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Other Audi Workshop Service and Repair Manuals
Other Makes
Running gear
Body
Power unit
Power transmission
Vehicle electrics
Heating, ventilation, air conditioning system
Heating and air conditioning
Air conditioner with refrigerant R134a
Auxiliary heating
Aux. heater/heater booster
Servicing auxiliary heater
Safety precautions when working on vehicles fitted with auxiliary heater
Notes on general repair work on vehicles fitted with auxiliary heater
Rules for cleanliness when working on auxiliary heater (and fuel system)
Layout of components for auxiliary heater in vehicle
Fuel extraction for auxiliary heater
Checking and adjusting CO2 content in exhaust gas of auxiliary heater
Checking and adjusting CO2 content in exhaust gas of auxiliary heater
Checking CO2 content in exhaust gas of auxiliary heater
Adjusting CO2 content in exhaust gas of auxiliary heater
Checking components of auxiliary heater
List of electrical checks
Test step 1 ( glow plug with flame monitor Q8 )
Test step 2 ( overheating fuse S24 / overheating sensor G189 and temperature sensor G18 )
Characteristic resistance curve of overheating fuse S24 / overheating sensor G189
Characteristic resistance curve of temperature sensor G18
Test step 3 ( fuel pre-heating heater element Z66 and fuel shut-off valve N109 )
Functional description of auxiliary heater
Incorporation of auxiliary heater into coolant circuit
Removing and installing auxiliary heater
Dismantling and assembling auxiliary heater
Block diagram of auxiliary heater
Activation of auxiliary heater with remote control