| Circuit Diagram |

Signal Waveform
Inspection1.Turn the ignition switch OFF and disconnect the battery negative (-) cable.2.Disconnect the fuel pressure regulator valve connector.3.Measure resistance between the fuel pressure regulator valve terminals 1 and 2.
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.
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