? How could this happen if the solenoid/gate valves/leveling valves are supposed to be closed?
If I understand the reported sequence correctly:
New Pressure Sensor installed,
AHC Tank filled within 1” of the top,
Started engine,
Cleared existing DTC C1762,
Started Active Test,
Vehicle rose and...
Apologies offered to @suprasvobodea – my responses to requests on this Forum and in Personal Messages have been less than timely due to remote travels followed by illness, then some family issues and then other distractions.
Bottom line:
There are multiple issues here.
The fact that that the...
Generally the idea is equalise front end heights as close as possible with torsion bar adjusters (not Height Control Sensor adjusters -- impossible). The aim is to equalise the load carried by each torsion bar (assuming both are in similar condition) to avoid unequal suspension and steering...
Top of the line Toyota Land Cruiser Sahara vehicles marketed in Australia and manufactured in Japan were fitted with AHC/TEMS (same as LX470) only from Aug/September 2005 (the final "face-lift" version) until superseded by the 200 series in 2007. The lesser LC100 models marketed in Australia...
The Post #398 found at the link below provides an explanation of the "black clip" .....
https://forum.ih8mud.com/threads/the-abcs-of-ahc-how-to-measure-flush-and-adjust-all-in-one-place.1211999/page-20#post-14895892
This link leads to a relevant post -- it is a long read but it covers some of your issues, especially under the sub-headings "What to do next?" and "Some notes on so-called ‘over-riding’ of the “fail safe functions”...
Frustration+++ from @suprasvobodea and posts in two threads looking for advice. You already have learned a lot about the AHC/TEMS systems on LC100/LX470 vehicles. Here a few thoughts which may help you go further ….
Summarising the situation, as I understand it:
2002 LX470 at 230k miles, Texas...
There are a few threads that deal with a frozen linkage due to age and internal corrosion in that part of the linkage which is bolted to the top of the transfer case -- and what to do about it. In my case, the transfer case was dropped to gain access, others have cut holes in the floor to gain...
The FSM-specified AHC pressures are for the vehicle with no load, no passengers, no driver, no accessories, no fittings, fuel tanks full. The FSM is done this way because it allows the manufacturer to standardise the specifications.
However, all our vehicles are different and nowadays many are...
If new OEM AHC springs, then AHC pressures are function of the weight of the vehicle and the 'ride height' of the vehicle at the "N" height setting -- more weight than stock and/or more height than stock means more AHC pressure. If Rear AHC pressure is not sufficiently corrected by a spacers...
Intermittent C1713 combined with erratic rear height behaviour as described means a definite problem in the Rear Height Control Sensor circuit, meaning any of:
the Height Control Sensor, or,
the connector, or,
the harness.
The fact that removal and re-installation fixed the problem, at least...