Safety precautions when working with the Thermo Top V additional heater (VW Tiguan 1)

It is prohibited to turn on the additional heater in places where there is a risk of fire or explosion. It is prohibited to turn on the additional heater in closed rooms that are not equipped with exhaust ventilation (even if the launch occurs on a timer). When working with the fuel system, it is necessary to observe safety regulations and cleanliness rules. After removing or depressurizing fuel system components (for example, a metering pump, fuel lines, a fuel level sensor) it is prohibited to start the engine. Before repairing the additional heater, it is necessary to: relieve pressure in the cooling system by opening the expansion tank cap. Upon completion of repairs to the additional heater or fuel system, check the operation of the additional heater. Upon completion of repair work on the additional heater, it is necessary to conduct its self-diagnosis using the tester -VAS 5051B-.

Conditions for starting in auxiliary heater mode

• The engine type corresponds to the heater type (diesel/petrol)
• Ignition on (terminal 15)
• Engine speed 300 rpm. Coolant temperature 69°C.
• ECON button not pressed, temperature control not set to "cold" position
• Outside air temperature 5°C
• There is sufficient fuel in the tank (the engine is not powered in reserve fuel mode)
• No intervention from the on-board network control unit
• There is no shutdown on impact signal
• There are no errors in the fault memory that prevent the engine from starting

[The text is copied from this portal: VWmanual.ru]

Conditions for starting in autonomous heater mode

Instructions: Each heater can also operate as an additional heater (with the engine running).

• The engine type corresponds to the heater type (diesel/petrol)
• The independent heater is coded in the diagnostic interface of the data bus
• No voltage drop shutdown
• There is sufficient fuel in the tank (the engine is not powered in reserve fuel mode)
• There is no shutdown on impact signal
• There are no errors in the fault memory that prevent the engine from starting