Air suspension fault range rover 3.6 sport

We fitted air compressor pump to a 2008 range rover 3.6 diesel sport and now the suspension is sitting up and when you try to put it down it says suspension fault

Mack1966 said:

We fitted air compressor pump to a 2008 range rover 3.6 diesel sport and now the suspension is sitting up and when you try to put it down it says suspension fault

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Hi

Does the compressor run , have u checked you’ve plugged the reservoir valve block back in

Plse check fuse F26 under the bonnet, don’t know if it’s the same as my D3

Plse let us know how u get in as I believe the suspensions set up is the same as my D3

Ps, did u disable the suspension before hand , either pulling a fuse, battery disconnect or by diagnostics

Will try and help all I can

I don't think the mechanic did disable it.if he didn't do you know how we would proceed from here.many thanks for your help

Just found out he didn't disable the suspension

Mack1966 said:

Just found out he didn't disable the suspension

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All costs from here on are covered by his professional insurance then?

If only lol

Mack1966 said:

Just found out he didn't disable the suspension

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Hi

Thks for the data , so now we know he didn’t disable it , did he also jack the vehicle up by any chance please

Will help all I can

First is to ensure the compressor runs, where ur suspension height lever is, as u press it up or down do u get an orange light next to the lever as u move it

Is it down on its bump stops or off road height

Sorry for all the questions, just so I can try and work out what he’s done and see if we can reset it or establish what’s wrong

What type of compressor did he fit, amk, or hitachi, Dunlop

Can’t remember if ur panel is the same as mine

Thks

Are u talking about this kind of height between the wheel and arch plse

Also have u got any diagnostics

He said it wasn't jacked up just on the ramp.its sitting up.when you start it up you can here the pump and it says maximum hight resetting then it drops back down and says suspension malfunction the little jeep sign with arrows comes on

Soon as the light comes on it goes straight back up to max hight

It's a amk pump

Shhh.. don't say Jeep....
Good luck

Mack1966 said:

It's a amk pump

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Thks, sorry for so many questions

Did u have an AMK pump before or a different brand plse

First thing I would check is ensure all the height sensors are still connected

Sounds like it going into extended mode

Ref the light does it look like 2 arrows either side of a vehicle roof

I’m also wondering if he touched the reservoir valve or didn’t plug every back in

Will he take it back to look at it or isn’t he sure

Any diagnostics

So

1) check all height sensor arms are still connected , by electric plug and also arm to wishbone
2) was it an AMK compressor before it was changed
3) any diagnostics available and has it been plugged in

Please let us know how u get on

Ps, trouble is when u don’t disable the suspension in can cause all sort of issues , the computer will automatically self level the suspension , but let’s see if we can go through it step by step

Shame ur not closer as I would have helped u

It was a amk.pump before and this it what it says on diagnostic many thanks

Mack1966 said:

It was a amk.pump before and this it what it says on diagnostic many thanks

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Great and many thks

Have u got access to this diagnostic reader plse, will make life easier , assume u didn’t have these faults before hand apart from a knackered compressor

What has the mechanic said plse with regards to this error , just so I know what stage ur at and what’s been tested

Had to virtually rebuild my entire suspension so will help u all I can , alas learnt over time it’s a slow process of ensuring everything is checked step by step and ruling things out one by one

Plus at the end of the day it may just be a faulty new air compressor ????

Not connected correctly , the list goes on and on, lol

Can then at least between us start eliminating things and hopefully start pinning it down , always happy to help mate

Here’s what ur fault code means

C1A13-64 Pressure Does Not Decrease When Venting Gallery - Signal plausibility failure
Signal plausibility failure
Gallery pipe from rear valve block to suspension air supply unit blocked/damaged
Air suspension exhaust silencer or exhaust pipe blocked/restricted
Rear valve block pipes connected incorrectly
Pressure sensor fault
Exhaust valve stuck closed

Visually check the gallery pipes for evidence of melting, crushing, kinking or collapsing. If pipes appear sound, disconnect the pipe at both ends and check for free air flow. Repair/renew pipes as required, clear DTC and retest

Check the air suspension air supply unit exhaust silencer/exhaust pipe for blockages/restrictions. Repair as required, clear DTC and retest

Starting with the vehicle around normal height, using the manufacturer approved diagnostic system, open the exhaust valve. If the rear suspension height lowers quickly as soon as the exhaust valve is opened then a rear air spring pipe and the front gallery pipe are fitted to the rear valve block incorrectly. Rectify as required, clear DTC and retest

To check air pressure sensor, use the manufacturer approved diagnostic tool to vent the common gallery via the exhaust valve. Then disconnect the 8mm delivery pipe from the delivery port on the back of the air dryer and connect a T-piece fitting. Connect one port of the T-piece to the blue delivery port via a short length of 8mm pipe. Connect the other port of the T-piece to a calibrated pressure gauge tool (Note that an 8mm connector will be required).

Using the manufacturer approved diagnostic tool, run the suspension air supply unit until the pressure is in the range 1500 - 1800 Kpa. Read the system pressure using the manufacturer approved diagnostic tool. Divide the measurement in Kpa by 100 then subtract 1 at sea level (0.9 at 900m elevation, 0.8 at 1900m elevation, or 0.7 at 3000m elevation) to convert to bar and compare the result with that displayed by the pressure gauge. If the readings are not within 2.0 bar of each other then the pressure sensor is likely to be faulty. In the case of a faulty pressure sensor, check and install a new valve block as required. Clear DTC and retest

To check for a stuck exhaust valve, use the manufacturer approved diagnostic tool to run the suspension air supply unit until a gallery pressure of at least 500 Kpa is reached, then switch off the suspension air supply unit and ensure all valves are closed before opening the exhaust valve and noting any changes in gallery pressure. If the gallery pressure drops quickly to between 125 Kpa and 250 Kpa at sea level (115 Kpa and 240 Kpa at 900m elevation, 105 Kpa and 230 Kpa at 1900m elevation, or 95 Kpa and 220 Kpa at 3000m elevation) then the exhaust valve is operating correctly.

If the gallery pressure cannot vent quickly below 220 Kpa to 250 Kpa (elevation dependent, see above), then there is a fault with the air suspension system or its exhaust valve. Disconnect the 8mm delivery pipe from the delivery port on the back of the air dryer. Connect a calibrated pressure gauge tool directly into the delivery port. (Note that an 8mm connector will be required).

Run the suspension air supply unit to generate 3 to 4 bar and then actuate the exhaust valve. If the pressure cannot vent quickly to between 0.25 bar and 1.5 bar then the exhaust valve is the likely cause of failure. In this case, check and install a new suspension air supply unit as required.

If the pressure can vent quickly to between 0.25 bar and 1.5 bar then check for a blockage in the pipe between the compressor and the rear valve block, and/or a blockage in the rear valve block, and/or a pressure sensor fault. In the case of a blocked pipe, repair or replace the faulty pipe as required. In the case of a blockage in the rear valve block or a pressure sensor fault, check and install a new rear valve block as required. Clear DTC and retest

Also here’s a drawing I’ve done, sorry it’s so rough , but as a reference for u

Also this is what pressures u should have on ur compressor , I’ve also enclosed a data screen of my suspension when I started to work on it

Check the exhaust valve is plugged in correctly - I had similar when replacing a compressor and it was the exhaust valve connector not pushed fully home - looked alright but wasn’t making the electrical connection

Will do thanks

Thanks everyone turns out it was a blocked hose on the exhaust valve side