Home > Technical (L322) > height sensor high volts |
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stan Site Moderator Member Since: 13 Jul 2010 Location: a moderate moderated moderator moderating moderately in moderation Posts: 35217 |
this is from the WM, dont mean much to me but it might help you,
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2nd Nov 2014 5:04pm |
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normalrangerover Member Since: 23 Mar 2014 Location: Sligo Posts: 21 |
Thanks, So if the front left has very high voltages does that mean the rear right has to much compression which is causing the hole system to crash, Because the rear right is sitting very high, And its height sensor was changed only the other day after it broke and bracket which it is placed onto might be in a slightly different place than what it should cause the old one was extremely hard to get off. Would it need calibrated do you think? |
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2nd Nov 2014 5:19pm |
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Matt Pearce Member Since: 10 Jan 2018 Location: Bedfordshire Posts: 25 |
Hey Ive got exactly the same issue on my RR2003 except all the wheel heights are ok..
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11th Jan 2018 12:35pm |
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Pawl Member Since: 07 Nov 2017 Location: West Midlands Posts: 682 |
I would think you have a faulty reading as the battery is only 13V & there's not likely to be any transformers in the circuit to raise the voltage.
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11th Jan 2018 1:28pm |
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GraemeS Member Since: 06 Mar 2015 Location: Wagga area Posts: 2453 |
If there is more than 5V between the supply and earth wires at the sensor plug then either the suspension ecu is faulty or another source of power is getting into the wiring from damaged wiring.
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11th Jan 2018 7:43pm |
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Matt Pearce Member Since: 10 Jan 2018 Location: Bedfordshire Posts: 25 |
Hey guys thanks for taking the time to reason this out for me..
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11th Jan 2018 9:30pm |
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GraemeS Member Since: 06 Mar 2015 Location: Wagga area Posts: 2453 |
The 5V and sense wires could be removed from the plug at the ecu to allow testing of the voltage on the 5V and sense pins from the ecu and on the 2 wires going to the sensor. The wires are quite easily removed from the plug once the main centre section is removed from the outer housing. The main centre section can be temporarily refitted to the ecu without the outer housing to allow access to the ecu pins with a meter lead attached to a pin or a small, thin screw-driver. |
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12th Jan 2018 1:04am |
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Matt Pearce Member Since: 10 Jan 2018 Location: Bedfordshire Posts: 25 |
Thanks for this Greame, ill try this today..
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12th Jan 2018 9:28am |
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GraemeS Member Since: 06 Mar 2015 Location: Wagga area Posts: 2453 |
Try just unplugging the main ecu plug then check the voltage on the 5V supply and sense wires at the loom connector at the height sensor. |
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12th Jan 2018 9:36am |
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Matt Pearce Member Since: 10 Jan 2018 Location: Bedfordshire Posts: 25 |
Thats a good idea Greame, Thanks,
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12th Jan 2018 9:45am |
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Matt Pearce Member Since: 10 Jan 2018 Location: Bedfordshire Posts: 25 |
Just to report back, .. ( sorry for my gap in commenting, i have had no internet for the past week or so)
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27th Jan 2018 11:07pm |
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GraemeS Member Since: 06 Mar 2015 Location: Wagga area Posts: 2453 |
What happens if you leave the left front sensor unplugged. The system works in a basic mode with only 3 sensors which is probably what its doing now but leaving the sensor unplugged will show if the articulation errors still occur or not. |
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28th Jan 2018 12:24am |
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Matt Pearce Member Since: 10 Jan 2018 Location: Bedfordshire Posts: 25 |
Thanks Greame, i have tried this..
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28th Jan 2018 12:45am |
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GraemeS Member Since: 06 Mar 2015 Location: Wagga area Posts: 2453 |
I'm suspecting that the LF abs signal might be getting into the height sensor signal circuit due to a wiring fault. Can you unplug the LF abs sensor and go for the short drive that would normally cause the suspension fault to see if it still occurs, possibly monitoring live values for the height sensor at the same time to see if it still gets corrupted? |
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28th Jan 2018 3:47am |
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