Vanagon F4-1915cc 1.9L (Water Cooled) (1983)
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Connect US 1119 multimeter to following terminals of potentiometer (arrows)
3 and 4 or 6 and 9 = 500 to 1000 ohms
2 and 3 or 7 and 9 when moving sensor plate = resistance varies smoothly
Note:
If specifications are not reached, replace intake air sensor and readjust idle speed/CO value