Heated Seats - RayTek AUTOPRO Manual De Instrucciones

Engine Performance (Cont.)
n Engine coolant in combustion chamber
(leaking/blown head gasket).
n Excessive oil getting past rings or valve guides.
Trouble shoot and repair problem and retest before
replacing catalytic converter.
Catalytic Converter – Plugged
CAUTION: If a vehicle is operated
with a plugged catalytic converter
for any length of time, possible
engine damage may result.
If a catalytic converter is exposed to a rough run-
ning or improperly maintained engine for extended
periods of time, the end result could be a plugged
converter or exhaust system. Symptoms of a
plugged catalytic converter will be lack of power,
engine temperature increasing as vehicle is driven,
and if the converter has been plugged for a while,
the exhaust manifold gaskets will blow out.
To check for a plugged converter, start engine
and test drive until normal operating tempera-
ture of 85-105°C (190-220°F) is reached and
temperature stabilizes. On some vehicles the
catalytic converter temperatures will lower and
become insufficient for testing purposes if the
vehicle is left idling for a prolonged period of time.
For vehicles equipped with electric cooling fans,
ensure fans cycle on and off three times prior to
testing catalytic converter. During test, hold throttle
to keep engine running at 1000 RPM.
Using the IR thermometer, measure the inlet and
outlet temperatures of the converter. Compare inlet
temperature to outlet temperature. When a con-
verter is plugged, the converter outlet temperature
will be cooler than the inlet temperature. In some
cases, the catalyst inside of the converter will
break apart and end up plugging the exhaust in
the muffler. In this case, the inlet and outlet tem-
peratures of the converter will be close as with an
expired converter. If this is the case, the converter
and muffler will need to be removed, inspected
and repaired as necessary.
Before replacing the catalytic converter, determine
cause of failure as to not damage new converter.

Heated Seats

Some vehicles are equipped with heated seats
as an option. Some heated seats have 2-position
LOW/HIGH heating capabilities. Vehicle may also
be equipped with rear heated seats.
On most vehicles, seat temperature will
reach 35°C (98°F) when in LOW position and
approximately 45°C (110°F), when in HIGH
position. Internal temperature sensors will ensure
heated seats will operate at these temperatures as
closely as possible. Seat temperature may vary by
manufacturer. See appropriate service information
for exact operating temperatures for vehicle being
serviced.
Before checking heated seat temperatures, verify
if vehicle is equipped with heated seat cushions,
heated seat backs or both heated seat cushions
and seat backs. If possible, park vehicle out of
sunlight and allow cabin (in-car) temperature to
stabilize.
Using the IR thermometer, measure heated seat
cushion and/or seat back surface with all heated
seats off. Measure other seats to get a general
temperature reading of seat surfaces. Tempera-
ture should be close between all seats. If surface
temperature is noticeably hotter, heated seat may
be stuck on. Next, turn ignition on and set heated
seat switch to LOW position and allow 5 minutes
for seat temperature to stabilize. Measure heated
seat cushion and/or seat back surface again.
Verify that LOW temperature reading is close to
35°C (98°F).
Next, set heated seat switch to HIGH position and
allow 5 minutes for seat temperature to stabilize.
Measure heated seat cushion and/or seat back
surface again. Verify that HIGH temperature read-
ing is close 45°C (110°F). If temperature readings
are hotter or cooler, diagnose heated seat system
using appropriate service information.