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Old 01-04-2013, 06:27 PM
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First time First time is offline
Location: in my house
Join Date: May 2010
Posts: 549
Mein Auto: 2001 540i sport/1994 525i
This temp switch switches a ground circuit for the timing and idle control.

Oh forgot here is the test procedure:
-Disconnect the white wire(s) from the switch
-check for continuity between the switch terminal corresponding to the white wire and ground
-at coolant temps below 86 F there should be no continuity
-coolant temps above 118F there should be continuity (switch closed)
Any faults or values out of spec should be addressed by replacing sensor.
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