VIP keyless entry system fob won’t lock: 1997 80 Series (1 Viewer)

[agf95]

I have a factory VIP keyless entry system (a non-alarm unit, keyless only) in my ‘97 80. Until today the fob (the later 2 button unit) has worked to lock and unlock the doors normally, however today it will only unlock. The lock function doesn’t work, as if the car thinks there’s a door open. Any help in figuring out where to start troubleshooting is appreciated. I have already determined that all the buttons that control the courtesy lights/ door open lights seem to work normally. Thanks!

 

[agf95]

Update: when I press the fob button when I’m in the car I can hear something behind the dash clicking both when it unlocks AND when I press it the second time, when it should lock but doesn’t. Seems like the fob signal is triggering something in the dash even though it’s not actually locking the doors…

 

[agf95]

In case anyone has the same problem and finds this, the problem was the door control unit: part number 85980-60110. It's easy to replace-- behind the driver door card at the bottom outer corner, but replacement can be done without removing the door card.

 

[i4c4lo]

$416 part?

 

[agf95]

$416 part?

Yep, ridiculous. I had a good used one. There aren’t any used listed online that I found, but if you find someone parting out you’d probably get one cheap. Also the module snaps open very easily and I’d be willing to bet a cleaning or some simple soldering could fix it…