90 Quattro 20V (Canada) L5-2309cc 2.3L DOHC (7A) (1989)
Speedometer Head: Testing and Inspection
With Automatic Transmission
Speed sensor, checking
(vehicles with auto trans.)
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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set multimeter US 1119 to 20 V range
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connect red test lead of US 1119 to terminal 16 and black test lead to terminal 20
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switch ignition ON
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roll vehicle forwards and backwards approximately 4 feet
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voltage must vary between 0 and 12 volts (pulsing DC voltage)
If not OK
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check for break in wiring using wiring diagram OR
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replace speed sensor