Kia Sedona (2008 year). Instruction — part 235

MONITOR SCAN TOOL DATA

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

2. Engine "ON"

3. Monitor the "AMBIENT TEMP. SENSOR" Parameter on the scan tool.

Parameter of "AMBIENT TEMP. SENSOR" will be fixed at 20°C, if there is any fault in AMBIENT
TEMP. SENSOR.

Fig. 69: Diagnosis Function Screen Display - Ambient Temp. Sensor
Courtesy of KIA MOTORS AMERICA, INC.

4. Are the DTC B1237 present and is parameter of "AMBIENT TEMP. SENSOR" fixed?

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.

-30 (-22)

527.99

25 (77)

30

-15 (5)

218.21

35 (95)

19.6

0 (32)

97.83

50 (122)

10.82

15 (59)

47.12

60 (140)

7.48

2008 Kia Sedona EX

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

Microsoft

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

Page 62

© 2006 Mitchell Repair Information Company, LLC.

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 short to ground in harness.

1. Ignition "OFF"

2. Disconnect ambient temp, sensor.

3. Measure resistance between terminal "1" of ambient temp, sensor and chassis ground.

Specification: Approx. infinity ohms

Fig. 70: Checking Resistance Between Terminal "1" Of Ambient Temp, Sensor And Chassis
Ground
Courtesy of KIA MOTORS AMERICA, INC.

4. Is the measured resistance within specifications?

2008 Kia Sedona EX

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

Microsoft

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

Page 63

© 2006 Mitchell Repair Information Company, LLC.

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 Ambient temp, sensor.

1. Ignition "OFF"

2. Disconnect ambient temp, sensor.

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

Specification: Refer the specifications in Fig. 72.

Fig. 71: Checking Resistance Between Terminal "1" And "2" Of Ambient Temp, Sensor
Courtesy of KIA MOTORS AMERICA, INC.

2008 Kia Sedona EX

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

Microsoft

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

Page 64

© 2006 Mitchell Repair Information Company, LLC.

Fig. 72: Resistance And Temperature Graph
Courtesy of KIA MOTORS AMERICA, INC.

4. Is the measured resistance within specifications in Fig. 72? (tolerance limits ±3%)

YES

Go to step 2.

NO

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

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

2. Check A/C Control Unit

1. Engine "ON"

2. Disconnect ambient temp, sensor.

3. Measure voltage between terminal "4" 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

Page 65

© 2006 Mitchell Repair Information Company, LLC.