C70 Hardtop stuck partially open Topic is solved

baughpd · Post by **baughpd** » 27 Mar 2017, 10:56

I stopped my roof partially open in order to glue the back headliner. Now it does not open or close. I tried the procedure in the manual of holding either of the buttons down for a minute and I also tried disconnecting the battery. Here are the messages displayed and here are the results of the scanner:

The car is undriveable at this point. Any suggestions are appreciated.

Messages
After starting engine = “roof not locked”
After pushing up or down button = “roof failure see manual”
After holding down button for 30 seconds = “roof failure service required”

Scanner , CRM - convertible roof module
Read DTC = no DTCs
Read Datastream
Hydraulic pump temp = low
Hydraulic pump = stopped
Valve 1 =closed
Valve 2 = closed
Valve 3 = closed
Valve 4 = closed
Catch motor = unlocked
Supply voltage = 14.1
Button open roof = button not pressed (while pushing button = button pressed)
Button close roof = button not pressed (while pushing button = button pressed)
Button load aid = button not pressed
Auto up window lifts = normal operation
Messages in DIM = 14 (when pressing either button = 13)
Position = roof opening preparations (when pressing either button = no match)
Head lamp washer = normal operation (when either button pushed = inhibited)
Speed limitations km/h = 2 km/h
Speed limitations mph = 1.24 mph
Ambient temp = 27
Hall sensor 1 = passive
Hall sensor 5 = passive
Hall sensor 3 = passive
Hall sensor 6 = passive
Hall sensor 7 = passive
Hall sensor 19 = passive
Hall sensor 9 = passive
Hall sensor 20 = Active
Hall sensor 11 = passive
Hall sensor 12 = Active
Hall sensor 13 = passive
Hall sensor 18 = Active
Hall sensor 15 = passive
Hall sensor 16 = Active
Position encoder2, rear roof = intermediate 1
Position encoder 17, front roof = intermediate 2
No. of roof manoeuverings = 417
No. of electrical overrides = 7

baughpd · Post by **baughpd** » 28 Mar 2017, 09:19

FYI - I got it working again. I tried to jog the CRM brain by driving it a few feet until the warning chime started. But that did not do anything. Then I reached into the trunk and loosened the plastic divider. I started the engine and pushed the down button. The message about a loose divider appeared. I reached back into the trunk and closed the divider. Then I hit the down button. It started moving but only about halfway down. Then I hit the other button and it closed all the way. Then I hit the other button and it went all the way down this time.

Post by **jimmy57** » 28 Mar 2017, 10:00

Great!
The CRM has impact protection and it stops if it doesn't have position sensor and position switch (actually Hall sensors) conditions that are approved (gateway checkpoints effectively).
I think what really let you get it to work is your moving car let one of those indicators get back into safe situation and it let you move it until it got to another gateway checkpoint position and stopped. Then it let you do an override close. Opening is less likely to be enabled but closing is allowed with wider tolerances. Once it closed the whole set was in correct states so it resumed normal function. The solenoids in the pump assembly are not 100% sealed forever and do leak a bit.

baughpd · Post by **baughpd** » 28 Mar 2017, 14:32

Thanks for the reply, but moving the car did no good. I tried several other things the day after I moved it and nothing happened until I loosened the divider in the trunk.

sithum31 · Post by **sithum31** » 03 Dec 2018, 06:04

Hi guys hope you can help me i have a volvo c70 2010, it had a burst hydraulic hose and i put a new one, everything was fine and it worked for 4,5 times but now for some reason the bootlid is not locking i tried a another motor aswell, if you disconnect the bateery boot lid will lock just once but then it doesnt want to lock untill you disconnect the battery and put it back

Post by **Krons** » 07 Jan 2023, 16:16

Anyone have a diagram on where the hall sensors are located on a C70?

Opened fine, got the error trying to close it. I was able to close the top but looks like I have wiring to check.

: B7EF1F22-DD33-4708-8418-47DB9E5B27E7.jpeg (1.02 MiB) Viewed 2400 times

Post by **Krons** » 12 Jan 2023, 21:27

Krons wrote: ↑07 Jan 2023, 16:16 Anyone have a diagram on where the hall sensors are located on a C70?

Opened fine, got the error trying to close it. I was able to close the top but looks like I have wiring to check.
B7EF1F22-DD33-4708-8418-47DB9E5B27E7.jpeg

I was able to track down some excellent information here, may be useful to others:
https://www.volvoclub.org.uk/volvo_workshop-c70.shtml