Schematic diagram - coolant hoses, Golf and Golf Estate

Note The schematic diagram for the entire coolant circuit can be found in the repair group 19 → Rep. gr.19. Topping up coolant and bleeding coolant circuit → Rep. gr.19 and → Chapter

Note

The -arrows- indicate the direction of coolant flow.

1 -	Heat exchanger for heater in heater and air conditioning unit

Incorporation in coolant circuit → Rep. gr.19.

2 -	Auxiliary heater

Removing and installing → Chapter.

3 -	Circulation pump -V55-

The circulation pump -V55- is integrated in the hose assembly of the auxiliary heater.

Removing and installing → Chapter

Note For this vehicle (only selected engine types), a Start/Stop system is offered as an optional equipment. On vehicles equipped with a Start/Stop system, the circulation pump -V55- of the auxiliary heater can be actuated by the auxiliary heater control unit -J364- while the stop function is active. To achieve this, the auxiliary heater control unit -J364- receives a command from the air conditioning system operating unit, the Climatronic control unit -J255- and the air conditioning system control unit -J301- via the data bus to switch on the circulation pump -V55-; vehicle diagnostic tester in “Guided fault finding” mode.

4 -	Coolant supply from engine

Incorporation of auxiliary/supplementary heater in engine coolant circuit → Rep. gr.19.

5 -	Coolant return to the engine

Incorporation of auxiliary/supplementary heater in engine coolant circuit → Rep. gr.19.