1999 Volvo S40, 5 speed, Petrol.
Car has a push button electronic switch that opens & closes the fresh air vent. When the button is pushed to the ''Vent Open'' position, a loud clicking noise occurs. It seems like something is trying to move. Fresh air does enter however. No clicking happens when the switch is in the ''Vent Closed'' position.
Any guidance will be appreciated.
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Re: Electronic vent control not working in Volvo S40
I think here, by your description, that there might be something that has slipped inside the vent holes from outside. you can try to blow some compressed air through the vent holes at the bottom of the windscreen.
Otherwise you can try to look under the dash, activate the switch and see if you can locate from where the noise is coming and see if you can reach the mechanism that control the vent. Normally it must be moving free. Otherwise your local mechanic should be able to fix that ufor you.
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Hi Mike , what have you check so far ? fuse's , do you have the switches on the steering wheel or the column ? Does the CC light on the dash light up when push the on Button ?
ELECTRONIC SPEED CONTROL SYSTEM
There's a plunger switch at the top of the tailgate that is pushed in as the tailgate is closed. Try pressing it by hand several times and see if the problem clears up. A quick spray of electronic contact cleaner might also help. As a final fix, remove the switch (2 screws), check the wires/connections. If the switch is bad you can get an exact replacement from Volvo or a pretty close replacement from your local auto parts store.
This sounds like the control panel. 90% of the time something gets spilled on the control panel from the cup holders right above, The buttons get gummed up and no longer push the switches behind the button. remove the control panel and dissassemble it, soak the non electronic parts in hot water with light soap, problem solved, My 98 Outback had the same problem.
According to the 2003 owner's manual (2004 should be similar) there is a specific procedure for calibrating the moon-roof's controller. The electronic controller may have lost its calibration settings due to an electrical glitch or disconnected battery.
Look up he exact procedure in your owner's manual as it may vary between different mdel years or OEM moon-roof suppliers.
the door opening & closing on Max a/c is the inside/outside air intake door.
The temp blend door is the one you are concernd about. It says you have to remove instrument panel for access. ouch!!!
------------------------------------- A/C Electronic Door Actuator Motor
The A/C electronic door actuator motor (19E616) is located on top of the A/C evaporator core housing assembly.
Its function is to move the A/C air temperature control door on command from the control assembly.
The A/C electronic door actuator motor contains a reversible electric motor and a potentiometer. The potentiometer wiper is connected to the actuator output shaft and moves with the output shaft to indicate the position of the A/C air temperature control door.
Battery voltage is applied to the ends of the potentiometer. The voltage available at the wiper indicates the position of the potentiometer. The actuator wiper voltage is sent to the control module and matched with the wiper voltage of the module potentiometer. The printed circuit board then drives the actuator motor in the direction necessary to make the actuator wiper voltage agree with the control module wiper voltage.