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Removing and installing supplementary and auxiliary heater temperature sensor 2 G587 > < Dismantling and assembling auxiliary heater

A4 Mk3

Removing and installing temperature sensorG18
Removing and installing temperature sensor -G18-
Special tools and workshop equipment required
t  Release tool -VAS 1978/18-
Preparation
–  Switch off ignition (and auxiliary heater).
–  Removing auxiliary heater → Chapter
–  Detaching add-on components of auxiliary heater → Chapter
–  Dismantling auxiliary heater → Chapter
Removing
–  Remove the cover for the combustion air blower -V6- → Chapter (dismantling and assembling auxiliary heater → Item).
   
–  Press the black wires out of the 14-pin connector housing to the supplementary heater control unit -J364- (contacts 10 and 11).
–  Screw out the bolt -1- and detach the retaining clip.
–  Pull out the temperature sensor -G18--2-.
Installing
Install in reverse order; paying attention to the following:
  Note
  N82-10153
There are different versions of the retaining clip for the temperature sensor -G18- and the temperature sensor 2 for supplementary and auxiliary heating -G587-. A -J364- with part number 8xx xxx  xxx is only to be fitted with retaining clips -B- with no spacer ring. A -J364- with part number 4xx xxx  xxx is only to be fitted with retaining clips -A- with a spacer ring -C-. Attention is therefore to be paid to correct assignment (matching part numbers of retaining clip and auxiliary heater control unit -J364-) → Electronic parts catalogue.
  Caution
In the event of an incorrectly fitted retaining clip or use of the wrong version, coolant will escape when the pressure increases in the coolant circuit.
t  If a retaining clip has not been properly fitted, -G18- or -G587- may work loose.
t  Pay attention to correct assignment and proper fitting of the retaining clip.
–  Clean the connection area and the temperature sensor -G18- and check for damage.
–  Replace the O-ring.
–  Moisten the O-ring with a small quantity of coolant.
Tightening torques → Chapter
  A82-10197

Removing and installing supplementary and auxiliary heater temperature sensor 2 G587 > < Dismantling and assembling auxiliary heater