to override and run the pump, or get a electrical schematic and start jumping pins to do the same if you ever run the reservoir dry.... Does anyone have any information leading to the fact that this is the case or not.. Anyone know how I should proceed at this point??? Thanks...
There is also a feed line coming from the reservoir/pump assy to the Height Control Accumulator on the frame under driver seat. The failed line drained all the fluid from the reservoir. Luck for me I had just moved it from the house to the rear parking area when it failed. I added more fluid and turned the key to on and could hear the pump pumping as it normally does when I first turn the key on Just to check the pump. I unplugged the pump and drove it to my garage and put it up in the air where I noticed the source of the leak. The feed line from the Reservoir/pump was in good shape so I removed it to access the rusty fitting to the line going to the Control Box on the inside of the frame. I ordered a new short line to the Control Box after cutting off the old line. I also ordered a new Height Control Accumulator from Toyota. Removed the driver seat to access the Height Control Accumulator mounting bolts and replaced it and installed the new line from the Control Box and the line from the reservoir/pump. I now want to fill the new Height Control Accumulator . I have previously replaced the 4 accumulator spheres at the shocks/cylinder of each wheel a few years ago and blead them as many have by using the reservoir pump/key and height switch with no problem of course.. I have filled the reservoir and was going to start bleeding at the pump outlet and down to the bleeder on the new Height Control Reservoir. Before doing so I read some blogs. Everything I have read says you need the factory scan tool to override and run the pump, or get a electrical schematic and start jumping pins to do the same if you ever run the reservoir dry.... Does anyone have any information leading to the fact that this is the case or not.. Anyone know how I should proceed at this point??? Thanks...
