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Discussion Starter #1
Has anyone experienced their passenger complaining that the heated seat does not warm up
My wife and I went for a ride last night and on the way back she turned the seat heater on and said she could feel no difference (was on for about 3/4 of an hour) she tried both settings but could not feel anything. she was wearing riding Jean's. The symbel on the dash was lit up. I searched and found a thread on seat getting too hot but did not find any with my issue
Thanks
 

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Discussion Starter #3
Yeah it was my wife's favorite part of my old bike. I do know it is not an option to ignore it laughs
 

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visual check of the connectors are run an avo over the components
 

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Mine get quite hit in the high setting. If you have a GT with split rider/pillion seats, are the cables for both seats connected?
 

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Does the rear heat request show up on your dash indicator?
 

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I've found that it takes quite a while for the rider or pillion to feel the seat heat, but I would have thought 3/4 of an hour would have been enough! Check connection under the seat and turn on the rider heat as well and test them both on a longer ride.
 
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... The symbol on the dash was lit up.
visual check of the connectors are run an avo over the components
Mine get quite hit in the high setting. If you have a GT with split rider/pillion seats, are the cables for both seats connected?
Check connection under the seat and turn on the rider heat as well and test them both on a longer ride.
If the symbol for the dash is lit, that means the seat is connected. You can't get the symbol on the dash without it being connected since the switch itself is in the seat.

It is possible that part of the connector is broken, I suppose, but it can't be disconnected if the symbol is lit.
 

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Discussion Starter #11
It is a single seat I will try going for a longer ride this weekend
I will also try the heater for my seat to see if it heats up
Will advise after I go for a ride
Thanks
 

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It takes a little while to heat up but over 20 min should be enough use your hand and see if the rear matches your front part of the seat.

It's not uncommon for a wire inside the seat to fail that would show it working but not getting hot.





It is a single seat I will try going for a longer ride this weekend
I will also try the heater for my seat to see if it heats up
Will advise after I go for a ride
Thanks
 

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If you can't tell if it is working or not, it probably isn't. It's a seat heater, the seat should get clearly warmer.

If you want to verify, maybe you could measure the amp draw when you switch it on. I don't know what it is supposed to be, but I'd think it'd be pretty clear if it is working or not. I'd guess several amps, but not beyond what a digital multi meter will handle. You can estimate based on wire gauge.
 

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Discussion Starter #14
so I haven't been able to check it out any further (planned for Sat0 but if I need to replace the element(s) can I replace them with aftermarket without affecting the Canbus?
thanks
Ron
 

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If the symbol for the dash is lit, that means the seat is connected. You can't get the symbol on the dash without it being connected since the switch itself is in the seat.

This wasn't true for my GA. They swapped my seat and left the wire off. The switch worked (it is on the bag), and the light came on, but no heat.
 

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This wasn't true for my GA. They swapped my seat and left the wire off. The switch worked (it is on the bag), and the light came on, but no heat.
Aha..different setups....the GT/GTL switch is in the seat. If the connector is not connected, the switch is not connected either.

The OP didn't say which bike he had as far as I can tell.
 

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Discussion Starter #17
Aha..different setups....the GT/GTL switch is in the seat. If the connector is not connected, the switch is not connected either.

The OP didn't say which bike he had as far as I can tell.
sorry my mistake it is a GTL and yes it is in the seat
I haven't responded as my bike is at the dealer and hopefully I will have an answer tomorrow
 

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Discussion Starter #18
ok so I took my bike into a dealership (not BMW) and they determined that my bike is putting out 12 volts, but the seat is only receiving 7.4 which is why they are not heating up
however they do not have and cannot get the BMW wiring diagrams, so I will be making arrangements to take it to a BMW dealer (100 miles away)
oh well at least they did not charge me to find this out
 

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I don't think the wiring diagrams would have told them much.

The question is, why is the ECU instructing a low voltage to the seat heaters - if true, it makes no sense. My understanding is that the canbus shuts down seat heating completely in the event that it detects low voltage at start-up, but IIRC should then throw a warning symbol on the dash - I assume this is not present?

Keeping things simple, I have to see the battery as first suspect though. 12 volts standing, if correct, is a low reading; it should be showing around 12.6v. If you have a multi-meter, set it up to read battery voltage across the terminals - switch on the ignition & see what shows when the canbus checks out & the fuel pump runs up. Then, once settled, press the start button & see how far the voltage dips as she starts - my suspicion is that you will be looking at a significant drop. I can't recall the threshold for achieving a start off hand, but if you check back here doubtless someone can interject.

Alternatively, if you don't have a meter, why not get a battery specialist to check your battery quality. It could save you a long ride.
 

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Discussion Starter #20
I don't think the wiring diagrams would have told them much.

The question is, why is the ECU instructing a low voltage to the seat heaters - if true, it makes no sense. My understanding is that the canbus shuts down seat heating completely in the event that it detects low voltage at start-up, but IIRC should then throw a warning symbol on the dash - I assume this is not present?

Keeping things simple, I have to see the battery as first suspect though. 12 volts standing, if correct, is a low reading; it should be showing around 12.6v. If you have a multi-meter, set it up to read battery voltage across the terminals - switch on the ignition & see what shows when the canbus checks out & the fuel pump runs up. Then, once settled, press the start button & see how far the voltage dips as she starts - my suspicion is that you will be looking at a significant drop. I can't recall the threshold for achieving a start off hand, but if you check back here doubtless someone can interject.

Alternatively, if you don't have a meter, why not get a battery specialist to check your battery quality. It could save you a long ride.
I will give that a try...the shop is closed Mondays so I wont get it back till tomorrow
thanks for the advice
 
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