P38 Rave EAS Pneumatic Diagram Errors

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Derek Ward

Derek Ward

Active Member
Posts
798
Location
Happily Ex Blackburn, Now Blairmore, Argyll & Bute
Has anyone else noticed that the pneumatic diagram for the air suspension in Rave has drawing errors?
1. The solenoid for the right hand air spring (outlet 4) shows the line going straight through where it should be the same as the other three solenoids.
2. The solenoid diaphragm valve nr 12 cannot work as drawn – the passages should be reversed when the solenoid is operated (left hand section of the solenoid).
3. Air operated diaphragm valve nr 13 upper and lower sections are reversed – it’s shown as being operated by the pump air pressure in which case the air will just go straight through to the exhaust.
4. If anyone was wondering what item 11 is, it’s a pressure relief valve
I know I’m being pedantic but if you’re new to it and trying to work out how it works, it doesn’t make sense when read in conjunction with the description. It should also be noted that the air operated diaphragm valve is not spring loaded so will stay in the last position it was operated. All the other valves are spring loaded.

I’ll go and change me anorak now and look for a life……..:)
 
Leave your coat on then check out the list below then tell me which wire goes where

FL Signal Incorrect
FR Signal Incorrect
RL Signal Incorrect
RR Signal Incorrect
Pressure Signal Constantly high
Target Heights Incorrect
Cannot Lower RL
FA 16 Hidden
FA 64 Hidden
RL Valve Stuck Open
Inlet Valve Stuck Open
FB 64 Hidden
RL Valve Stuck Closed
Inlet Valve Stuck Closed
FC 64 Hidden

But do not worry, I have my own tutor who is lending support whilst I cry in my beer, however finding fault with RAVE is the least of my worries but just to let you know that replacing a Selanoid in the wrong location causes the above list. Trust me I did it
 
Derek Ward said:
Has anyone else noticed that the pneumatic diagram for the air suspension in Rave has drawing errors?
1. The solenoid for the right hand air spring (outlet 4) shows the line going straight through where it should be the same as the other three solenoids.
2. The solenoid diaphragm valve nr 12 cannot work as drawn – the passages should be reversed when the solenoid is operated (left hand section of the solenoid).
3. Air operated diaphragm valve nr 13 upper and lower sections are reversed – it’s shown as being operated by the pump air pressure in which case the air will just go straight through to the exhaust.
4. If anyone was wondering what item 11 is, it’s a pressure relief valve
I know I’m being pedantic but if you’re new to it and trying to work out how it works, it doesn’t make sense when read in conjunction with the description. It should also be noted that the air operated diaphragm valve is not spring loaded so will stay in the last position it was operated. All the other valves are spring loaded.

I’ll go and change me anorak now and look for a life……..:)
Click to expand...

It is a scematic not an engineering drawing it describes the air flow and inter-relationship of components. The Air operated diaphragm valve is spring loaded if yours is missing you have a problem.
 
Last edited:
valve%20block%20006%20diaphram%20block%20off.jpg



Spring that loads air operated diaphragm valve. Just to add, if this spring is missing you will have air constantly coming from exhaust port whilst compressor is running.
 
Last edited:
It is a scematic not an engineering drawing it describes the air flow and inter-relationship of components. The Air operated diaphragm valve is spring loaded if yours is missing you have a problem.

--------------------------------------------------------------------------------
Last edited by wammers; Today at 14:47.
Click to expand...

Aye, I know it's a schematic but if you're trying to figure out how it works, it'd be helpful if it was drawn correctly, especially when you're getting faults like Stevo88 over in Portugal. I stand corrected re the air operated diaphragm valve not having a spring. It's missing off the drawing - sorry - schematic.......:rolleyes::):)
 
Derek Ward said:
Aye, I know it's a schematic but if you're trying to figure out how it works, it'd be helpful if it was drawn correctly, especially when you're getting faults like Stevo88 over in Portugal. I stand corrected re the air operated diaphragm valve not having a spring. It's missing off the drawing - sorry - schematic.......:rolleyes::):)
Click to expand...

aye, and if it wasn't fer this site i'd of bin up the swanny with no paddle!!!! as that rave schematic is pants IMO, speshully if yer a newbie needing an answer
 
Yup, that diagram in RAVE is just broken. Everything is OK if you just ignore the top-leftmost part :D

This document is what I consider the Bible of the EAS. I would love to get my hands on more of these, if they're available: http://www.rangerover.tvn.hu/P38_EAS_Service_bulletins.pdf



David.Wade, with all those errors it's likely that you have a problem comunicating with the EAS. Did you check if you had a green light in EAS_Unlock, stating "Good idle" ?
 
stevo88 said:
aye, and if it wasn't fer this site i'd of bin up the swanny with no paddle!!!! as that rave schematic is pants IMO, speshully if yer a newbie needing an answer
Click to expand...

To be honest i find it quite easy to understand, it would be more helpful to the novice mechanic if it had flow arrows on it no doubt. But if you blow it up and read the text it is fairly easy to put your own in. That helps in the understanding of the way each valve and item react with each other. By tracing the available air flow paths it should be possible to determine what could be causing a particular problem and correct it by process of elimination. The inlet valve opens with any of the bag valves the bag inflates. The exhaust valve opens with any of the bag valves they deflate. If the compressor is working properly it can be seen that there are only two possible air paths, into the tank, or past the diaphragm valve. The very first thing you need is a full air tank. If you can't get one find out why and fix it. That is the starting point.
 
mcapinha said:
Yup, that diagram in RAVE is just broken. Everything is OK if you just ignore the top-leftmost part :D

This document is what I consider the Bible of the EAS. I would love to get my hands on more of these, if they're available: http://www.rangerover.tvn.hu/P38_EAS_Service_bulletins.pdf



David.Wade, with all those errors it's likely that you have a problem comunicating with the EAS. Did you check if you had a green light in EAS_Unlock, stating "Good idle" ?
Click to expand...

Now you have me thinking..... I borrowed my mates Laptop that has a serial port loaded with Windows Vista. I thought that because it has the serial port there was no need to load the Vista Driver and just plug in directly without the USB. Hmmm....wonder if this is incorrect and that I should plug in using the USB instead of direct access through the serial port. I will try it tomorrow via USB even though I swore I would ignore Little Miss Rangie for a weekend for being such a cow!!! (I love her really but perhaps a new engine was not good enough for her and now she yearns for something else that is new)
 
mcapinha said:
Yup, that diagram in RAVE is just broken. Everything is OK if you just ignore the top-leftmost part :D

This document is what I consider the Bible of the EAS. I would love to get my hands on more of these, if they're available: http://www.rangerover.tvn.hu/P38_EAS_Service_bulletins.pdf



David.Wade, with all those errors it's likely that you have a problem comunicating with the EAS. Did you check if you had a green light in EAS_Unlock, stating "Good idle" ?
Click to expand...

Handy document - thanks for the link. How the hell did you find that?
 
mcapinha said:
Yup, that diagram in RAVE is just broken. Everything is OK if you just ignore the top-leftmost part :D

This document is what I consider the Bible of the EAS. I would love to get my hands on more of these, if they're available: http://www.rangerover.tvn.hu/P38_EAS_Service_bulletins.pdf



The above bulletin is certainly useful.I see when I download it the diagrams on page 30 and 31 do not print.I get an error saying" insufficient data to complete diagram" or such like.Anybody have the same error or have downloaded the diagram successfully?:confused:
Click to expand...
 
It was brought to my attention by a user of a Portuguese LR forum, don't know how he found it though.
I can also confirm that I too cannot read the 2 diagrams at the end. From the text I think that it only shows variations of the system in different actions, so there's not any real loss by not reading them.

Not to hijack the thread, but does anyone know what the CD/RAVE/whatever where these might have come bundled? Would love to get more of this material.
 
mcapinha said:
It was brought to my attention by a user of a Portuguese LR forum, don't know how he found it though.
I can also confirm that I too cannot read the 2 diagrams at the end. From the text I think that it only shows variations of the system in different actions, so there's not any real loss by not reading them.

Not to hijack the thread, but does anyone know what the CD/RAVE/whatever where these might have come bundled? Would love to get more of this material.
Click to expand...

your not the only 1!! even this one on its own will come in very handy for me!! thanks for sharing the link with us :D
 
Be aware that the pressure error for the switch is 0.4 bar 5.6 psi and not 0.4 bar 56psi. As quoted in the text. Also if you drop the EAS bit from the address and just type the first section in there are some good photos of the modulator valve that breaks.
 
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