here's more info.
when car is started u hear a rapid "click, click, click" sound coming from the passenger door . this lasts from 2 to 15 minutes and seems to last longer the colder
the ambient temp is ie. 30 vs 45 degrees.
i googled and found that this is a very common problem with this s60. most people say it is a defective relay in the PDM=passenger door module. this makes sense as the symptoms change with temp and the side mirror temp sensor goes thru the module too. some people say it is a broken relay or relay module resistor. Groton has a part # 944 1158 for a relay of unknown location for 20$ . dealer wants $400 for whole module. no way
i took door panel off and removed the module. it has the power window switch and door lock switch on top. when disconnected, the clicking stops. i separated the top from the bottom of the module and i see 2 circuits boards, 1 on each half. i can remove the boards and send photo of them if this will help. i hope it is a defective relay and or resistor that i can remove and solder a new one in for a few bux. car belongs to daughter who heads back to college soon, many thanks, mike