Member Since: 24 Feb 2013
Location: Hexham Northumberland
Posts: 40
Red Triangle and low oil indicator lights
Hi all have just noticed my red triangle and low oil light on the dash does not light up
on the instrument panel when the ignition is turned on
is this just a fuse or is it some more worrying
Disco 4 2010 2.7lt
12th Sep 2016 7:52 am
HughMartin
Member Since: 30 Mar 2008
Location: Aberdeenshire
Posts: 751
Assuming all doors are closed, once the self test of all the lights is over (about one second) I am left with the battery symbol, the parking brake symbol (assuming it is applied) and the amber triangle which is the attention getter for the "Press brake when starting" message. There will be no oil pressure warning when the engine is not running. It's not like the old fashioned simple system of a pressure switch wired directly to a warning light. The Discovery is far too clever for that.
One could argue that it might be nice to see the low oil pressure light on when the engine is off as a check that the sensing system is working.
12th Sep 2016 9:08 am
CRV Man
Member Since: 24 Feb 2013
Location: Hexham Northumberland
Posts: 40
side question: is there any way to get the oil pressure from the engine via the IID tool?--
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged
Member Since: 03 Nov 2009
Location: Greater Venice
Posts: 2025
nope!!!
only minimum pressure switch, also confirmed by Patrick (GAP)Discovery 5 tdv6 HSE Corris Gray Outback Engineering Limited Edition IID Pro MV License
1st Nov 2016 7:16 pm
mosuser
Member Since: 27 Sep 2016
Location: Moscow
Posts: 7
Re: Red Triangle and low oil indicator lights
CRV Man wrote:
Hi all have just noticed my red triangle and low oil light on the dash does not light up
on the instrument panel when the ignition is turned on
is this just a fuse or is it some more worrying
Disco 4 2010 2.7lt
The oil pressure switch, located in the 'vee' at the front of the LH cylinder head, connects a ground input to the instrument cluster when oil pressure is present. The switch operates at a pressure of 0.15 to 0.41 Bar (2.2 to 5.9 Psi).
6th Nov 2016 10:27 am
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Not really. It does work that way in the D3 but for the D4 the signal is only treated as an input for the fault mask in the IPC.
The upshot is that on the D3 the signal is live, so can flicker when the oil pressure is erratic, whilst on the D4 the computer can decide if and when the warning is displayed. As there is a time criteria to be satisfied before display a D4 warning it can never flicker and it is possible to have a damaging reduction in oil pressure with zero warning to the driver due to the set value of the pressure switch combined with the latching rate.
Madness I know, but that is way it is set to work on the D4 - it can lunch its engine due to low pressure with the driver blissfully unaware. Despite the intervention on LRCS when I raised this design flaw a few years ago they could not persuade any comment from the technical department. The flaw is easily fixed but has remained across the models and years affected.Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 27 Sep 2016
Location: Moscow
Posts: 7
more correct description for D4 2013 MY and later
The sensor is connected directly to the instrument cluster, not connected to the ECM but is supplied with a reference voltage from the instrument cluster. The Item sensor ground is through the sensor body and the engine. When the oil pressure are in the range of 0.15 to 0.41 Bar, the sensor internal switch contacts close, completing a circuit from the instrument cluster. This circuit is sensed by the instrument cluster which displays and appropriate warning message and warning lamp to alert the driver.
OK?
6th Nov 2016 11:02 am
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Sounds great but no, it does not work that way - we wish it did.
Member Since: 27 Sep 2016
Location: Moscow
Posts: 7
The test confirms that the signal from the oil sensor processed by the instrument cluster, before the alarm lamp turns on. It’s very important not disturb the driver before the engine failure, and then all the lights at once like a Christmas tree. Surprise
I run the test on my MY16
7th Nov 2016 7:54 am
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Yep, I agree.
It would be good to know if the MY16 is different as I have not checked that model year.
Land Rover - Turning Drivers into Mechanics Since 1948
Is there any way to fit an oil pressure sensor to the engine to display in the car, similar to the Madman?--
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged
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