Kia Sedona (2008 year). Manual - part 238

Chassis Ground 
Courtesy of KIA MOTORS AMERICA, INC. 

4. Is the measured resistance within specifications? 

YES  

Go to "COMPONENT INSPECTION" procedure. 

NO  

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

COMPONENT INSPECTION 

1. Check evaporator temp, sensor. 

1. Ignition "OFF"  

2. Disconnect evaporator temp, sensor.  

3. Measure resistance between terminal "1" and "2" of evaporator temp, sensor. 

Specification: Refer the specifications in Fig. 82. 

Fig. 81: Checking Resistance Between Terminal "1" And "2" Of Evaporator Temp, Sensor 
Courtesy of KIA MOTORS AMERICA, INC.

 

2008 Kia Sedona EX 

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

  

Microsoft 

 

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Fig. 82: Resistance And Temperature Graph 
Courtesy of KIA MOTORS AMERICA, INC. 

4. Is the measured resistance within specifications in Fig. 82? (tolerance limits ±3%) 

YES  

Go to step 2. 

NO  

Substitute with a known-good evaporator temp, sensor and check for proper operation. 

If the problem is corrected, replace evaporator temp, sensor and then go to "VERIFICATION OF 
VEHICLE REPAIR" procedure. 

2. Check A/C Control Unit 

1. Engine "ON"  

2. Disconnect evaporator temp, sensor.  

3. Measure voltage between terminal "11" of A/C Control Unit and chassis ground. 

Specification: Approx. 5V 

 

2008 Kia Sedona EX 

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

  

Microsoft 

 

Monday, May 24, 2010 3:56:08 PM

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© 2006 Mitchell Repair Information Company, LLC. 

Fig. 83: Checking Voltage Between Terminal "11" Of A/C Control Unit And Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC. 

4. Is the measured voltage within specifications? 

YES  

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. 

NO  

Substitute with a known-good A/C Control Unit and check for proper operation. 

If the problem is corrected, replace A/C Control Unit and then go to "VERIFICATION OF 
VEHICLE REPAIR" procedure. 

VERIFICATION OF VEHICLE REPAIR 

After a repair, it is essential to verify that the fault has been corrected. 

1. Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode and then clear DTC.  

2. Operate the vehicle and monitor the DTC on the scan tool.  

3. Are any DTCs present? 

YES  

Go to the applicable troubleshooting procedure. 

NO  

System is performing to specification at this time. 

DTC B1242 EVAPORATOR TEMPERATURE SENSOR OPEN (HIGH)

 

2008 Kia Sedona EX 

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

  

Microsoft 

 

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COMPONENT LOCATION 

Fig. 84: Identifying Evaporator Temperature Sensor Component Location 
Courtesy of KIA MOTORS AMERICA, INC. 

GENERAL DESCRIPTION 

Refer to DTC B1241. 

DTC DESCRIPTION 

The A/C controller sets DTC B1242 if there is an open circuit in evaporator temp, sensor signal harness or the 
measured resistance value of sensor is more than threshold value (about 13.6kohms) 

DTC DETECTING CONDITION 

DTC DETECTING CONDITION CHART 

SPECIFICATION 

Refer to DTC B1241. 

MONITOR SCAN TOOL DATA 

1. Connect scan tool to Data Link Connector (DLC).  

2. Engine "ON"  

3. Monitor the "EVAPORATIVE SENSOR" Parameter on the scan tool. 

Item

Detecting Condition

Possible cause

DTC Strategy



Resistance check  



Open Circuit in harness  



Faulty Evaporator temp. Sensor 



Faulty A/C control unit  

Threshold value



> 13.6kohms  

Detecting time



0.3 sec  

FAIL SAFE



Control with the value of -2°C (28.4°F) 

 

2008 Kia Sedona EX 

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

  

Microsoft 

 

Monday, May 24, 2010 3:56:08 PM

Page 77 

© 2006 Mitchell Repair Information Company, LLC.