audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Thermostat, Engine Cooling > < Without Auto-Check System
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Temperature Warning Lamp/Indicator: Testing and Inspection
With Auto-Check System

Engine coolant overheat warning light, checking 
(vehicles with Auto-Check system)

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remove connector from coolant temperature sensor

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connect jumper wire from contact C to ground

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start engine and let idle
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warning light must blink

If light does not blink,
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check light bulb

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check wiring according to current flow diagram

If OK,
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replace engine coolant overheat/brake warning light module in instrument cluster

Thermostat, Engine Cooling > < Without Auto-Check System