80 Quattro L5-2309cc 2.3L SOHC (NG) (1988)
Speedometer Head: Testing and Inspection
With Manual Transmission
Speed sensor, checking
Note: Sensor is located on left side of transmission near drive shaft flange.
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remove instrument cluster
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remove 26-point connector (blue) from instrument cluster and insert in test adaptor VW 1594/16
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connect US 1119 between terminals 20 and 21
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set US 1119 to ohm scale
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place transmission in neutral and apply parking brake
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secure vehicle with wheel chocks to prevent rolling
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raise left front of vehicle at proper lift point until wheel turns freely
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place jack stand under vehicle for safety
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slowly rotate wheel
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reading on US 1119 must vary between 0.0 ohm and infinity
If specified value is not obtained,
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repair wiring according to current flow diagram OR
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replace defective speed sensor