C70: - C70 Roof ECU location

Taffyred · Apr 29th, 2010, 23:43

Anyone know the location of the roof control / ECU on a 2003 C70 ragtop. Garage have finally tracked down the cause of the non functioning roof and told that they tried another control unit and roof worked fine. They quoted me £1200 for new ECU, advised me to find a part cheaper and they would fit it for me. Got the part now want to fit myself, simple job of 4 plugs and 2 screws, just need to know where in the car it goes.

Cheers

Darren

lordyfox · Apr 30th, 2010, 17:32

In the boot area, I think behind one of the side panels. I also think you will need it programmed to the car and syncronised with the roof?

I am sure someone els may confirm this.

Taffyred · Apr 30th, 2010, 17:57

hoping that it will just be a case of fitting the unit and pressing the roof button, otherwise it will be off to the garage again so they can charge another 50 quid for an hours labour that last 15 mins lol

lordyfox · May 2nd, 2010, 20:02

If you need further help I can try and email you the notes from a Vadis workshop book. I note we are almost neighbours!

Taffyred · May 3rd, 2010, 01:00

Found it!, its drivers side next to the rear light cluster. Dead easy to fit however now it needs to be synchronised. Roof only opened half way and then had to close it manually. Looks like it will have to go Volvo now anyway.

Chris_Rogers · May 3rd, 2010, 07:58

If you keep trying it it may adapt eventually.

Taffyred · May 3rd, 2010, 19:09

Had thought about it, but am a bit worried that continued failures may blow the unit (the last one just failed with no warning). Managed to get this one off ebay for £65 and dont relish the prospect of having to find another. Cheapest 2nd hand unit from a parts supplier was £175 and only managed to find 2 for sale. My local independant specialist is very fare so I'll let him take the strain. He breaks it he fixes it lol.

Ray Woodward · Oct 25th, 2019, 19:27

Hi,

I have just read about the fun you’ve been having with your roof. I have a 2004 C70 convertible with window problems which I hope can be resolved by changing the roof module. Like you, I have acquired a replacement from Ebay but don’t know where it’s located. I was warned to take care because of hydraulics etc, You mentioned it’s on the driver’s side near the rear light cluster. Does all the trim come away easily? Also, how did the electronic re-programming turn out?

Cheers,

Ray

smithy1981 · Nov 24th, 2019, 15:57

Hi guys new to site, my roof and windows do nothing and the button on the dash does not light up for the roof on a c70 2005 auto, power to all 3 motors 2 at back and one at the front work when power sent direct but will not do anything, fuses are ok and apparently power is getting to the switch, i took apart boot lock and the remote and manual lock wont work so i cant get in to the boot either any ideas the switch inside does nothing and button on key was tempermental at first. any manual way apart from the key to get in? after reading above im womdering if its the ecu with these symptoms thanks in advance

burgess · Dec 20th, 2019, 02:13

First, the first gen C70 Cabrio roof has five motors and two for the storage lid, that's seven motors in total.

The convertible top will not open or close if the boot lid is open.
So if the signal from the boot lock module is telling the roof control module that the lock in not in the closed position, the roof will not operate.

The C70 is delivered with two remote control fobs and two types of keys:
Master keys (2) have black edged light grey rubberised grip.
Service key (1) has black rubberised grip

Boot lid unlocking from outside with the Remote control fob pressing button twice within 3 seconds.

Master Keys operate the ignition, opens drivers door lock, the glove compartment lock, and the boot lid lock.
The Service key only operates the ignition and the drivers door lock.

Private locking of the boot lid:
By turning the master key anti-clockwise from the vertical to horizontal in the boot lid. The lock will enter the private locked position. When in this position, the boot lid cannot be opened by a service key, by the remote control fob, or by the opening switch in the driver's door.

Resetting the boot lid from the private position can only be done with the master key.
Turn the key from the horizontal through 180 degrees and then back to vertical.

Apr 29th, 2010, 23:43	#1
Taffyred New Member Last Online: Oct 14th, 2019 00:33 Join Date: Aug 2008 Location: Bridgend	C70 Roof ECU location Anyone know the location of the roof control / ECU on a 2003 C70 ragtop. Garage have finally tracked down the cause of the non functioning roof and told that they tried another control unit and roof worked fine. They quoted me £1200 for new ECU, advised me to find a part cheaper and they would fit it for me. Got the part now want to fit myself, simple job of 4 plugs and 2 screws, just need to know where in the car it goes. Cheers Darren __________________ 2003 C70 2.0T Convertible

Apr 30th, 2010, 17:32	#2
lordyfox New Member Last Online: Sep 4th, 2023 16:39 Join Date: Sep 2009 Location: Pontypridd	In the boot area In the boot area, I think behind one of the side panels. I also think you will need it programmed to the car and syncronised with the roof? I am sure someone els may confirm this.

Apr 30th, 2010, 17:57	#3
Taffyred New Member Last Online: Oct 14th, 2019 00:33 Join Date: Aug 2008 Location: Bridgend	hoping that it will just be a case of fitting the unit and pressing the roof button, otherwise it will be off to the garage again so they can charge another 50 quid for an hours labour that last 15 mins lol __________________ 2003 C70 2.0T Convertible

May 2nd, 2010, 20:02	#4
lordyfox New Member Last Online: Sep 4th, 2023 16:39 Join Date: Sep 2009 Location: Pontypridd	Help If you need further help I can try and email you the notes from a Vadis workshop book. I note we are almost neighbours!

May 3rd, 2010, 01:00	#5
Taffyred New Member Last Online: Oct 14th, 2019 00:33 Join Date: Aug 2008 Location: Bridgend	making progress Found it!, its drivers side next to the rear light cluster. Dead easy to fit however now it needs to be synchronised. Roof only opened half way and then had to close it manually. Looks like it will have to go Volvo now anyway. __________________ 2003 C70 2.0T Convertible

May 3rd, 2010, 07:58	#6
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	If you keep trying it it may adapt eventually.

May 3rd, 2010, 19:09	#7
Taffyred New Member Last Online: Oct 14th, 2019 00:33 Join Date: Aug 2008 Location: Bridgend	Had thought about it, but am a bit worried that continued failures may blow the unit (the last one just failed with no warning). Managed to get this one off ebay for £65 and dont relish the prospect of having to find another. Cheapest 2nd hand unit from a parts supplier was £175 and only managed to find 2 for sale. My local independant specialist is very fare so I'll let him take the strain. He breaks it he fixes it lol. __________________ 2003 C70 2.0T Convertible

Oct 25th, 2019, 19:27	#8
Ray Woodward New Member Last Online: Mar 16th, 2024 17:11 Join Date: Oct 2019 Location: Hull	C70 Roof module Hi, I have just read about the fun you’ve been having with your roof. I have a 2004 C70 convertible with window problems which I hope can be resolved by changing the roof module. Like you, I have acquired a replacement from Ebay but don’t know where it’s located. I was warned to take care because of hydraulics etc, You mentioned it’s on the driver’s side near the rear light cluster. Does all the trim come away easily? Also, how did the electronic re-programming turn out? Cheers, Ray

Nov 24th, 2019, 15:57	#9
smithy1981 New Member Last Online: Nov 24th, 2019 15:57 Join Date: Oct 2019 Location: wellingborough	Help Hi guys new to site, my roof and windows do nothing and the button on the dash does not light up for the roof on a c70 2005 auto, power to all 3 motors 2 at back and one at the front work when power sent direct but will not do anything, fuses are ok and apparently power is getting to the switch, i took apart boot lock and the remote and manual lock wont work so i cant get in to the boot either any ideas the switch inside does nothing and button on key was tempermental at first. any manual way apart from the key to get in? after reading above im womdering if its the ecu with these symptoms thanks in advance

Dec 20th, 2019, 02:13	#10
burgess Member Last Online: Jan 11th, 2024 12:31 Join Date: Sep 2015 Location: TYWYN	First, the first gen C70 Cabrio roof has five motors and two for the storage lid, that's seven motors in total. The convertible top will not open or close if the boot lid is open. So if the signal from the boot lock module is telling the roof control module that the lock in not in the closed position, the roof will not operate. The C70 is delivered with two remote control fobs and two types of keys: Master keys (2) have black edged light grey rubberised grip. Service key (1) has black rubberised grip Boot lid unlocking from outside with the Remote control fob pressing button twice within 3 seconds. Master Keys operate the ignition, opens drivers door lock, the glove compartment lock, and the boot lid lock. The Service key only operates the ignition and the drivers door lock. Private locking of the boot lid: By turning the master key anti-clockwise from the vertical to horizontal in the boot lid. The lock will enter the private locked position. When in this position, the boot lid cannot be opened by a service key, by the remote control fob, or by the opening switch in the driver's door. Resetting the boot lid from the private position can only be done with the master key. Turn the key from the horizontal through 180 degrees and then back to vertical.

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