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29th March 2024, 09:48 | #1 |
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k-bus issues from flooded satnav
so a few months ago i had a battery drain which i traced to the lowline sat nav unit in the boot being flooded. i removed this to let it dry out and it solved the problem. A couple days ago i went to plug the sat nav unit back in hoping it had dried out so i have it for pol, however it diddn't work and immediately after i had k-bus issues including the typical key fob not locking, "er" on climate control, no CD player, no indicators/ main beam indication lights.
so after some research i located the k-bus connector up behind the drivers kick panel and removed all connectors but 2,3 and 4 like instructed in this post https://www.the75andztclub.co.uk/for...=229444&page=2 but still no results. my first question is, is this even the right k-bus connector for the sat nav unit? or is it located somewhere else? https://photos.app.goo.gl/9vixA1bkntkSmSDX7 another thing i noticed was when removing the sat nav after the issues started, the top ground connection in the photo which goes to the sat nav in the boot was sparking. https://photos.app.goo.gl/xYNoREkU5usTk4JP7 Last edited by Archie75; 29th March 2024 at 09:51.. Reason: photos not working |
29th March 2024, 11:42 | #2 | ||
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Quote:
Quote:
If you unplug the navigation unit, is normal K-bus activity restored? Simon
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29th March 2024, 21:32 | #3 | |
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Quote:
Also turns out my poking around last night has left me without back lighting on my dials and buttons. Is this related to a connection on the kbus too? |
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30th March 2024, 07:10 | #4 | ||
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Quote:
That seems to rule out the navigation unit itself then. Check those earth connections! Quote:
Are your main beam and direction indicator warning lamps working correctly? Is the "door open" warning lamp working? Simon
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30th March 2024, 09:37 | #5 | |
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Quote:
Earth connections now all shiny but still no results. And no the main beam, indicator and door open lamps are not working. So with the backlighting does that mean I've put the ipk and lsm wires back in the wrong places? Is there any way to find out which of the wires are which? I also noticed in my kbus block that there is a wire with two ends that I'm guessing acts as a jumper between two pins. Do you know which positions they're supposed to be in? Last edited by Archie75; 30th March 2024 at 09:41.. |
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30th March 2024, 10:55 | #6 | |||
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Further research has revealed that this header (C0289) is divided into two sections; one for K-bus connections and the other for panel and switch illumination.
Quote:
Quote:
1 = Immobilisation ECU 2 = LSM 3 = Instrument pack 4 = BCU 5 = link to connector C0295 (more on this below) 6 = Sunroof ECU & rain sensor 7 = Parking distance control ECU 8 = link to 9 9 = link to 8 10 = Seat memory ECU C0295 has a further six K-bus connections as follows: 15 = link from C0289 16 = CD auto changer 17 = Symphony radio/cassette unit 18 = Low line Navigation unit 19 = Not used on your car 20 = Not used on your car By pursuing an error in RAVE I suspect that C0295 is a 20 pin rectangular blue header shown taped to C0289. In theory it doesn't matter which WRY (K-bus) wires go where on C0289 so long as pins 8 & 9 are linked and they're only using pins 1 to 10. Quote:
Regarding the loss of illumination on the instrument pack, this is fed on a RW wire from C0289 pin 15. Pins 11 to 14 should all have RW wires. Confused? Simon
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"Whatever is rightly done, however humble, is noble." Sir Henry Royce. Last edited by SD1too; 30th March 2024 at 11:29.. |
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30th March 2024, 22:02 | #7 | |
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Quote:
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1st April 2024, 16:31 | #8 |
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RESULT!! thankyou so much for all your help Simon. Unplugging pin 18 from the blue header was the one. All functions functioning. (Apart from the satnav haha).
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1st April 2024, 16:43 | #9 |
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Excellent, patience and persistence pays off!
Simon
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