Canbus??

[Jimmy90]

All. I'm not having much luck with search function. Is there a list of what lights are canbus or not on a 2010 XC90 rdesign? I'm wanting to upgrade the full interior lights (and possibly footwell lights) to led.

[SwissXC90]

Originally Posted by Jimmy90

All. I'm not having much luck with search function. Is there a list of what lights are canbus or not on a 2010 XC90 rdesign? I'm wanting to upgrade the full interior lights (and possibly footwell lights) to led.

All lamps are controlled by commands over the CAN bus

This can be proven by looking at VIDA: you can control 100% of all lamps in the vehicle using CAN bus commands to test if the lamps are working or not.

But I suspect that may not be the answer you are looking for... I suggest you rephrase your question to reflect what you are trying to find out.

[Jimmy90]

Unfortunately I don't have access to any software. I'm looking to replace the internal light bulbs /lamps for led bulbs. I know if you put canbus lamps in a non canbus socket they'll play up (flicker etc) and vice versa. I don't want to spend money buying the wrong lamp so I am hoping to find out (although you may have indirectly answered it there anyway) if I need a canbus lamp or non canbus lamp.

[Harley Dave]

I think the issue here is not whether the lamps are controlled by processors, which issue instructions over the canbus (as Swiss points out - all of them are) but whether a specific type of lamp is required to prevent an error being detected.

From my limited awareness of such things, the error detection is there so the "system" can detect, and let you know, that a lamp has blown.

I would assume this would normally be for (road) safety reasons so internal lamps may not be affected, unlike brake, head, side and indicator lamps which are.

If you choose to fit high impedance/resistance LED lamps - they will "look" to the processors as if they are blown open circuit or not there at all.

This is helpful as you can simply remove (one by one obv) the lamps you wish to "upgrade" to LED.

If you get no warning of lamp failure, you are probably OK to replace with "ordinary" LED

If you do get a warning then it may be necessary to use "canbus suitable" replacement LED lamps for that position.

They will probably have a ballast resistor incorporated to "fool" the processor into seeing the correct impedance/resistance and thus not triggering the warning.

Cheers

Dave

[SwissXC90]

Harley Dave is correct

Lamp failure detection is based on the current draw of a standard incandescent bulb.

Fitting any sort of bulb which draws much less current, such as an LED, will cause the vehicle to think the lamp has failed.
Solution is
1. either turn off the lamp failure detection (not possible in a Volvo)
2. or fit a load resistor to bring the current draw back up to what the system expects. This is the easiest solution for the Volvo XC90.

Generally, as Harley Dave says, all the exterior lamps are monitored, as they need to be working for road safety and vehicle compliance reasons.

Interior lamps are not monitored, and thus no warning occurs if they fail, are removed, or are replaced with any another type of lamp that uses less power (and consume less current).

[SwissXC90]

Originally Posted by Jimmy90

if you put canbus lamps in a non canbus socket they'll play up (flicker etc) and vice versa.

The lamps themselves are not, by any stretch of the imagination, a "canbus lamp"

Even when they are described as "canbus lamps", they are not.

They are nothing more than LED lamps with a load resistor, so that they can light up and heat up the car at the same time

Watch that heat dissipation, and be prepared for melted lamp sockets if the lamp has a resistor mounted on the LED lamp itself (which some do). They can get VERY hot under continuous operation, and cause damage to the lamp socket.

You may be better off with LEDs without resistors, and then experiment with the highest resistor value you can get away with (the higher the value, the lower the power consumption and the lower the heat) to prevent flicker. Start with something like 1000 ohms to help reduce the glow when the LED is off.
Yes, LEDs will flicker when on or glow when off due to the circuitry involved in switching the lamps.

[foeism]

Originally Posted by Jimmy90

Unfortunately I don't have access to any software. I'm looking to replace the internal light bulbs /lamps for led bulbs. I know if you put canbus lamps in a non canbus socket they'll play up (flicker etc) and vice versa. I don't want to spend money buying the wrong lamp so I am hoping to find out (although you may have indirectly answered it there anyway) if I need a canbus lamp or non canbus lamp.

Sorry to erect this thread, but did you manage to get any LEDs for the interior?
If so how did you find them, a worthy upgrade?

Thanks

[Jimmy90]

I changed all interior bar the footwells I think (not driven at night for ages ado can't recall)

I prefer it as far brighter. Found the originals very dull and now it's night and bright. The missus and kids don't agree with me as they say it's too bright.

[Harley Dave]

Take your shades off Jimmy

Cheers

Dave

[foeism]

Originally Posted by Jimmy90

I changed all interior bar the footwells I think (not driven at night for ages ado can't recall)

I prefer it as far brighter. Found the originals very dull and now it's night and bright. The missus and kids don't agree with me as they say it's too bright.

Sounds good! Where did you get them from?
Do you have a link?

Thanks