2006 V70 Intermittent Central Locking driver rear door 30784980 Topic is solved

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive P2 platform cars sold as model years 2001-2007 (North American market year designations).

2001 - 2007 V70
2001 - 2004 V70 XC (Cross Country)
2004 - 2007 XC70 (Cross Country)
2001 - 2009 S60
2003 - 2007 S60 R
2004 - 2007 V70 R

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a3inverter
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2006 V70 Intermittent Central Locking driver rear door 30784980  Topic is solved

Post by a3inverter »

All,

On my 2006 V70 I have an issue where the driver side rear lock won't lock when the central locking button on the driver's side door is depressed OR when I use the key fob lock button. Once this happens, the central locking from the CLB functionality is disabled.

This is intermittent - usually every 5 or 6 times I lock/unlock. I can get it to start working again with a combination of manually locking and unlocking but it's a pain and makes me long for a car with manual locks (and ones where the rear door lock was positioned at the front of the door for each reaching :))

My reading suggests that this is either due to 1) some issue with the wiring harness as it enters the door or 2) the thermal fuse in the door lock actuator. I was going to explore both of these this weekend, but would like to understand if I need to disconnect the battery and if so, what the proper procedure is to avoid the dreaded SRS messaging that can only be reset by the dealership (or someone with VIDA/DICE).

Also, feel free to tell me if I'm barking up the wrong tree on this one.

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Post by a3inverter »

Update: Locking and unlocking the problematic door resets the situation. Until it happens again, then again, the manual method fixes it. So, all signs point to the drivers rear door module? Doesn't really sound like a thermal fuse issue...but I'm not an expert.

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Post by abscate »

I think I’m having this trouble on my 99 with the passenger door, so I’ll use this thread to troubleshoot, too

Actually, I won't. P80 99 and P2 completely different. Sorry for the noise, carry on.
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Post by 93SCMax »

I had this problem a few years back with my 2001. Same door. Replace the door lock actuator. I used a junk yard replacement. Still working great.

Don't forget to disconnect the battery prior to replacing, and use the re-install battery procedure so that the key fob, sunroof, etc. get reinitialized properly.

Good luck.

Added proper battery disconnect/reconnect procedure courtesy of Howardsvolvo:

http://howardsvolvos.webs.com/miscissues.htm#207347288

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Post by a3inverter »

Excellent. That was what I figured was the canonical reference for the procedure.

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Post by a3inverter »

Update: Got a door lock actuator out of a 2004 XC70 at the salvage yard and installed it. It's been working so far (longer than it would take for the old one to go into its failure mode) Pretty straightforward to install. I like the old style door clips better than the new (old had a center pin about 1/8" in diameter whereas the newer style is probably 1/16" - had to grind off the tip of a nail and use that). The only tricky part was where the rod from the exterior door handle gets clipped in.

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Post by a3inverter »

And...I followed the HowardsVolvo instructions for disconnecting/reconnecting the battery and all went according to plan. Thanks all!

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Post by 93SCMax »

Glad you got your issue resolved!

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Post by abscate »

A3 can you put the part number of the module into the first post title please?

Also, would love some inverted A3 pictures
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Post by a3inverter »

The handle is not what you think :)

The door module is...in the door so part number is obscured.

If we are to believe the FCP cross reference, a wide range of years can supply the appropriate part:

https://www.fcpeuro.com/products/volvo- ... 80#fitment

In this case, I grabbed one from a 2004 XC70. The only difference I could see was that the 2004 exterior door clip was blue and mine was black.

If I find myself with some extra time, I may investigate the one I replaced to find the cause of the issue.

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