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Mar 18, 2017 14:03:30 GMT
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I've fitted a rather nice electrically adjusted and heated seat into my van from a Renault Laguna 2.
Luckily it's in aprox the right position for me but I would to be able to adjust it. It looks like there is some type of ECU strapped under the seat but I don't really want to power it up incase I fire the seat airbags by mistake as I have no idea on colour coding etc
I've tried feeding 12v to the motor but nothing happened? Does it need a PWM driver or some such trickery?
Is it likely to need a controller for the seat heating too?
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squonk
Part of things
Posts: 862
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Mar 19, 2017 11:34:00 GMT
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I have a 2007 Laguna 2. I am led to believe that all of the electrics are on a CAN BUS with various ECU's for different functions coded to and talking to each other. I suspect the box under the seat is the 'out station' that takes the CAN messages and produces control functions from them. In which case your chances of making that box work are practically zero!!
I would pull off one of the motors and have a play with it on the bench - it should work when powered by a suitable high current 12v supply. Then you will have to make up your own control circuitry to get the seat functions to work.
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2004 Chevrolet Avalanche Z71
2005 Mercedes CLK320 Cabriolet
1996 Mercedes C180 Elegance Auto Saloon
1996 Rover 620Ti (Dead fuel pump)
1992 Toyota HiLux Surf
1987 Range Rover Vogue (Rusty)
1992 Range Rover Vogue SE (More Rusty)
2006 Chrysler Grand Voyager
2008 Corsa 1.4 Design
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fad
Posted a lot
Posts: 1,781
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Mar 19, 2017 11:57:46 GMT
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I have a 2007 Laguna 2. I am led to believe that all of the electrics are on a CAN BUS with various ECU's for different functions coded to and talking to each other. I suspect the box under the seat is the 'out station' that takes the CAN messages and produces control functions from them. In which case your chances of making that box work are practically zero!! I would pull off one of the motors and have a play with it on the bench - it should work when powered by a suitable high current 12v supply. Then you will have to make up your own control circuitry to get the seat functions to work. This. You've no chance of emulating can bus protocols. Get at the live on the motor and use relays and your own switch panel. |
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Mar 19, 2017 14:45:27 GMT
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I've tried a direct feed from a 12v battery to the motor with no result?
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fad
Posted a lot
Posts: 1,781
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Mar 19, 2017 15:15:23 GMT
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Is there just a pair of wires on the motor?
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Mar 19, 2017 15:22:16 GMT
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Mar 19, 2017 17:23:18 GMT
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Just to throw a spanner in the works, isn't an adjustable seat now part of an MOT?
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Mar 19, 2017 18:55:57 GMT
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Just to throw a spanner in the works, isn't an adjustable seat now part of an MOT? No just required to be securely fixed and not obviously defective Is there just a pair of wires on the motor? Yes just the 2 wires which was why I was surprised it didn't work |
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Last Edit: Mar 19, 2017 19:01:28 GMT by dodgerover
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fad
Posted a lot
Posts: 1,781
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Mar 19, 2017 19:05:34 GMT
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One is a live, one a switched live, earthed through the case? Or one clockwise, one anti clockwise, earthed through case?
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Last Edit: Mar 19, 2017 20:10:46 GMT by fad
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squonk
Part of things
Posts: 862
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Mar 19, 2017 19:06:35 GMT
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This is a circuit I put together to replace a faulty seat controller on a Range Rover. You should be able to adapt it easily for your seats:  |
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2004 Chevrolet Avalanche Z71
2005 Mercedes CLK320 Cabriolet
1996 Mercedes C180 Elegance Auto Saloon
1996 Rover 620Ti (Dead fuel pump)
1992 Toyota HiLux Surf
1987 Range Rover Vogue (Rusty)
1992 Range Rover Vogue SE (More Rusty)
2006 Chrysler Grand Voyager
2008 Corsa 1.4 Design
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fad
Posted a lot
Posts: 1,781
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Mar 19, 2017 20:09:48 GMT
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Not till he works out how to make the motor move he can't.
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Mar 19, 2017 20:23:43 GMT
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it'll be the same as a window motor, so if you want to move it you need to give it an earth as well as a live, very easy.
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squonk
Part of things
Posts: 862
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Mar 19, 2017 21:02:06 GMT
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Not till he works out how to make the motor move he can't. Thanks for pointing that out, I had no idea  dodgerover: do you have a multimeter? Check the resistace of the motor. It will probably be somewhere between 2 ohms and 15 ohms depending on the motor design. If the resistance falls somewhere in this range the motor is probably Ok. Presumably its connected to some kind of reduction gearbox? Possibly this has siezed. |
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2004 Chevrolet Avalanche Z71
2005 Mercedes CLK320 Cabriolet
1996 Mercedes C180 Elegance Auto Saloon
1996 Rover 620Ti (Dead fuel pump)
1992 Toyota HiLux Surf
1987 Range Rover Vogue (Rusty)
1992 Range Rover Vogue SE (More Rusty)
2006 Chrysler Grand Voyager
2008 Corsa 1.4 Design
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fad
Posted a lot
Posts: 1,781
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Mar 19, 2017 21:04:26 GMT
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Not till he works out how to make the motor move he can't. Thanks for pointing that out, I had no idea Cant work out if I have upset you there or not? |
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squonk
Part of things
Posts: 862
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Mar 19, 2017 21:26:53 GMT
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No, not at all - just me being sarcastic!!!
Sorry!
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2004 Chevrolet Avalanche Z71
2005 Mercedes CLK320 Cabriolet
1996 Mercedes C180 Elegance Auto Saloon
1996 Rover 620Ti (Dead fuel pump)
1992 Toyota HiLux Surf
1987 Range Rover Vogue (Rusty)
1992 Range Rover Vogue SE (More Rusty)
2006 Chrysler Grand Voyager
2008 Corsa 1.4 Design
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Mar 19, 2017 21:41:11 GMT
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it'll be the same as a window motor, so if you want to move it you need to give it an earth as well as a live, very easy. I tried a +ve and -ve feed to the wires coming out of the motor, I didn't think of trying an earth to the body |
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fad
Posted a lot
Posts: 1,781
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Mar 19, 2017 21:42:13 GMT
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it'll be the same as a window motor, so if you want to move it you need to give it an earth as well as a live, very easy. I tried a +ve and -ve feed to the wires coming out of the motor, I didn't think of trying an earth to the body Thats what I meant up there ^^^ |
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Mar 20, 2017 11:56:15 GMT
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Just to throw a spanner in the works, isn't an adjustable seat now part of an MOT? No just required to be securely fixed and not obviously defective Is there just a pair of wires on the motor? Yes just the 2 wires which was why I was surprised it didn't work Not so - My P100 failed it's 1st MOT when I finished building it as the seat could not be adjusted forward or back. (I used modded Cossie runners) It was the only failure point too. When I questioned it, he said that some wouldn't fail it but should. I changed the runners over to a proper P100 one and it sailed through. |
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96 E320 W210 Wafter - on 18" split Mono's - Sold :-(
10 Kia Ceed Sportwagon - Our new daily
03 Import Forester STi - Sold
98 W140 CL500 AMG - Brutal weekend bruiser! Sold :-(
99 E240 S210 Barge - Now sold
02 Accord 2.0SE - wife's old daily - gone in PX
88 P100 2.9efi Custom - Sold
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Mar 20, 2017 13:30:07 GMT
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Yep you are right, not come across that before.
Reason for rejection
The driver’s seat fore and aft adjustment mechanism not functioning as intended.
However it says specialist modifications to be accepted so I also read that as: if presented with no method of adjustment, ie switches removed or bucket seats bolted in position it would be pass and advise, I'm sure one of the testers on here could give us their take.
Luckily it was tested just before I fitted it and it's mounted on the van runners so just the recline function is motor driven on mine.
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Last Edit: Mar 20, 2017 13:31:34 GMT by dodgerover
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Mar 21, 2017 15:08:39 GMT
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Sorry didn't mean to cause you more grief!
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