audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Coolant Temperature Signal, Checking|Page 687 > < Understanding Track Style Wiring Diagrams, Important Stuff !|Page 684
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Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
Coolant Temperature Signal, Checking

Coolant temperature sensor, checking

Test conditions

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coolant temperature min. 20°C (68°F) 

Work sequence

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Remove connector from coolant temperature sensor (arrow)

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Connect ohmmeter between coolant temperature sensor and ground cable
^

Specification: 60 ohm - 1 K ohm 

If specification NOT OK

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Replace coolant temperature sensor

If specification OK

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Check sensor wiring

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Remove control unit cover located in passenger side footwell and unplug control unit connector

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Connect ohmmeter between contact 10 on control unit connector A and disconnected wire from coolant temperature sensor
^

Specification: approx. 0 ohm

If specification OK

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Check for open circuit in wiring

If circuit OK

-

Replace control unit

Coolant Temperature Signal, Checking|Page 687 > < Understanding Track Style Wiring Diagrams, Important Stuff !|Page 684