Volkswagen Passat 1995 Official Factory Repair Manual page 1315

Components of engine, checking
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Test sequence
- Disconnect 3-pin harness connector -
2- to engine speed (RPM) sensor -1-.
- Measure sensor resistance between
terminals 2 + 3 at connector to
sensor.
Specified value: 480 to 1000
- Check sensor for short circuit
between terminals 1 + 2 as well as 1
+ 3.
Specified value:
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