Advice/Help required

[Blade74]

Hello All,
I have a 2010 RRV with 80000kms on it.
Battery replaced about 2 months ago by Graeme Cooper.
I'm currently away in the Grampians Victoria near Horsham.
The suspension has been randomly coming up with "suspension fault" in orange. Then telling me there is a maximum speed of 50kms.
It's been very sporadic in the last week but has now become constant. It drops the car into its bump stops.
I do have a GAP tool and can read the errors.
This is what's showing up.


100300

[Blade74]

100301

[Graeme]

To overcome the suspension lowering the 20A suspension fuse should be removed and to overcome the regular 50 kph messages the 5A suspension ignition feed fuse should be removed. There is another 5A fuse that can also be removed but removing it wont achieve anything whilst the 20A fuse is removed.

The suspension is the first system to be shut down as battery voltage drops and when it does it lowers to the bump-stops as the last action. Stopping the lowering is easy but fixing the low voltage might not be so easy.

[Blade74]

Thanks for the speedy response Graeme.

[Blade74]

I may have found the issue.
I didn't mention it earlier but I got thinking about when the error would show up and it seemed to be when people travelled in the back seats.
So I pulled of the side trim near the rear right seat and this is what I found


100307

[Blade74]

100310

[Blade74]

100312

[Blade74]

So it appears the leather trim piece near the rear seat which has a plastic trim locater that drops down into a hole was pushed through the centre of the loom and had crushed/exposed some cables.

[Graeme]

Fuse 5 in rear compartment is the 20A and fuse 10 in the passenger compartment is the 5A ignition feed. Rear compartment fuse 13 is the 5A compressor relay sense fuse which does not need to be removed.

[Graeme]

As all sensor 5V supplies are from the same 5V supply in the suspension ecu, a short circuit on a front sensor 5V supply would cut voltage for all sensors, hence the message for them all. The 5V regulator in the ecu would have overload protection so should still be OK.

Edit: You've done well to find the pinched wires!

[Blade74]

Thanks for all the info.
It appears to be ok for now.
I'll let you know how it goes in the next week
But yes I was trying hard to put a common factor on it and it seemed like only when I had rear passengers.

[rar110]

I got a suspension fault when my alternator failed last week.

[GregMilner]

Bloody hell Graeme, is there ANYTHING you don't know/can't figure out about these cars?
You should set up a consultancy and charge for this stuff. "Graeme's Everything You Ever Need to Know About Range Rovers and a Lot of Stuff You Never Knew Existed Knowledge Bank - You Deposit, I Deliver the Answer!"

[Piddler]

This is nit the first time we have seen this. All should check.

Cheers

[Blade74]

My gap tool reads around 13.5-13.7 volts. I think the alternator is ok??
I do think it was the crushed exposed wires in the harness.
I may have to solder new pieces in when I get home.

[Blade74]

And yes Graeme is a wealth of knowledge that seems to always be on the forum when you need him and with great info.
Thanks mate

[Graeme]

Linking the fault instances with the back seat being occupied then looking under the nearby trim was the real clincher. I'll certainly check mine.

The air suspension electronics is the same as the D3/D4 and L320 RRS to which I've had quite a lot of exposure during the development of Llams, but with no other knowledge of the L322 such as the fuses which I had to look-up.

[Blade74]

Is there any wiring diagram with actual wire Colours on them?
I want to look up which ones are now exposed. And also make sure there are none that are internally damaged.
I might try and find the Colours back at the fuse box to see which one is the 5 v feed for the suspensions sensors and compressor

[Graeme]

Here's the air suspension and CVD wiring diagram for L322 MY10. Sorry, I've only just spotted your request.
100472

Edit: Note that this is for MY10-MY12 with their air suspension ecu in the right rear compared with MY07-MY09 where the suspension ecu is under the left end of the facia.