3.
Loosen the PTC heater mounting screw and then remove the PTC heater core (B).
Inspect the PTC operation by confirmation logic as below.
Entering method.
Set the floor mode, maximum heating
Turn off the mode switch
Press the REC button more than 5 times
Indicator of entire button is flashed with an interval of 0.5 seconds continuously (Manual).
Graphics of the entire LCD display switch on and off with an interval of 0.5 seconds continuously (Automatic)
Confirm the PTC operation by operating the blower switch
Manual : 1~4 step, Automatic: 1~8step.
Each PTC relay is operated with an interval of 3 seconds.
Execute the PTC operation by confirmation logic for 30 seconds.
Cancellation method
Select the A/C button or intake button
IG "OFF".
Cancel the logic after 30 seconds automatically
If the PTC operation is not operated, substitute with a known-good PTC and check for proper operation.If the problem is corrected, replace the PTC.
Disconnect the negative (-) battery terminal.
Disconnect the PTC heater connector (A).
Loosen the PTC heater mounting screw and then remove the PTC heater core (B).
