Today we
will describe a failure that affects the X6 35 xdrive aut. E71 (30 6D
5) model of the BMW brand, specifically a failure related to the
engine.
AFFECTED VEHICLE
BMW X6 35 xdrive aut. E71 (30 6D 5)
SYMPTOM
The engine
does not start.
FAILURES REPORTED
507D – Parking lock deactivated erroneously.
CF37 – CAS messages in the wrong K bus.
CAUSE
If the
engine fails to start, due to a voltage drop caused by an excessive
requirement when starting the engine, either because of a low battery or
because of keeping the ignition switched on over an extended period of
time, this may be due to a lack of communication between the CAS (Car
Access System) unit and the DDE (Digital Diesel Electronics) engine
control unit.
NOTE: It
should be noted that in this model, in case of a real problem with the CAS (Car
Access System), the starter motor is not launched.
REMEDY
Pairing of the CAS and DDE units with an appropriate diagnostic tool.
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ReplyDeleteRegular BMW maintenance is crucial to prevent engine start-up failures, particularly in models such as the X6 35 xdrive aut. If the engine fails to start due to a voltage drop caused by a low battery or extended periods of ignition, it may be due to a lack of communication between the CAS and DDE units. To avoid such failures, it's essential to keep up with routine BMW Maintenance, including regular battery checks and maintenance of the Car Access System and Digital Diesel Electronics engine. By keeping your BMW maintained, you can avoid these engine start-up failures and maintain the optimal performance of your car.
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