Hello everyone.
Please can you help.
This is my first post.
My 2003 Range Rover goes up no problem. When it goes down, it does but light flashes to say it hasn't. I plugged a fault reader in and the voltage from the front left side height sensor is 54.50 volts and the rest are much lower and around the same. Also when I'm in off road position and go down, my fault reader says : carlift jack inhibit (yes.) Any help woul be great.
Thanks
Steve

What diagnostics are you using to get the fault codes etc?

Saint.V8 said:

What diagnostics are you using to get the fault codes etc?

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Think he may mean 54.50 bits. People really do need to up the info when asking a question.

wammers said:

Think he may mean 54.50 bits. People really do need to up the info when asking a question.

Click to expand...

Rare to get half a bit count!....I knew it was certainly not volts unless the decimal is in the wrong place, hence my query on what was being used to diagnose the system as they all spit out figures of different unit values...some in data, some in volts and others in physical mm heights.....

Saint.V8 said:

Rare to get half a bit count!....I knew it was certainly not volts unless the decimal is in the wrong place, hence my query on what was being used to diagnose the system as they all spit out figures of different unit values...some in data, some in volts and others in physical mm heights.....

Click to expand...

Was there not another one like this with crazy readings, never did find which diag was being used. Come on with half a story and expect a full fat answer.

Saint.V8 said:

What diagnostics are you using to get the fault codes etc?

Click to expand...

Hi Sorry didn't get back sooner, Problem with sky mail.
Right I'm using a icarsoft i930.

2003 l322 3.0d auto Range Rover
Hi Just checked details:
OFF ROAD POSTION
Left front: voltage 50.24 51.11mm
Right front: voltage 3.19 77.86mm
Left rear: voltage 1.74 57.89mm
Right rear: voltage 1.61 52.79mm
Reservoir pressure 9.28

Both rear and front passenger sensors are new. ( this fault was the same before sensors)
When I ask to go in off road great, goes straight up, ask to go down.
Light flashes to say its going down, but light does not go on solid . ( when I'm on i930 it says carlift jack inhibit (yes.) when are turn from off road any lower)
RR Does seem very low.
What should they be.

Thank you every one for help
Steve

Hi everyone, can anyone help PLEASE
Is there any idea what is wrong with my RR, don't really wand to take to dealer.
Thanks Steve

The L322 has a system that you can set using diagnostics to freeze or inhibit the system if you are going to jack the car up and let the wheels dangle....as the ECU will shut the system down if the articulation goes beyond 350mm and the system can't lower this value...the ECU thinks the car is being lifted and freezes.

Now, let us suppose the car is off road, and you park over a large rock, you then set the system to go down to access height, but the car grounds out on the rock, the system will detect that it hasn't yet reached access height but the height sensors are not feeding back that the vehicle is lowering anymore...the ECU thinks the car has grounded out on something and will attempt to raise the vehicle back up again to prevent damage.

It would be similar when you jack the car up - the ECU thinks the vehicle has gone into an attitude it doesn't expect and as such will freeze or disable the EAS system.

I am thinking the i930 report of carlift jack inhibit is just a setting you can change to freeze the system when you lift the car up to stop the ECU going nuts!

As for the height readings listed and if they are correct I don't know as I have little knowledge of the way the i930 reports vehicle height settings.

I'd suggest you get the tape measure out and physically measure the vehicle and see how it compares to these measurements:



As this is were the car should be sitting when it works correctly.

My thoughts initially are that your height sensors are not reporting the height correctly to the ECU when the vehicle is lowering so the ECU disables the system thinking it is grounded on something....either that or the valve block isn't opening the valves correctly preventing the car from lowering - which would seem strange in both cases as you say the car goes up alright.

The L322 did suffer from valve block exhaust blockages which could prevent the vehicle lowering correctly.....I think the exhaust is in the air compressor housing in the boot....take this off and have a look....do a google search for the fault as I think it was quite common.

Saint.V8 said:

The L322 has a system that you can set using diagnostics to freeze or inhibit the system if you are going to jack the car up and let the wheels dangle....as the ECU will shut the system down if the articulation goes beyond 350mm and the system can't lower this value...the ECU thinks the car is being lifted and freezes.

Now, let us suppose the car is off road, and you park over a large rock, you then set the system to go down to access height, but the car grounds out on the rock, the system will detect that it hasn't yet reached access height but the height sensors are not feeding back that the vehicle is lowering anymore...the ECU thinks the car has grounded out on something and will attempt to raise the vehicle back up again to prevent damage.

It would be similar when you jack the car up - the ECU thinks the vehicle has gone into an attitude it doesn't expect and as such will freeze or disable the EAS system.

I am thinking the i930 report of carlift jack inhibit is just a setting you can change to freeze the system when you lift the car up to stop the ECU going nuts!

As for the height readings listed and if they are correct I don't know as I have little knowledge of the way the i930 reports vehicle height settings.

I'd suggest you get the tape measure out and physically measure the vehicle and see how it compares to these measurements:

As this is were the car should be sitting when it works correctly.

My thoughts initially are that your height sensors are not reporting the height correctly to the ECU when the vehicle is lowering so the ECU disables the system thinking it is grounded on something....either that or the valve block isn't opening the valves correctly preventing the car from lowering - which would seem strange in both cases as you say the car goes up alright.

The L322 did suffer from valve block exhaust blockages which could prevent the vehicle lowering correctly.....I think the exhaust is in the air compressor housing in the boot....take this off and have a look....do a google search for the fault as I think it was quite common.

Click to expand...

Thanks so much, I will measure in the morning.but mine a way lower than that.
As fir the i930 when doing live data, and I move button to lower,
5 seconds and it says carlift jack inhibit and goes from no to yes.
Thanks again
Steve