P38A EAS level confusion

kermit_rr · Jan 2, 2020

Hi all
A couple of issues have cropped up, first one I've just ignored, i know that's not the right attitude but didn't seem to be a problem
Wondering if the 2 issues are related
Firstly, the system levels when the doors etc are open. The becm knows there open but the eas doesn't receive the signal
Secondly, the eas intermittently hunts until the pump kicks in and we have a game pump then hunt. This happens at all height options apart from access, click click click, small adjustments.
The fact it happens at all heights, suggests to me it's unlikely to be a dodgy height sensor, more likely a connection into the eas ecu? Is that the first thing to check and do i need to disconnect the battery before unplugging the eas ecu? Or can i just pull the relevant fuses and relays
It's been damp inside so connections could well be a problem, touch wood everything else seems ok
Cheers

marjon · Jan 2, 2020

kermit_rr said:
do i need to disconnect the battery before unplugging

I would always, before doing any electrickery unplugging. Play safe

J

kermit_rr · Jan 2, 2020

I'd just prefer not to if there's a viable alternative

BEEP not set

marjon · Jan 2, 2020

So what’s the problem with Mr beep? Just set it?

J

kermit_rr · Jan 2, 2020

No problem, I've not fixed the window or sunroof yet! That's further down the list

marjon · Jan 2, 2020

Ok.
I am not going to commit a fuse can be pulled until I consult ..........

good luck somebody will be along soon with some useful advise

Apart from fix the window and sunroof

J

Saint.V8 · Jan 2, 2020

I'd be making sure the connections clean and dry, this includes the white connector at the pax (UK) A pillar area too.

kermit_rr · Jan 2, 2020

Saint.V8 said:
I'd be making sure the connections clean and dry, this includes the white connector at the pax (UK) A pillar area too.

What's the pax? I'm guessing somewhere in the floor?

Saint.V8 · Jan 2, 2020

kermit_rr said:
What's the pax? I'm guessing somewhere in the floor?

Sorry....vernacular for Passanger

marjon · Jan 2, 2020

Behind the side kick panel.

But @Saint.V8 would you do this battery still connected?

J

Saint.V8 · Jan 2, 2020

marjon said:
Behind the side kick panel.

But @Saint.V8 would you do this battery still connected?

J

No, there is potential for the EAS to go into fault....you could *maybe* disconnect the EAS delay timer from under the pax seat to disable the EAS from powering up but this *may* not prevent the EAS from detecting errors....it *should*, as the EAS ECU will be in a state as if the battery was disconnected I believe...but without looking at the wiring diagrams at the moment, I don't know is ther eis another power source to the ECU including this one from the delayu timer.

pete12345 · Jan 2, 2020

Mine was playing up along with the pixels on the heating panel but I think it’s damp related I’m waiting for a dehumidifier to arrive and see what that resolves

RangeRoller dt · Jan 2, 2020

It is damp lately.
My hevac is all pixelated until it’s had good run.

Grrrrrr · Jan 3, 2020

kermit_rr said:
Hi all
A couple of issues have cropped up, first one I've just ignored, i know that's not the right attitude but didn't seem to be a problem
Wondering if the 2 issues are related
Firstly, the system levels when the doors etc are open. The becm knows there open but the eas doesn't receive the signal
Secondly, the eas intermittently hunts until the pump kicks in and we have a game pump then hunt. This happens at all height options apart from access, click click click, small adjustments.
The fact it happens at all heights, suggests to me it's unlikely to be a dodgy height sensor, more likely a connection into the eas ecu? Is that the first thing to check and do i need to disconnect the battery before unplugging the eas ecu? Or can i just pull the relevant fuses and relays
It's been damp inside so connections could well be a problem, touch wood everything else seems ok
Cheers

You might be right. It shouldn't level with doors or tailgate open. The only thing I can think of is the EAS computer itself ... Although, if you replace the delay timer relay with a standard automotive relay, does it still do it?

Datatek · Jan 3, 2020

RangeRoller dt said:
It is damp lately.
My hevac is all pixelated until it’s had good run.[/QUOTE

RangeRoller dt said:

It is damp lately.
My hevac is all pixelated until it’s had good run.

Click to expand...

.

The HEVAC display is a segment display, no pixels

Datatek · Jan 3, 2020

marjon said:
Behind the side kick panel.

But @Saint.V8 would you do this battery still connected?

J

Unless you know what you are doing, disconnect the battery if you are going to cut out the white connectors.
You can unplug the EAS ECU without disconnecting the battery.

kermit_rr · Jan 3, 2020

I've not tried that! I'd rather fix though. Doesn't do anything at all if i take the relay out

Datatek · Jan 3, 2020

kermit_rr said:
I've not tried that! I'd rather fix though. Doesn't do anything at all if i take the relay out

Is it the correct relay?

kermit_rr · Jan 3, 2020

Datatek said:
Unless you know what you are doing, disconnect the battery if you are going to cut out the white connectors.
You can unplug the EAS ECU without disconnecting the battery.

I'll start with checking the connections to the ecu, then move to finding the white plug. I'd prefer to fix that rather than cut and splice

kermit_rr · Jan 3, 2020

Datatek said:
Is it the correct relay?

Yes it's a big tall black one

P38A EAS level confusion

Very

Well-Known Member

Very

Well-Known Member

Very

Well-Known Member

Dyed-in-the-wool 100% RR Junkie

Very

Dyed-in-the-wool 100% RR Junkie

Well-Known Member

Dyed-in-the-wool 100% RR Junkie

Well-Known Member

Well-Sprung Member

Technician, Bodgit & Scarper Ltd

Well-Known Member

Well-Known Member

Very

Well-Known Member

Very

Very

Similar threads