2003 l322 td6 AIR SUSPENSION INACTIVE - HDC INACTIVE

Hi all aware that this has probably been discussed many times but here goes

When I start the car the warnings above show on the car but the suspension will operate on all settings
upon moving away and after 10 mph and a 100m or so the faults clear themselves.
Then after a few miles driving on various roads and speeds the faults comes back and lock the suspension out with the same alarms.
Again if the car is then left for a few hours and restarted the faults still show but the suspension works and upon moving off the faults clear themselves.
I have changed the front wheel speed sensors but not the rear however a code reader that was left by the previous owner (I CAR SOFT LRV1.0) reads the following code
PERMANENT BRAKE LIGHT SWITCH
The reader is capable of clearing the fault all lights go out and all suspension then works but again after a few miles or so they come back.
Looking through the history of the car there is mention of a new brake light switch being fitted but I assume this is ok as all brake lights work and they don't stay on.
I have also tried the lock to lock reset but this does nothing.
Battery voltage shows at just under 14v (13.9) when running - battery is less than 6 months old.

Any help advice would be greatly appreciated

Thanks Gordon

Your voltage is down you should be looking at 14.8v at 2000rpm with all things on, lights heater stereo every thing, low voltage will throw up all sorts of faults.

brianp38dse said:

Your voltage is down you should be looking at 14.8v at 2000rpm with all things on, lights heater stereo every thing, low voltage will throw up all sorts of faults.

Click to expand...

To me, 13.9v sounds fine on TD6, mines around the same with 4+ year old Bosch battery and mine doesn't have any faults.
I would sort the ' brake light switch' fault, time for a new one IMO if it is throwing up a fault or try different more LR specific diagnostics? The icarsoft is very very basic for the L322.
Why did you change the front speed sensors?

thanks for the prompt replies

I will put a meter on the battery later to re test when running and put the full load on as you suggest lights / heaters / ac etc

when I had the car the previous owner mentioned that one of the sensors was showing faulty from a service - they had purchased 2 new front sensors so I thought
id might as well change them - did this when I fitted new disks pads etc over a year ago and not had any issue until recently with the air suspension faults etc

not sure when the brake switch was done or the mileage but I would not expect these parts to fail regular ?

I will fit a new switch and see if that cures it

thanks

I cant remember if it was the P38 or the L32w but onone( or both) theswitch needs tobefitted then adjusted correctly.

Hi all just an update
So new brake switch fitted and all sorted but a trip to my local 4x4 garage showed up an injector fault when the diagnostic was done

So my simple brake light replacement cured the AIR SUSPENSION faults but have ended up replacing 2 injectors

But on the positive car now starts much better I bought the 10 second cranking before starting was normal but now she fires instantly