90CS Quattro V6-2.8L (AAH) (1994)
Speedometer Head: Testing and Inspection
Speedometer Vehicle Speed Sensor (VSS), Checking
Speedometer Vehicle Speed Sensor (VSS), checking
Location: left side of transmission housing next to drive flange.
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Disconnect 3-pin harness connector (arrow) from speedometer VSS.
Note: The connector is secured to the speedometer VSS with locking clips.
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Connect VW 1501 test harness to VSS.
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Set digital multimeter (Fluke 83 or equivalent) to the 2 kohm resistance measuring range.
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Connect multimeter between VW 1501 test harness flat terminal connectors -2- and -3-.
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Release parking brake and shift transmission into neutral.
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Move vehicle forward or backward slightly.
Specification: alternating between 0 Ohms (continuity) and infinite Ohms (no continuity)
If specification is not met:
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Replace speedometer Vehicle Speed Sensor (VSS).
If resistance is OK, and the speedometer is not working:
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Measure signal from speedometer VSS signal at instrument cluster. See: Speedometer Vehicle Speed Sensor (VSS) Signal, Checking
Once test is complete:
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Disconnect VW 1501 test harness and reconnect connector to speedometer VSS.