Hyundai Elantra: Heater / PTC Heater Repair procedures
Operating Logic Test (Manual only)
Inspect the PTC operation by confirmation logic as follows.
| 1. |
Entering
| (1) |
Set the Floor mode and maximum heating position. |
| (2) |
Turn off the blower switch. |
| (3) |
Press the intake (recirculation) button 5 times or more. |
| (4) |
\Indicators of intake and A/C button are continuously flashed with an interval of 0.5 seconds. |
| (5) |
Confirm the PTC operation by turn on the blower switch. |
| (6) |
Each PTC relay is operated with an interval of 3 seconds. |
| (7) |
The logic test will be automatically cancelled after 30 seconds.
In addition, it can be cancelled by followings.
| A. |
Select A/C or intake (recirculation) switch |
|
|
| 2. |
Cancellation
| A. |
Select A/C or intake (recirculation) switch. |
| B. |
Turn the ignition switch OFF. |
| C. |
The test is cancelled automatically after 30 seconds. |
|
| 3. |
If the PTC is not operated, substitute with a known-good PTC heater and check for proper operation.
If the problem is corrected, replace the PTC heater. |
Operating Test
This test should be performed in the PTC ON conditions.
| 2. |
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
|
|
| 3. |
If the current is not specification, inspect 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.
|
| 4. |
If the measured resistance is not specification, replace the PTC heater with new one. |
| 1. |
Disconnect the negative (-) battery terminal. |
| 2. |
Remove the floor console side cover.
(Refer to Body - "Floor Console Assembly") |
| 3. |
Disconnect the PTC heater connector (A). 
|
| 4. |
Remove the PTC heater core (A) after loosening the PTC heater mounting screws. 
|
| 5. |
To intall, reverse the removal procedure. |
Description
The PTC (Positive Temperature Coefficient) heater is installed at the exit or the backside of heater core.
The PTC heater is an electric heater using a PTC element as
an auxiliary he ...
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the heater and blower assembly.
(Refer to Heater - "Heater Unit")
3.
Remove the heater unit lower case (A) after l ...
PTC Heater Description and Operation
Evaporator Core Repair procedures