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Door Open Sensor Stopped Working

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

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WhatAmIDoing
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Door Open Sensor Stopped Working

Post by WhatAmIDoing » Fri Dec 28, 2018 12:58 am

Last week during a cold snap, the sensors that says whether the driver's door is open stopped working. Thought it would start working when it got warmer out, but alas it did not. Want to get this fixed since it messes with the alarm and now I have no courtesy lights. Problem is I cannot quite figure out how this system works. I don't see a button anywhere like I was expecting. How does the system work that tells the car whether the driver's door is open? Really hoping I do not have to pull the door panel off to fix this... :?

Also, my door check is bad. And when it's icy out, the door has a tendency to not want to latch closed. Not sure if either of those might have something to do with it.
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abscate
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Re: Door Open Sensor Stopped Working

Post by abscate » Fri Dec 28, 2018 4:45 am

I think the switch is buried in the driver door lock mechanism so it might be a door panel off operation. Not a big deal, you can still buy the plastic clips in case some break from age and get a clean reinstall.

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WhatAmIDoing
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Re: Door Open Sensor Stopped Working

Post by WhatAmIDoing » Wed Jan 16, 2019 7:19 pm

Interesting update: Dome lights now come on again when drivers door is open along with the green ignition light, but the floor courtesy light and the "don't forget your keys" chime are still not working. Also, the alarm still won't activate if I lock the doors from the master switch and then close it. I have to close the doors and lock with the key. Starting to think this switch might be way more complicated than I originally thought.

I may pull the door panel now once I get some replacement clips and take a look. Trying to get in quickly the other day, My boot caught the panel and ripped it part way off, breaking some of the clips.
'98 S70 T5M - 270,000+mi - forever a project
'99 S70 "AWD" - 218,000+mi - project
Knows enough to be dangerous :wink:

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Re: Door Open Sensor Stopped Working

Post by BEJinFbk » Wed Jan 16, 2019 11:28 pm

IIRC, there are two switches built into the door latches,
one for the security system and another for the lights.
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