Q: We have a
2015 Hyundai Sonata Limited. It wasnít long after we purchased it,
it developed the following problem: When I wanted to go into smart
cruise control, it would refuse and indicate that SCC (smart cruise
control) conditions are not met. The difficult part of this is that
this would happen intermittently. The dealership checked it out
numerous times over the past two to three years to no avail. Then
they brought in a top engineer to check it out. They said he made
full alignment of the system, and the problem still happens. They
cannot replicate the problem. It seems this is the only Hyundai with
this problem. The problem arises no matter what the weather, and,
yes, the car is clean. It is in the garage most of the time. It has
over 23,000 miles. Any ideas?
A: Your smart
cruise control system employs a radar sensor and smart integration
between the powertrain, braking and other control modules to adapt
to traffic ahead and maintain a safe following distance relative to
the speed youíve requested.
The list of
possible disabling conditions is lengthy, with a dirty, misaligned,
or faulty radar unit included.
question for you: When the SCC system is unavailable, are you able
to engage the basic cruise control instead (press and hold the
"distance" button for two seconds)? If so, this would rule
out about 90 percent of the items on the list.
As with all
intermittent problems, carefully detailing the conditions present at
the time of symptom is essential. Having a passenger record a phone
video of an unsuccessful smart cruise control engagement attempt,
narrated with appropriate comments would solidify your concern (car
companies prefer this word over complaint) and help you pressure
Hyundaiís customer service folks to get that engineer back on it,
and perhaps replace the integrated radar/SCC control unit. Seeking a
repair attempt as soon as possible after a failure provides the best
chance of holding any stored diagnostic trouble codes in memory.
I searched for
applicable service bulletins and cast a wide net for similar
concerns but came up empty. This appears to be a unique problem.
Turn up the heat with that video!
Q: My red
battery indicator has begun to light up at certain times. What could
on the vehicle, there could be several possible causes for this;
usually itís because the alternator is not supplying sufficient
energy for vehicle use and battery state of charge. Alternator is a
term used for a vehicleís belt-driven electrical generating
device; it converts the engineís mechanical energy into electrical
engine off and cool, try grabbing and rotating the alternatorís
pulley against the stationary drive belt. If you can slip the pulley
at all, belt tension is inadequate. Also check the battery terminals
for looseness and/or corrosion. Alternators typically employ
brushes, which are small carbon electrical conductors that ride
against the rotorís slip rings. The rotor becomes a multiple-pole
magnet, the heart of the generating process. Due to friction,
brushes eventually wear out, lasting perhaps 125,000 to 150,000
miles. This may be whatís causing your intermittent charging
system light. Brushes are inexpensive but due to the labor involved
to renew them in most cases itís simpler to swap out the
alternator with a remanufactured unit.