volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Engine Code AAZ|Page 1948 > < Engine Controls - Silicone Sealer/Lubricant Precautions|Page 1943
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Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
Engine Code AAZ

Special Tools, Testers And Auxiliary Items:

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Fluke 83 multimeter (or equivalent)

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VW1594 connector test kit

Test Sequence:

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Remove harness connector from sensor for engine temperature -G27-.

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Measure resistance between engine temperature sensor terminals -1- and -3- using multimeter.

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Compare reading with specifications (see illustration).

If specification not obtained:
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Release coolant system pressure and replace engine temperature sensor.

Engine Code AAZ|Page 1948 > < Engine Controls - Silicone Sealer/Lubricant Precautions|Page 1943