Vehicle: 2016 BMW M5 (F10), V8-4.4L, Turbo
(S63T), Automatic Transmission
Problem: Left headlight inoperative but scan
tool shows a Front right outer fan “message”. No DTCs.
Details: The vehicle came into the shop
because the left headlight was not working. The MIL was not on.
When the tech tried to pull diagnostic trouble codes from the
headlight control module, there were none but he did retrieve a
issue description – “Front right outer fan”.
This model BMW is equipped with a cooling fan designed to cool
down headlamp igniter module and headlamp control module. If
cooling fan does not work, the control module turns-off the
headlamp to prevent damage to other components
Confirmed Repair: The tech removed the bumper
and opened headlamp assembly to have a clear view of the
headlamp cooling fan. He tried to activate it with scan tool
but it was not working. Next, the tech swapped the left and
right fans and tried to activate it with the scan tool. The fan
operated normally. He replaced right headlamp cooling fan and
problem was repaired.