Quote:
Originally Posted by mcdode
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check this thread for ground points all over car:
http://www.toyotanation.com/forum/sh....php?p=3230226
i don't know which ones are primarily used by wiper motor but it miay be inside cabin or under hood, lots of them in those 2 spots. to make it easier also make sure the ground point used by Engine Coolant Temp sensor is good and clean since you had P0125, maybe they share a common ground point maybe not, worth checking.
P0125 usually means that ECT sensor (one used by ECU) is reporting constantly low coolant temperature (cold) and is an indication of a bad sensor. you should test it with a multimeter to see what it says when cold and (supposedly) hot.
You could also use OBD2 scanner software and cable for laptop/netbook to see what computer sees on input from that sensor. you may have more codes as pending (not yet stored).