Kia Sedona (2008 year). Instruction — part 224
POWER SUPPLY CIRCUIT INSPECTION
1. Check for open in power harness.
1. Ignition "ON"
2. Disconnect Humidity Sensor.
3. Measure voltage value between terminal "5" of Humidity Sensor and chassis ground.
Specification: 5V
Fig. 20: Checking Voltage Between Terminal "5" Of Humidity Sensor And Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC.
4. Is the measured voltage within specifications?
YES
Go to "COMPONENT INSPECTION" procedure.
NO
Check for open in power harness. Repair as necessary and go to "VERIFICATION OF
VEHICLE REPAIR" procedure.
COMPONENT INSPECTION
Refer to DTC B1200.
VERIFICATION OF VEHICLE REPAIR
Refer to DTC B1200.
DTC B1204 AIR MIX POTENTIOMETER OPEN (LOW) - PASSENGER'S
COMPONENT LOCATION
2008 Kia Sedona EX
2008 HVAC Blower & A/C Controls (Automatic) - Sedona
Microsoft
Monday, May 24, 2010 3:56:07 PM
Page 18
© 2006 Mitchell Repair Information Company, LLC.
Fig. 21: Identifying Temperature Control Actuator Component Location
Courtesy of KIA MOTORS AMERICA, INC.
GENERAL DESCRIPTION
Temperature control actuator located at heater unit, regulates the temperature by the procedure as follows.
Signal from control unit adjusts position of temp, door by operating temp, motor and then temperature will be
regulated by the hot/cold air ratio decided by position of temp. door.
DTC DESCRIPTION
The A/C controller sets DTC B1204 if there is an open circuit or poor connection in the air mix potentiometer.
DTC DETECTING CONDITION
DTC DETECTING CONDITION CHART
SPECIFICATION
Item
Detecting Condition
Possible cause
DTC Strategy
Voltage check
Poor connection of
connected part
Open circuit in harness
Short circuit in harness
Faulty driver Air Mix
potentiometer
Threshold value
< 0.1V
Detecting time
0.3 sec
FAIL SAFE
If temperature setting 17-
24.5°C (63-76°F) fix at
max. cooling position.
If temperature setting 25-
32°C (77-90°F) fix at max.
heating position.
2008 Kia Sedona EX
2008 HVAC Blower & A/C Controls (Automatic) - Sedona
Microsoft
Monday, May 24, 2010 3:56:07 PM
Page 19
© 2006 Mitchell Repair Information Company, LLC.
Fig. 22: Air Mix Graph
Courtesy of KIA MOTORS AMERICA, INC.
MONITOR SCAN TOOL DATA
1. Connect scan tool to Data Link Connector (DLC).
2. Engine "ON"
3. Monitor the "Passenger's Air Mix Potentiometer" Parameter on the scan tool while operating temp,
switch.
Fig. 23: Diagnosis Function Screen Display - Air Mix Potentiometer (PA)
Courtesy of KIA MOTORS AMERICA, INC.
4. Are the DTC B1204 present and is parameter of "Passenger's Air Mix Potentiometer" fixed?
Parameter of "Passenger's Air Mix Potentiometer" will be fixed at 100% (or any value above 90%), or 0%
(or any value below 10%), if there is any fault in Passenger's Air Mix potentiometer.
YES
2008 Kia Sedona EX
2008 HVAC Blower & A/C Controls (Automatic) - Sedona
Microsoft
Monday, May 24, 2010 3:56:07 PM
Page 20
© 2006 Mitchell Repair Information Company, LLC.
Go to TERMINAL AND CONNECTOR INSPECTION procedure.
NO
Fault is intermittent caused by poor contact in the sensor's and/or A/C controller's connector or was
repaired and A/C controller memory was not cleared. Thoroughly check connectors for looseness, poor
connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary
and then go to "VERIFICATION OF VEHICLE REPAIR" procedure.
TERMINAL AND CONNECTOR INSPECTION
1. Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical
damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination,
deterioration, or damage.
3. Has a problem been found?
YES
Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR" procedure.
NO
Go to "SIGNAL CIRCUIT INSPECTION" procedure.
SIGNAL CIRCUIT INSPECTION
1. Check for open in harness.
1. Ignition "OFF"
2. Disconnect Passenger's Air Mix potentiometer.
3. Measure resistance between terminal "6" of Passenger's Air Mix Potentiometer and terminal "14"
of A/C control unit.
Specification: Approx. 0 ohms
2008 Kia Sedona EX
2008 HVAC Blower & A/C Controls (Automatic) - Sedona
Microsoft
Monday, May 24, 2010 3:56:07 PM
Page 21
© 2006 Mitchell Repair Information Company, LLC.
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