Baffledwarrior
Member
Thanks Gold Rover you have been a lot of help, Cheers
What @Saint.V8 said, and my brain hurts now after looking at that pdf !. Didnt they do away with headlight leveling ecu about that year, no doubt saint will know (in other news I now have biscuit crumbs all over my key board !).
gold rover
Well-Known Member
If you are considering a rebuild kit I got mine from X8R with a nice aluminum cap for the drier, but you will need to check what pump you have first before you order.
Seems strange it’s turning off early on pressure, and giving a reading. Are you sure it’s not temp that’s turning it off?
Good luck with the battery.
But can’t believe nobody has mentioned water ingress in the rear connectors (unless I missed that)
J
Seems strange it’s turning off early on pressure, and giving a reading. Are you sure it’s not temp that’s turning it off?
Good luck with the battery.
But can’t believe nobody has mentioned water ingress in the rear connectors (unless I missed that)
J
holidaychicken
Well-Known Member
Diagnostics is always my first call after good battery that is as GR points out, and downloading rave manual both repair and system description and operation, so that makes diagnostics third then, the diagnostic kit you have is not cheap so i would hope it did a good job although the L322 is a fussy ****.
As saint says i would try and scan for more information as the L322 will divulge a lot generally if you ask in the right way, using the right language, on the right day...
This is the one i used - https://www.bagpipingandy.com/
There are a lot now available including ebay.
if the piston or motor is worn it may not be able to produce the pressure required now matter how long the compressor runs for and could be cutting off if its too hot which again is another fault code.
Solid lights or no lights on the height adjustment knob give an indication to the type of fault, hard or soft - again search saint's posts regarding this but caution is advised when searching and include EAS or suspension in your search terms and exclude knob as if you just search @Saint.V8 hard then soft on the tinternet you could stumble into his other hobby
The fact the compressor is running and cutting off is a good sign, sort of, unless it only starts to run once you clear the faults.
There are many fault codes relating to the entire air suspension, the canbus error is common but doesn't necessarily mean there is a canbus fault as i think it returns that when the eas faults out whatever the cause. i am not certain but there must be a pressure sensor to tell it when to stop running, check rave system description and operation manual.
The 04 should have a wabco compressor.
As above water ingress in nearside rear compartment and collecting under the eas compressor is common, you would know this by the fact that it is wet...
Not done much with the entertainment system, i would try an isolate the fault to see if it is the vehicle or the unit that is the problem or at least test the power supply going to it. There is a rave wiring diagram section as well if you don't have that already which may help. Does the satnav work as mine is a bit gimped having got bored on many occasions and not being arsed to wait the correct amount of time for it to shut down before disconnecting the battery and that freezes my wireless and the funny little gramophone in the glove box until i take the little shiney record thing out of the satnav unit
The early satnav is as much use as, well, just about everything else on the L322.
I think you could sum up everything i have just written as no ****ing help whatsoever but i needed the exercise.
As saint says i would try and scan for more information as the L322 will divulge a lot generally if you ask in the right way, using the right language, on the right day...
This is the one i used - https://www.bagpipingandy.com/
There are a lot now available including ebay.
if the piston or motor is worn it may not be able to produce the pressure required now matter how long the compressor runs for and could be cutting off if its too hot which again is another fault code.
Solid lights or no lights on the height adjustment knob give an indication to the type of fault, hard or soft - again search saint's posts regarding this but caution is advised when searching and include EAS or suspension in your search terms and exclude knob as if you just search @Saint.V8 hard then soft on the tinternet you could stumble into his other hobby
The fact the compressor is running and cutting off is a good sign, sort of, unless it only starts to run once you clear the faults.
There are many fault codes relating to the entire air suspension, the canbus error is common but doesn't necessarily mean there is a canbus fault as i think it returns that when the eas faults out whatever the cause. i am not certain but there must be a pressure sensor to tell it when to stop running, check rave system description and operation manual.
The 04 should have a wabco compressor.
As above water ingress in nearside rear compartment and collecting under the eas compressor is common, you would know this by the fact that it is wet...
Not done much with the entertainment system, i would try an isolate the fault to see if it is the vehicle or the unit that is the problem or at least test the power supply going to it. There is a rave wiring diagram section as well if you don't have that already which may help. Does the satnav work as mine is a bit gimped having got bored on many occasions and not being arsed to wait the correct amount of time for it to shut down before disconnecting the battery and that freezes my wireless and the funny little gramophone in the glove box until i take the little shiney record thing out of the satnav unit
The early satnav is as much use as, well, just about everything else on the L322.
I think you could sum up everything i have just written as no ****ing help whatsoever but i needed the exercise.
Last edited:
Baffledwarrior
Member
Diagnostics is always my first call after good battery that is as GR points out, and downloading rave manual both repair and system description and operation, so that makes diagnostics third then, the diagnostic kit you have is not cheap so i would hope it did a good job although the L322 is a fussy ****.
As saint says i would try and scan for more information as the L322 will divulge a lot generally if you ask in the right way, using the right language, on the right day...
This is the one i used - https://www.bagpipingandy.com/
There are a lot now available including ebay.
if the piston or motor is worn it may not be able to produce the pressure required now matter how long the compressor runs for and could be cutting off if its too hot which again is another fault code.
Solid lights or no lights on the height adjustment knob give an indication to the type of fault, hard or soft - again search saint's posts regarding this but caution is advised when searching and include EAS or suspension in your search terms and exclude knob as if you just search @Saint.V8 hard then soft on the tinternet you could stumble into his other hobby
The fact the compressor is running and cutting off is a good sign, sort of, unless it only starts to run once you clear the faults.
There are many fault codes relating to the entire air suspension, the canbus error is common but doesn't necessarily mean there is a canbus fault as i think it returns that when the eas faults out whatever the cause. i am not certain but there must be a pressure sensor to tell it when to stop running, check rave system description and operation manual.
The 04 should have a wabco compressor.
As above water ingress in nearside rear compartment and collecting under the eas compressor is common, you would know this by the fact that it is wet...
Not done much with the entertainment system, i would try an isolate the fault to see if it is the vehicle or the unit that is the problem or at least test the power supply going to it. There is a rave wiring diagram section as well if you don't have that already which may help. Does the satnav work as mine is a bit gimped having got bored on many occasions and not being arsed to wait the correct amount of time for it to shut down before disconnecting the battery and that freezes my wireless and the funny little gramophone in the glove box until i take the little shiney record thing out of the satnav unit
The early satnav is as much use as, well, just about everything else on the L322.
I think you could sum up everything i have just written as no ****ing help whatsoever but i needed the exercise.
WOW that was an amazing read and quite informative, I have just replaced the battery with a 110ah 920cca one and the infotainment is now back on and seems to be behaving itself, the radio and the satnav are working which they weren't before the battery was replaced so fingers crossed that problem is sorted, thanks to Gold Rover for pointing me in that direction.
The air suspension is still a mystery though and its behaving really strangely, it held its pressure for a week whilst not being used so i think I can rule out anything passed the valve block and the reservoir stayed at 5.3 bar all week as according to my Launch x431 scanner. When I operate the rotary switch to tell it to raise the compressor doesn't kick in which i would expect it to and the raise light comes on and flashes but nothing else happens, if I switch it back to the normal setting I hear the compressor kick in for a couple of seconds and then the standard height setting light stays lit, if i put it to lower to access position the compressor kicks in for a couple of seconds and the light flashes but the suspension stays at the standard height. i have checked the compressor temperature during all these instructions and it never gets hot as it never runs longer than a couple of seconds as if its happy with the 5.3 bar of pressure in the reservoir, I have removed the relay for the compressor and bridged the supply contacts to the compresor and run it that way and still the pressure doesn't raise but the compresor temperature does go up, going by that I would either think the compressor isn't kicking out enough pressure or there is a leak from the compressor to the reservoir but I can't find a leak so I'm thinking its the compressor. if anyone can see a problem with my thinking please please please speak now or for ever hold your peace. Once again Thanks to Goldrover for the battery suggestion.
Baffledwarrior
Member
Don't thank me too soon. Might help, but might not be only issue
Battery replaced with a 110ah 920 cca one and the infotainment system is back working again, you were spot on with your suggestion Thank You
Wazzajnr
Well-Known Member
Without checking, I may be barking up the wrong tree, but here goes.
If the pressure switch is between pump and tank, maybe the supply line to tank is somehow blocked so the compressor fills the pipe and pressure switch with air and switches off but no air actually gets to the tank.
Think you need to check pressure actually at the tank before anything else.
If the pressure switch is between pump and tank, maybe the supply line to tank is somehow blocked so the compressor fills the pipe and pressure switch with air and switches off but no air actually gets to the tank.
Think you need to check pressure actually at the tank before anything else.
Baffledwarrior
Member
The reservoir pressure sender is fitted to the rear end of the tank from what i can see on the pictures of tanks on ebay for sale but I like the thinking behind your possible solution. As for checking the pressure at the tank I am struggling to think of a way to check it, I can't find a gauge that would be able to plug onto it, its a shame they don't fit some kind of test point to it for situations like these.
Wazzajnr
Well-Known Member
Is it push fit nylon pipe into the tank? If so, a short length of pipe, a push fit tee and a gauge will do it.
When I had issues on my p38 I bought 3 gauges and a handful of fittings and had the gauges in the cab so I could see what was going on easily
Gauges are about a fiver from machine mart and/or find your nearest pneumatics stockist on Google and they will be able to help.
You need to work out
A. Do you actually have air
B. Is it enough air
C. Is it getting to the right place
I seem to recall that the same gallery on the valve block is used to both fill the tank and exhaust the pump and bags so one solenoid not working as it should could easily cause issues.
My guess is that the sensor on the tank is an analogue sensor measuring pressure but the compressor may well have an "overpressure" switch on it too.
When I had issues on my p38 I bought 3 gauges and a handful of fittings and had the gauges in the cab so I could see what was going on easily
Gauges are about a fiver from machine mart and/or find your nearest pneumatics stockist on Google and they will be able to help.
You need to work out
A. Do you actually have air
B. Is it enough air
C. Is it getting to the right place
I seem to recall that the same gallery on the valve block is used to both fill the tank and exhaust the pump and bags so one solenoid not working as it should could easily cause issues.
My guess is that the sensor on the tank is an analogue sensor measuring pressure but the compressor may well have an "overpressure" switch on it too.
Taken from a manual I have.
Fault Detection
The air suspension ECU performs fault detection and plausibility checks. Fault detection is limited to faults that the ECU can directly measure, as follows:
l Sensor hardware faults
l Valve hardware faults
l Sensor and actuator supply faults l Bus failures
l ECU hardware errors.
Plausibility checks are checks on signal behaviour, as follows:
l l
l
l l
Average height does not change correctly
l Height changes too slowly
l Suspension moves in the wrong direction.
Reservoir pressure
l Does not increase when reservoir filling requested
l Does not decrease when reservoir used to lift vehicle l Does not decrease when reservoir is vented
l Pressure varies too much when inactive.
Compressor temperature
l Increases when compressor inactive
l Does not increase when compressor active.
'Energy' used to change height of corner
l Too much 'energy' used – height change takes too long or long term filtered height does not reach target.
Sensor activity
l Signal floating
l Inconsistent signal characteristics – signal on one side of axle is varying but other side remains static l Constant articulation when moving.
When a fault is detected, the ECU will attempt to maintain a comfortable ride quality with restricted functionality of the air suspension system.
The system functionality depends on the severity of the fault. The faults are defined as minor or major faults.
Minor faults are:
l Most sensor faults (hardware faults and plausibility faults) l Cross link valve failure
l Reservoir valve failure.
For most minor faults, height changes are inhibited except for a return to standard height. If the suspension is not in standard height, the ECU will respond to a request for manual or automatic height change to return the vehicle to standard height. The ECU will continue to level the vehicle at the 'current' ride height.
Major faults are:
l l
Compressor faults
Plausibility errors – for example:
l Average height does not increase when lifting and the vehicle is moving. This could be caused by a
compressor fault or a fault in the reservoir valve.
l Reservoir pressure decreases when filling requested. This could be caused by a leak in the common gallery
in the valve block or connecting pipe.
For major faults the ECU will not level the vehicle at the 'current' ride height. The ECU freezes height changes until it receives a manual or automatic request for height change. The ECU will return to standard height and freezes once standard height is achieved.
If the air suspension ECU loses information regarding vehicle speed, the ECU cannot determine if the current ride height is suitable for the vehicle speed. The ECU immediately returns to the 'default' height, which is 20 mm below the standard height. Once at the default height, the ECU will continue to level the vehicle at this height. A loss of the speed signal could be due to a fault in the CAN Bus or a fault in the ABS ECU. It is unlikely to be a fault in the air suspension ECU. It may, for example, be caused if the battery is disconnected and the steering sensor is not recalibrated immediately after reconnection. In this case a CAN Bus fault is recorded in the error memory. If this fault is seen, other ECU's using the CAN Bus should be also be checked for faults. When the fault is repaired, the air suspension ECU will resume full functionality but the CAN error remains in the memory
I would say you need to check again for fault codes.Manual is here if you want some bedtime reading might help.
https://www.landroverweb.com/Pdf-files/Manuals/Workshop Manual L322 Range Rover.pdf
The suspension will just sit-in normal height if it sees a fault to conserve air. Reliable diagnostics is the first place to go, from here me thinks.
J
Edit sorry the sloppy paste format is not quite right
Fault Detection
The air suspension ECU performs fault detection and plausibility checks. Fault detection is limited to faults that the ECU can directly measure, as follows:
l Sensor hardware faults
l Valve hardware faults
l Sensor and actuator supply faults l Bus failures
l ECU hardware errors.
Plausibility checks are checks on signal behaviour, as follows:
l l
l
l l
Average height does not change correctly
l Height changes too slowly
l Suspension moves in the wrong direction.
Reservoir pressure
l Does not increase when reservoir filling requested
l Does not decrease when reservoir used to lift vehicle l Does not decrease when reservoir is vented
l Pressure varies too much when inactive.
Compressor temperature
l Increases when compressor inactive
l Does not increase when compressor active.
'Energy' used to change height of corner
l Too much 'energy' used – height change takes too long or long term filtered height does not reach target.
Sensor activity
l Signal floating
l Inconsistent signal characteristics – signal on one side of axle is varying but other side remains static l Constant articulation when moving.
When a fault is detected, the ECU will attempt to maintain a comfortable ride quality with restricted functionality of the air suspension system.
The system functionality depends on the severity of the fault. The faults are defined as minor or major faults.
Minor faults are:
l Most sensor faults (hardware faults and plausibility faults) l Cross link valve failure
l Reservoir valve failure.
For most minor faults, height changes are inhibited except for a return to standard height. If the suspension is not in standard height, the ECU will respond to a request for manual or automatic height change to return the vehicle to standard height. The ECU will continue to level the vehicle at the 'current' ride height.
Major faults are:
l l
Compressor faults
Plausibility errors – for example:
l Average height does not increase when lifting and the vehicle is moving. This could be caused by a
compressor fault or a fault in the reservoir valve.
l Reservoir pressure decreases when filling requested. This could be caused by a leak in the common gallery
in the valve block or connecting pipe.
For major faults the ECU will not level the vehicle at the 'current' ride height. The ECU freezes height changes until it receives a manual or automatic request for height change. The ECU will return to standard height and freezes once standard height is achieved.
If the air suspension ECU loses information regarding vehicle speed, the ECU cannot determine if the current ride height is suitable for the vehicle speed. The ECU immediately returns to the 'default' height, which is 20 mm below the standard height. Once at the default height, the ECU will continue to level the vehicle at this height. A loss of the speed signal could be due to a fault in the CAN Bus or a fault in the ABS ECU. It is unlikely to be a fault in the air suspension ECU. It may, for example, be caused if the battery is disconnected and the steering sensor is not recalibrated immediately after reconnection. In this case a CAN Bus fault is recorded in the error memory. If this fault is seen, other ECU's using the CAN Bus should be also be checked for faults. When the fault is repaired, the air suspension ECU will resume full functionality but the CAN error remains in the memory
I would say you need to check again for fault codes.Manual is here if you want some bedtime reading might help.
https://www.landroverweb.com/Pdf-files/Manuals/Workshop Manual L322 Range Rover.pdf
The suspension will just sit-in normal height if it sees a fault to conserve air. Reliable diagnostics is the first place to go, from here me thinks.
J
Edit sorry the sloppy paste format is not quite right
gold rover
Well-Known Member
Glad I could help.
Baffledwarrior
Member
Right just a quick update to the suspension problem, I repaired the wabco compressor with a BagpipeAndies repair kit and now the reservoir builds up to 9.8 bar which seems enough to get the suspension working as it should do all be it a bit slower than it used to raise, it sits at the correct height now so my friend is happy with that for now. The infotainment system has a mind of its own, it works when it feels like it, it can work for days on end and others not at all, I have wriggled every wire I can find associated with the system but it doesn't cause the screen to go off when its working, unplugging the fibre optic cables just stops the radio working and replugging them back in restores the sound so I'm pretty sure that isn't the problem. The nearside rear compartment is totally dry so I can rule out water ingress. I think my friend is thinking of cutting the car loose as she needs a reliable motor and this one certainly isn't in that bracket oh and the EGR is playing up as well GRRRRRR
