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The button does not always work to engage the motor of the sunroof. I especially noticed it when the car's hot (Parked in the sun) so assumed it was a fuse problem, but then read the owners manual for the fuse location and saw that this is a fuse that rarely needs replacing.
My roof opened on Friday, but has refused to close all weekend; when I press the button, nothing happens, not even noise from the motor.
Is there any manual crank?
1994 Volvo 850. I have the owner's manual and the Haynes repair kit, but don't see anything about manually closing it
Sometimes the electronic control module goes to sleep. Usually happens when you always unlock the car with the remote. Trying locking and unlocking the driver door several time to see if it clears up.
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1. Place the ignition switch in the ON position.
2. Push and hold the sunroof switch toward 2 . Once the sunroof has reached the full tilt position, release the switch. Push and hold the switch toward the 2 position again. After a delay of four seconds, the sunroof will make a small movement and backup.
3. Release the switch.
4. Within 5 seconds of releasing the switch, push and continuously hold the switch toward 2 . The sunroof will move from the tilt position to the open position and back to the close position.
location:Its a flame trap it separates the oil from ai replacement:
1
Turn the Volvo 850 off and allow the engine and its components to cool for 30 minutes.
2
Open the hood of the Volvo 850 by pressing the hood release button within the vehicle. Locate the PCV valve; the valve is identified as a small rubber valve located on the engine crankcase. You will also notice a small hose sticking out of the end of the valve. If needed, read the Volvo 850 owner's manual for more information.
Disconnect the hose from the valve by pulling the hose out of the valve. The hose will come off the valve with minimal force.
4
Turn on the engine of the Volvo 850. Place your finger over the hole in the valve where the hose was connected. If you feel a strong suction, the valve is working properly and fine. If you do not feel a strong suction, the valve may be clogged and needs replacing.
5
Turn off the engine of the Volvo 850. Use needle-nose pliers and grip the valve. Pull the valve off of the crankcase.
6
Install a new valve by putting the valve in place on the crankcase. Insert the hose into the new PCV valve. Secure the new valve in place by pushing it down until it locks into place. Close the hood of the Volvo; pull up on the hood to ensure the hood is shut properly.
Not sure what year Volvo this is but some of the older ones they put in a manual close option but the newer Volvo does not have one, you would need to remove the motor and spin by hand. in order to do this the head liner must be dropped to get to sunroof motor.
In order to find out what's causing the problem, the headliner must be dropped (removed) to access the sunroof motor so it can be inspected and removed to inspect the slide cables up inside the sunroof/moonroof assy. Until that's done, there's not much more I can do to help except speculate.
First check your fuse box, for any fuse blow, position 26 in the Passenger Fuse Box (Box C), then keep in mind that the power sunroof is controlled by a switch that selects the
direction of travel of the sunroof. The switch changes the polarity of
the voltage going to the sunroof motor. This changes the rotation of the
motor, thereby changing the direction of sunroof travel.
REMOVAL & INSTALLATION (see Figure
1)
Open the sunroof to the ventilation position.
Disconnect the battery ground cable.
Push down the sunroof headlining with a finger. Unhook the
retaining springs with a bent piece of wire.
Pull down on the headlining sufficiently to pass beneath the
gutter rail. At the same time, slide the sunroof to the rear to release
the catches at the front.
Do not pull the sunroof too far to the rear; otherwise, it will be
difficult to remove again.
Unhook the spring retaining brackets.
Remove the retaining screws from the sides and front.
Remove the sunroof.
To install:
Fit the sunroof into position and install the retaining screws.
Install the spring retaining brackets.
Slide the sunroof forward to engage the catches in the front.
Install or reposition any trim moved for access.
Connect the negative battery cable.
Fig. 1: Exploded view of the sunroof assembly (click for zoom)
I think I know the answer....your gear has slipped on the cable a few teeth. Set the roof to the desired closed position, flush with your roof. Then open the panel above the mirror by first prying off the switch plate and removing the two 10mm bolts holding the mirror. Remove the sunroof motor gear, or rather just lower it out so it is disengaged with the cables. Now connect the switch and hit the auto open button as if you wanted to open the roof with single flick of the switch. Now hit the auto close button (same button of course, but the single touch method). The motor will advance and stop to where it thinks the roof should be, closed, which it is. Reassemble the gear into the slot, test it if all good, replace the mirror and panel.
Good luck.
Manfred.
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