Hello All,
I had an Airbag Fault message on the Instrument Cluster Display (can't think of the conventional nomenclature at present) and went about unplugging and cleaning and re-plugging sensors. Turned out it was the crash sensor under the battery tray of my 02 RR P38 4.6 HSE LHD. With a contact cleaning, the message went away.

I don't drive the RR except on Friday-Sunday. I started getting the Airbag Fault message again. I'm thinking that if your battery is low (like from sitting), it will cause a trigger for the last fault you actually had, even though it is not really a current fault. It is just a low battery. Any thoughts?
Thanks,
Vancer

You haven't jumped it lately, have you?

i had similar fault last year and turned out to be battery

When I was having issues on mine cleaning the connectors was not enough. I got some dielectric grease and applied to to all pins. No light since.

That reminds me, I still need to get the plugs off the crash cans and give them a clean to see if it shifts my warning as well.

GeorgeB wrote:

That reminds me, I still need to get the plugs off the crash cans and give them a clean to see if it shifts my warning as well.

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Won't self clear the warning on a '95, even if you rectify the problem. Will need a Nano or similar...

Orangebean wrote:
>

Won't self clear the warning on a '95, even if you rectify the problem. Will need a Nano or similar...

We have the technology! :-)

Thanks for the replies.
No, I've had the rig 2 years and have never jumped it. It sits during the week and I think the battery does not always charge back up all the way (do not suspect any real electrical problems). Was just curious that it would say Airbag Fault when there really is not an Airbag Fault.

It actually did not do that this last week. It's starting to get cooler here in Memphis.
Vancer

Airbag ECU's typically store a fault when it detects that it's supply / the battery voltage goes below a certain threshold, because it relies on a good input voltage to create the High output voltage required to fire an Airbag. Depending on The Airbag ECU model / design / year / complexitity it may still indicate a fault after the Voltage is returned to being above the threshold.

Nanocom or otherwise, keeping up with P38 problems really does require an investment in some form of diagnostic equipment.

ATB

Colin

Thanks for the explanation, Colin. Makes sense. Another week with no error messages. Rig is in really good shape.
Nanocom is financially prohibitive at present.

Hiyas Vancer

No worries, not selling anything, I am just trying to help and enlighten any and all Landy Lovers to understand things related to their problems based on what I believe I know and understand from my diagnostic equipment development perspective and provide honest advice.

Right now I Have a 2012 Evoque that I need to replace at least 3 of the door handles on due to an apparently known water ingression problem and a 2003 L322 with a seemingly snapped bonnet release cable I need to sort, which no amount of diagnostic equipment can help me with.

I am just another Landy loving Owner / victim just like everyone else here.

ATB

Colin