| Components (1) |

| 1. Rear bumper side bracket [LH] 2. Rear bumper side bracket [RH] | 3. Rear bumper cover |
| Components (2) |

| 1. Rear bumper side under cover [LH] 2. Rear bumper side under cover [RH] | 3. Rear bumper center under cover |
Component Location 1. Rear bumper cover
Inspection1.Check that the voltage values of No. 1, 2 duct sensors change1. Sensor (+ 5V)2. Sensor groundSpecification Ambient temperature [°C (°F)] Resistance (kΩ) Voltage (V) 50 (122)1.
DescriptionThe 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 element as an auxiliary heating device that supplements deficiency of interior heat source in highly effective hybrid engine.