Member Since: 15 Jan 2015
Location: Leicestershire
Posts: 57
Disconnecting wires to suspension sensor?
Hi. Having searched through old posts I am non the wiser. Have a rear fault on suspension sensor so nanocom tells me on my 2007 D3. Not sure if it could be the 5v feed to the sensor. If I remove the lead from the sensor to use a multimeter on it will I upset any of the settings? Anyone know which sensor lead should carry the 5v? is there a procedure before disconnecting. ie battery disconnect, remove lead, connect battery? From reading posts seems if change a sensor needs doing in pairs and would need suspension recalibrating?? Appologies if daft question but prefer to be vocal and daft and get right than dumb and daft
Thanks for any replies........
3rd Mar 2015 9:39 am
crwoody
Member Since: 09 Mar 2009
Location: Littleborough
Posts: 2109
There's no problem with unplugging a height sensor, if the ride height ECU detects a sensor value way out of range it should stop any height adjustment since it won't know what to adjust to. once it's back to normal values it should carry on as before, just with a logged fault.
It goes without saying that if you're going to take a wheel off to gain access then you should use an axle stand to support the car and not simply rely on the jack.
I would suspect that the fault has more to do with faulty wiring than a defective sensor, there are a few places where the loom is exposed and can chafe on various bits of the chassis, when I had that problem I found it had worn through the insulation on two wires where the loom passes over a chassis outrigger behind the front N/S wheel-arch liner.Clive
3rd Mar 2015 10:40 am
Rog535
Member Since: 15 Jan 2015
Location: Leicestershire
Posts: 57
Thanks for the reply Clive. Hopefully should easily be able to check the 5v feed and if that's not there begin the tracing back. Will have a search for a wiring diagram but if anyone does know which wire is the 5v feed appreciate it if could let me know. Presume it would be a constant 5v feed with ignition on?
Thanks
Roger
3rd Mar 2015 10:50 am
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
It's best to backprobe connectors than to disconnect them.
Click image to enlarge
Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 15 Jan 2015
Location: Leicestershire
Posts: 57
Ok thanks for the heads up Robbie. Assume they are some super thin probes to get inside to the plug. Is there a "technical" name for them to search on good old Ebay?
Roger
3rd Mar 2015 11:04 am
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
You can spend daft money on them, but I like these:
Member Since: 10 Sep 2012
Location: Northampton
Posts: 1034
Rog535 wrote:
Thanks for the reply Clive. Hopefully should easily be able to check the 5v feed and if that's not there begin the tracing back. Will have a search for a wiring diagram but if anyone does know which wire is the 5v feed appreciate it if could let me know. Presume it would be a constant 5v feed with ignition on?
Thanks
Roger
There should be a constant 5V reference with the key on, NSR Orange Yellow wire, OSR Grey Yellow.
GAP IID Pro Multi Vehicle Defender L316 2007-2015 - Discovery 3 - Discovery 4 - Discovery Sport L550 - Freelander 2 - Range Rover Evoque L538 - Range Rover L322 - Range Rover L405 - Range Rover Sport L320 - Range Rover Sport L494 Electrical Fault Diagnostics
3rd Mar 2015 11:09 am
Rog535
Member Since: 15 Jan 2015
Location: Leicestershire
Posts: 57
That's brilliant, thanks Allan and Robbie. Will get some probes sorted and have a look. Hopign its the sensor as bought some of the cheap LR ones of ebay couple of weeks back. Guess that means it will 100% NOT be the sensor then........
3rd Mar 2015 11:40 am
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
Robbie wrote:
You can spend daft money on them, but I like these:
Robbie
Thanks for the link Ive ordered some, was using clothes pin the other week very fiddly!
3rd Mar 2015 4:36 pm
tayaste
Member Since: 15 May 2013
Location: Chester
Posts: 7633
Ordered as well, looks useful
3rd Mar 2015 5:59 pm
MarkOne
Member Since: 23 Jul 2011
Location: County Antrim
Posts: 3345
They do look handy for that money cheers Robbie
3rd Mar 2015 6:19 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
lynalldiscovery wrote:
Robbie
Thanks for the link Ive ordered some, was using clothes pin the other week very fiddly!
I still use the odd clothes pin and T-pins nicked from my daughter's art box. In fact my in-car toolkit has a few T-pins stuck in a cork together with a couple of wires with alligator clips. Old-school still works as electickery has not changed!
Click image to enlarge
Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 10 Sep 2012
Location: Northampton
Posts: 1034
For those contemplating the use of T-pins it's recommended not to use more than one T-pin per connector, as there's a high risk of the circuit releasing all of its magic smoke if the pins touch. Insulated pins are the safe option
GAP IID Pro Multi Vehicle Defender L316 2007-2015 - Discovery 3 - Discovery 4 - Discovery Sport L550 - Freelander 2 - Range Rover Evoque L538 - Range Rover L322 - Range Rover L405 - Range Rover Sport L320 - Range Rover Sport L494 Electrical Fault Diagnostics
3rd Mar 2015 9:07 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
We like magic smoke.
Land Rover - Turning Drivers into Mechanics Since 1948
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