Land Rover Discovery 2 TD5 Black XYZ Inhibitor Switch Cleaning, Restoration and Refurb How To

If you have an automatic gearbox on your TD5 and you go to start with the key (gear lever in the P/Park position) and nothing happens then chances are it's a XYZ Inhibitor switch problem (common fault) and needs cleaning or replacing, interestingly it would start in N/Neutral position though. The problem is caused by one or more of the fingers and/or metal tracks arching/corroding due to age and use so the electrical current cannot flow thus the ECU won't allow it to start.
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I would advise doing some basic checks before removing anything which are: 1. good battery voltage (low can use M+S lights) 2. starter relay (yellow, should click when key is turned can swap them around) 3. starter solenoid signal wire is 12v~ (red/brown wire and brown plug. use multimeter) and 4. check spade connector on starter (clean up). We have a full here about all those checks and also how to remove the starter motor as well:
• Land Rover Discovery 2...
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There are two different types of XYZ switches, the brown cover version has a set of micro switches but the black version as featured in this video is more simple and has copper fingers that run on top of metal tracks, over time these can wear, corrode and arch due to age however if you have the same type as us then after removing the switch it's an easy enough job to clean it up and get things back running again, we'll show you how to easily clean it without causing any damage. You can also bend the little fingers to give good pressure on the tracks, only a little though.
Once the switch is cleaned, we add some dielectric grease to the tracks and resembled using rivets, the switch was then refitted and everything is working as expected. If you have refitted the switch properly and still have M+S lights then you may need to clear some AT codes, turn ignition off then on.
I hope you have found this video help, if you have any questions please ask.
How to remove the xyz switch and refitting:
• Discovery 2 TD5 M+S Li...
Things you will need:
1. Electrical Contact Cleaner, make sure everything is super clean.
2. 2500 grit sandpaper, needs to be fine.
2. Dielectric grease, don't use Vaseline or anything else.
4. Some rivets or small bolts (nylock nuts).

[@mortazabonyadi5724]

thank you for your clip very thanks I am bonyadi of iran

[@Farmer2492]

hi great video i have a 2003 discovery TD5 auto i have just brought it but it has a crook gearbox it will drive when you put it in drive but wont change up gears and works perfect in reverse any ideas what it could be also are they hard to fit another gearbox thank you

[@DanielJohnHowTo]

have you checked the gearbox fluid level?

[@warrenfarming5663]

Great video did your discovery start and drive normal after cleaning xyz switch

[@DanielJohnHowTo]

Yes it did no issues currently, thanks.

[@mits4486]

Why is that greece there to lubricate

[@DanielJohnHowTo]

yes and to prevent corrosion forming on the tracks.