XK / XKR ( X150 ) 2006 - 2014

Hard reset

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Old Jul 19, 2025 | 02:51 PM
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Default Hard reset

Seen it posted several time, but when I search the forums for hard reset x150 or xk I get x100 or other random models.
looked in sticky DIY and nada.

can anyone throw me a bone?
 
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Old Jul 19, 2025 | 02:57 PM
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Just means a battery disconnect for a couple of minutes - some like to short the two cables together when disconnected
 
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Old Jul 19, 2025 | 03:34 PM
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I thought there was a long post touching the cables together sequence.
like start car, idle 2m
put in drive, foot on break x mins
then go drive x miles
to recalibrate everything.

i know i saw a link but can’t for the life of me find it.
 
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Old Jul 19, 2025 | 07:47 PM
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Originally Posted by Circumnavigator
I thought there was a long post touching the cables together sequence.
like start car, idle 2m
put in drive, foot on break x mins
then go drive x miles
to recalibrate everything.

i know i saw a link but can’t for the life of me find it.
Does this mean that you bought the red one?
 
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Old Jul 19, 2025 | 08:05 PM
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Originally Posted by SDCR_XK
Does this mean that you bought the red one?
Ha! No. But I am second guessing myself.

I'm teetering between my insane level of integrity and candor, and being still on the fence.
Was going to text him the hard reset steps. See if it cleared all the codes.
Still may. The top not working which turned out to be just a safety feature I didn't know about and all the codes I posted in the "Unicorn" thread are the main reasons I walked.

But I'm struggling with telling him how to fix the code issues or at least see if they are legit or because they started the car weekly but never drove it.
Having no mechanical issues would easily fetch him 2k more.
 

Last edited by Circumnavigator; Jul 19, 2025 at 08:08 PM.
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Old Jul 19, 2025 | 10:25 PM
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Here's the right way to do a hard reset, from @Brutal , a Jaguar Tech who knows his stuff:

https://www.jaguarforums.com/forum/x...eset-ecu-4258/

 
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Old Jul 19, 2025 | 10:30 PM
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Originally Posted by Stuart S
Here's the right way to do a hard reset, from @Brutal , a Jaguar Tech who knows his stuff:

https://www.jaguarforums.com/forum/x...eset-ecu-4258/
Oh man...I am no qualified tech but touching a ground to the battery makes the hair in my nostrils stand out and puckers me up.

I will just settle for removing the cables, crossing them for a solid 15 minutes and then re-attaching. I find that clears the capacitors.

Buy your mileage may vary.
 
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Old Jul 19, 2025 | 11:05 PM
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Originally Posted by Stuart S
Here's the right way to do a hard reset, from @Brutal , a Jaguar Tech who knows his stuff:

https://www.jaguarforums.com/forum/x...eset-ecu-4258/
Gracias. Wife asked about the code earlier when I was describing it.
does the stock head unit need a code?
 
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Old Jul 19, 2025 | 11:40 PM
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Originally Posted by Circumnavigator
Gracias. Wife asked about the code earlier when I was describing it.
does the stock head unit need a code?
Nope. (If you’re asking about an unlock code that some car makers require.)
 

Last edited by kj07xk; Jul 19, 2025 at 11:41 PM.
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Old Jul 21, 2025 | 07:12 AM
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:-)

The REASON you disconnect the battery leads, then touch them - is to clear all the capacitance in the system. There are other ways of getting it done too.
 
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Old Jul 21, 2025 | 12:07 PM
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Originally Posted by Circumnavigator
Ha! No. But I am second guessing myself.

I'm teetering between my insane level of integrity and candor, and being still on the fence.
Was going to text him the hard reset steps. See if it cleared all the codes.
Still may. The top not working which turned out to be just a safety feature I didn't know about and all the codes I posted in the "Unicorn" thread are the main reasons I walked.

But I'm struggling with telling him how to fix the code issues or at least see if they are legit or because they started the car weekly but never drove it.
Having no mechanical issues would easily fetch him 2k more.
The codes don't concern me much, lots of reasons for them, battery, sitting, not running, not driving, etc. Cars don't like that. But you described the interior as rough which I reckon could get expensive if done right and you mentioned the paint might be in poor condition (common with red paint) that paint correction cant fix. Also keep in mind PDR on alloy's different than steel, not all can do it correctly AND these cars have multiple glued layers of sheet metal which make it difficult to impossible;e to repair with PDR.
 
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