3.
Measure resistance between terminal 1, 2, 3 of PTC heater and ground line.
Resistance : 0.3 ~ 1.5Ω
A.
PTC 1
B.
PTC 2
C.
PTC 3
Inspect the PTC operation by confirmation logic as below.
Entering
Set the Vent, Bi-Level, or Floor mode and maximum heating position.
Turn off the blower switch.
Press the intake (recirculation) button 5 times or more.
Indicators of entire button are continuously flashed with an interval of 0.5 seconds (MANUAL).
Graphics of the entire LCD display continuously switch on and off with an interval of 0.5 seconds (DATC).
Confirm the PTC operation by turn on the blower switch
Each PTC relay is operated with an interval of 3 seconds.
The logic test will be automatically cancelled after 30 seconds.
In addition, it can be cancelled by followings;
Operating any switch except the blower, temperature and off switch
Ignition switch OFF
Cancellation
Operate any switch except the blower, temperature control, mode off switch.
Turn the ignition switch OFF.
The test is cancelled automatically after 30 seconds.
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.
This test should be performed in the PTC ON conditions.
Run the engine.
Check the current on 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 |
If the current is not specification, inspect related wiring.
Turn the ignition switch OFF.
Disconnect the PTC heater connector.
Measure resistance between terminal 1, 2, 3 of PTC heater and ground line.
Resistance : 0.3 ~ 1.5Ω
PTC 1
PTC 2
PTC 3
If the measured resistance is not specification, replace the PTC heater with new one.
Disconnect the negative (-) battery terminal.
Remove the driver side crash pad side cover (A).
Remove the driver side crash pad garnish (A) after loosening the mounting screws.
Remove the driver side crash pad lower panel (A) after loosening the mounting screws and then disconnect the connectors (B).
Remove the driver side crash pad under cover (A) and then disconnect the connector (B).
Remove the driver side shower duct (A) after loosening the screw.
Disconnect the PTC heater connector (A).
Loosen the PTC heater mounting screw and then remove the PTC heater core (A).
Install in the reverse order of removal.
