Kia Sedona (2008 year). Manual - 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

Page 50 

© 2006 Mitchell Repair Information Company, LLC. 

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 

 

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

Page 51 

© 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.