Kia Carens: Heater / PTC Heater (Diesel only) Repair procedures

Kia Carens RP (2013-2018) Service Manual / Heating,Ventilation And Air Conditioning / Heater / PTC Heater (Diesel only) Repair procedures

Inspection
Operating Logic Test (Manual only)
Inspect the PTC operation with the confirmation logic below :
1.
Entering
(1)
Set the mode to FLOOR.
(2)
Set the temperature to MAX HOT.
(3)
Turn off the blower switch.
(4)
Press the intake (recirculation) button 5 times or more.
2.
Forced operation
(1)
Non-A/C : The intake button indicator will blink with an interval of 0.5 second for 30 seconds.
With A/C : The intake and A/C button indicator will blink with an interval of 0.5 second for 30 seconds.
(2)
The PTC2 and PTC3 will operate by turning on the blower switch.
PTC2 and PTC3 will operate with an interval of 3 seconds.
PTC2 and PTC3 will trun off simultaneously when the blower switch is turned off.
Only PTC2 and PTC3 will be forced operated.
3.
Cancellation
(1)
Select A/C or intake (recirculation) switch.
(2)
The test cancels automatically after 30 seconds.
(3)
Turn the ignition switch off.
Operating Logic Test (DATC only)
The operating logic test can be confirmed with GDS.
Operating Test
This test should be performed in the PTC ON conditions.
1.
Run the engine.
2.
Check the current on the wiring with a clamp multi tester.
Pattern
Current (A)
PTC 1 ON
0.1 ~ 33
PTC 2 ON
0.1 ~ 33
PTC 3 ON
0.1 ~ 33
Total
0.1 ~ 100

3.
If the current is not within specification, inspect the related wiring.
Resistance Test
1.
Turn the ignition switch OFF.
2.
Disconnect the PTC heater connector.
3.
Measure the resistance between terminal 1, 2, 3 of PTC heater and ground line.
Resistance : 0.3 ~ 1.5Ω

1)
PTC 1
2)
PTC 2
3)
PTC 3
4.
If the measured resistance is not within specification, replace the PTC heater with a new one.
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the crash pad lower panel.
(Refer to Body - "Crash Pad Lower Panel")
3.
Remove the driver's side shower duct (A) after loosening the screw.

4.
Disconnect the PTC heater connector (A).

5.
Loosen the PTC heater core mounting screws (A).

6.
To remove the PTC heater core (A), slightly bend the driver's side shower duct bracket (B) by pulling it inward.

7.
Remove the PTC heater core (A).

8.
Install in the reverse order of removal.
PTC Heater (Diesel only) Description and operation
Description The PTC (Positive Temperature Coefficient) heater is installed at the exit or the backside of the heater core. The PTC heater is an electric heater using a PTC elem ...

Temperature Control Actuator Description and operation
Description The heater unit includes mode control actuator and temperature control actuator. The temperature control actuator is located at the heater unit. It regulates the t ...

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