5 Series E60 520d (N47) SAL
condition of the interior filters. These should be replaced as necessary.
•
If automatic air recirculation (AUC) is active, this complaint may also occur, either
permanently or intermittently. In such cases, automatic air recirculation should be
deactivated.
5. No or insufficient blower output or unsteady blower speed
•
If the battery charge state in the vehicle is too low, the electrical system management
will intervene. Current consumption is reduced to ensure that primary vehicle functions
such as engine starting ability are guaranteed. This also affects the blower. Blower
output is reduced to 75 %, 50 % or 25 % depending on the battery charge state.
This particularly affects short-distance drivers.
•
Whether the electrical system management has intervened can easily be tested with
the defrost function. As the electrical system management has no effect on the defrost
function, the blower must run at full power when the defrost function is activated.
•
In such cases, the customer should be informed that this is a normal vehicle function
designed to ensure that the vehicle's starting ability is guaranteed. It can only be
countered by occasionally driving longer distances or by recharging the battery.
6. Auxiliary heater (PTC), heated rear window or heated seats inoperable
The cause of this may also be consumer deactivation by the electrical system
management. Before replacing components, the battery charge state should always be
checked and if the complaint persists, perform diagnosis with DISplus/GT1 (see section 5).
Further important notes especially for the workshop and workshop reception
1.
Fault diagnosis tree:
From DIS DVD 50 new fault patterns for complaints about the air-conditioning system
have been integrated in the fault pattern selection on the DISplus/GT1 for 1-, 3-, 5-
and 6-Series models. It is important for these fault patterns to be adhered to and the
associated test modules processed so that the cause of the fault can be identified and
the problem rectified.
2.
Reference vehicles:
Because of model upgrading, the wide range of possible settings and the various
integration levels, it is not advisable to compare the functions on two similar vehicles.
The probability of two vehicles having minor differences is very high, even if they are of
the same model.
3.
Odours:
In the event of complaints about odours, the cause should be precisely differentiated.
Make sure that the odour is not caused by any objects or dirt inside the vehicle interior.
Here, carefully examine the floormats, seats, stowage compartments and luggage
compartment. If air recirculation is activated, air from inside the vehicle will be drawn in
and blown out again. This can have the effect of intensifying odours inside the vehicle
(including those caused by dirt on floormats, upholstery and shoes). It is also important
to check the air intake system in the engine compartment. Here, rotting leaves or even
dead animals could cause odours. If the odour that is the subject of the customer's
complaint disappears shortly after switching on the air-conditioning system (maximum
3 minutes), the cause could be the evaporator, in which case the vehicle should be
sent to the workshop to have the evaporator cleaned. Information about cleaning the
evaporator can be found in the current TIS version.
SI Important information about vehicle climate control E8x E9x E6x
BMW AG - TIS
23.01.2013 15:50
Issue status (12/2007) Valid only until next DVD is issued
Copyright
Page - 3 -
