Acura 2009 RL Owner's Manual page 423

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Collision Mitigation Brake System (CMBS)
Radar Sensor
RADAR SENSOR COVER
The radar sensor is located under
the Acura emblem in the front grille.
If the radar sensor cover is covered
with mud, dirt, dead leaves, wet
snow, etc., or if you put a sticker on
it, the CMBS will automatically shut
off, and the CMBS indicator on the
instrument panel will come on. You
will also see a ''CHECK CMBS
RADAR SENSOR'' message on the
multi-information display for about 5
seconds.
420
BOLTS
(Do not tamper)
Always keep the radar sensor cover
clean. If it gets dirty, clean it with
water or a mild detergent. Never use
chemical solvents or polishing
powder.
There are three bolts on the sides of
the radar sensor. Do not tamper with
these bolts, or you may cause the
system to malfunction.
2009 RL
Do not allow anything to impact the
radar sensor or the radar sensor
cover. If either of these parts
receives a strong impact, turn off the
system by pressing the CMBS off
switch, and have your vehicle
checked by a dealer. If the front
grille ever needs to be repaired,
consult a dealer first.
If the radar sensor cover or the radar
sensor ever needs to be removed,
take your vehicle to a dealer.