Kia Sedona (2008 year). Instruction — part 232

1. Check for short in harness.

1. Ignition "OFF"

2. Disconnect Intake potentiometer.

3. Measure resistance between terminal "5" and "6" of Intake potentiometer.

Specification: Approx. infinity ohms

Fig. 56: Checking Voltage Between Terminal "5" And "6" Of Intake Potentiometer
Courtesy of KIA MOTORS AMERICA, INC.

4. Is the measured resistance within specifications?

YES

Go to "GROUND CIRCUIT INSPECTION" procedure.

NO

Check for short to power harness in signal harness. Repair as necessary and go to
"VERIFICATION OF VEHICLE REPAIR" procedure.

GROUND CIRCUIT INSPECTION

1. Check for open in harness.

1. Ignition "OFF"

2. Disconnect Intake Potentiometer.

3. Measure resistance between terminal "5" of Intake Potentiometer and chassis ground.

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

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Fig. 57: Checking Resistance Between Terminal "5" Of Intake Potentiometer And Chassis
Ground
Courtesy of KIA MOTORS AMERICA, INC.

4. Is the measured resistance within specifications?

YES

Go to "COMPONENT INSPECTION" procedure.

NO

Check for open in ground harness. Repair as necessary and go to "VERIFICATION OF
VEHICLE REPAIR" procedure.

COMPONENT INSPECTION

Refer to DTC B1208.

VERIFICATION OF VEHICLE REPAIR

Refer to DTC B1208.

DTC B1233 IN-CAR TEMPERATURE SENSOR SHORT (LOW)

COMPONENT LOCATION

2008 Kia Sedona EX

2008 HVAC Blower & A/C Controls (Automatic) - Sedona

Microsoft

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© 2006 Mitchell Repair Information Company, LLC.

Fig. 58: Identifying In-Car Temperature Sensor Component Location
Courtesy of KIA MOTORS AMERICA, INC.

GENERAL DESCRIPTION

The in-car temperature sensor located at crush pad, control unit contains a thermistor which measures the
temperature of the inside. The signal, decided by the resistance value which changes in accordance with
perceived inside temperature, is delivered to heater control unit and according to this signal, the control unit
regulates in-car temperature to intended value.

DTC DESCRIPTION

The A/C controller sets DTC B1233 if there is a short circuit in in-car temp, sensor signal harness or the
measured resistance value of sensor is less than threshold value (about 7.46kohms)

DTC DETECTING CONDITION

DTC DETECTING CONDITION CHART

SPECIFICATION

TEMPERATURE SPECIFICATION

Item

Detecting Condition

Possible cause

DTC Strategy



Resistance check



Short circuit in harness



Faulty in-car temp. Sensor



Faulty A/C control unit

Threshold value



< 7.46 kohms

Detecting time



0.3 sec

FAIL SAFE



Control with the value of 25°C (77°F)

Temperature [°C (°F)]

Resistance (kohms)

Temperature [°C (°F)]

Resistance (kohms)

-30 (-22)

509.57

25 (77)

30

-15 (5)

216.07

35 (95)

15.59

0 (32)

97.71

50 (122)

10.81

2008 Kia Sedona EX

2008 HVAC Blower & A/C Controls (Automatic) - Sedona

Microsoft

Monday, May 24, 2010 3:56:07 PM

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© 2006 Mitchell Repair Information Company, LLC.

MONITOR SCAN TOOL DATA

1. Connect scan tool to data link connector (DLC).

2. Engine "ON"

3. Monitor the "IN-CAR TEMP. SENSOR" Parameter on the scan tool.

Fig. 59: Diagnosis Function Screen Display - In-Car Temp Sensor
Courtesy of KIA MOTORS AMERICA, INC.

4. Are the DTC B1233 present and is parameter of "IN-CAR TEMP. SENSOR" fixed?

Parameter of "IN-CAR TEMP. SENSOR" will be fixed at 25°C (77°F), if there is any fault in IN-CAR
TEMP. SENSOR.

YES

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.

15 (59)

47.13

60 (140)

7.46

2008 Kia Sedona EX

2008 HVAC Blower & A/C Controls (Automatic) - Sedona

Microsoft

Monday, May 24, 2010 3:56:07 PM

Page 53

© 2006 Mitchell Repair Information Company, LLC.