Removing and installing auxiliary heater control unit J364 — AUDI

Removing and installing
auxiliary heater control unit
J364
Note
There are different control units for vehicles with petrol or diesel engine
Chapter
(adaption) and
Parts List
.
In addition to the different part number and the marked type of fuel (e.g. petrol), control units for vehicles with petrol engine are currently identified by way of a green dot
C
on the control unit rating plate.
The self-diagnosis
“Adaption”
function can be used to switch the type of fuel in the
auxiliary heater control unit
J364
Chapter
.
In auxiliary heating mode, the
metering pump
V54
is actuated with full voltage by the
auxiliary heater control unit
J364
up to control unit part number index
“B”
. For control units as of part number index
“C”
(gradual introduction as of Model Year 2005), the voltage for the actuation signal of the
metering pump
V54
will be limited in auxiliary heating mode to 9.2 V with the petrol version and 9.8 V with the diesel version, thus reducing the operating noise of the
metering pump
V54
.
Removal and installation involve detaching the auxiliary heater from the vehicle in the case of horizontally installed auxiliary heaters
Chapter
.
Removal and installation involve removing the auxiliary heater on vehicles with vertically installed auxiliary heaters
Chapter
.
If the
auxiliary heater control unit
J364
is replaced, the function of at least one remote control hand transmitter must be checked on vehicles with
“Remote control”
as optional extra (if function is not OK, all hand transmitters must be adapted to the
auxiliary heater control unit
J364
)
Chapter
(remote control assignment is performed in
auxiliary heating radio controlled receiver
R64
by way of the
auxiliary heater control unit
J364
).
If the
auxiliary heater control unit
J364
is replaced, auxiliary heater self-diagnosis must be performed (interrogate fault memory, check encoding and adaption etc.)
Chapter
.
Release connectors
A
and
C
by pulling on tab
B
or
D
.
Note
Connectors are released by pressing them towards control unit and pulling tab
E
whilst pressing connector.
The Fig. shows the position of the control unit with a vertically installed auxiliary heater (e.g. on a vehicle with 6-cyl. engine).
For layout of components at or in auxiliary heater, refer to
Chapter
Pay attention to correct assignment of the two plug connections:
Plug connector to vehicle electrical system to plug connection
A
.
Use plug connection
B
to plug in connector of
“auxiliary heater”
wiring harness.