Repairing auxiliary heater Thermo Top Z — VW

VW
Amarok
2011
Heating, ventilation, air conditioning system
Auxiliary heater
Edition
08.2012
Repairing auxiliary heater Thermo Top Z
Before beginning repair work, perform the following steps: (repair group 27).
Special tools and workshop equipment required
Torque wrench
V.A.G 1410 (4…20 Nm)
Hose clamps up to 25 mm Ø
3094
Note
There is a manufacturer's nameplate on the auxiliary heater unit. This type plate provides information about which version is installed in the vehicle: diesel Thermo Top Z
Fig.
The coolant circuit must be bled after it is opened.
Remote control receiver for auxiliary coolant heater
R149 (see the separate procedure) “Removing remote control receiver for auxiliary coolant heater
R149”
Dash panel insert (K)
Aerial
R11 for remote control receiver for auxiliary coolant heater
R149
Roof display unit
J702 (see the separate procedure) “Removing roof display unit
J702”
Fuel gauge sender (G) (repair group 20: Metering pump)
V54
Fuel supply to auxiliary heater (see the separate procedure).
It is possible that the metering pump ticks audibly but still does not deliver fuel because there is air in the intake pipe. The control unit will then switch itself off permanently. You should therefore read out the event memory using vehicle diagnosis, testing and information system
VAS 5051B or later models (self-diagnosis of the Thermo Top Z auxiliary heater). Delete the event memory and carry out a final control diagnosis of the Thermo Top Z auxiliary heater. (see the separate procedure) “Removing and installing metering pump
V54” (see “Testing quantity of fuel delivered”)
Auxiliary heater Thermo Top Z
With auxiliary heating control unit
J364.
Located in engine compartment, front left (see “Removing and installing auxiliary heater Thermo Top Z”)
2-way valve for coolant shut-off valve
N147
Ambient temperature sensor
G17
Checking:
Vehicle diagnosis, testing and information system
VAS 5051B or later model.
Fig.
“Removing and installing ambient temperature sensor
G17”
Manufacturer's plate on heater unit for Thermo Top Z, diesel
Note
The most important technical data are shown on upper part of manufacturer's plate.
The date of first use is entered on the lower part of manufacturer's plate.
The year the unit was first put into use must be entered on the
“Genuine part” manufacturer's plate. The heat exchanger of the coolant heater does not need to be renewed after 10 years. Legislation in Germany dictates only that air heaters must be renewed.
Removing and installing ambient temperature sensor
G17 (repair group 63).
Unclip ambient temperature sensor
G17 (1) and separate connector.