Kia Cee'd: Heater / PTC Heater (Diesel Engine) Description and operation

The 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 diesel engine. The electric heater heats up the interior by directly heating the air that passes through the heater. The name itself implies that the element has a proportional resistance change sensitive to temperature.

Operation Principle

ECM outputs a PTC ON signal and operates PTC relay 1. Then heater controller operates PTC relay 2 and PTC relay 3 with an interval of 15 seconds.

However, PTC relay 3 can be operated while battery voltage is above 12.4V.

Operating Condition

PTC heater operates according to the following conditions :

 

Mode Control Actuator Repair procedures

Inspection 1. Turn the ignition switch OFF. 2. Disconnect the mode control actuator connector. 3. Verify ...

PTC Heater (Diesel Engine) Repair procedures

Inspection Operating Logic Test (Manual only) Inspect the PTC operation with the confirmation logic below : 1. Entering (1) ...

Other information:

Kia Cee'd JD Owners Manual: Lane departure warning system (LDWS)
This system detects the lane with the sensor at the front windshield and warns you when your vehicle leaves the lane. WARNING The LDWS does not make the vehicle change lanes. It is the driver's responsibility to always check the road conditions. Do not turn the steering whe ...

Ford Escape 2020-2026 Owners Manual: Manually Opening the Fuel Filler Door - Hybrid Electric Vehicle (HEV)/Plug-In Hybrid Electric Vehicle (PHEV)
WARNING: The fuel system may be under pressure. If you hear a hissing sound near the fuel filler inlet, do not refuel until the sound stops. Otherwise, fuel may spray out, which could cause serious personal injury. Note:The transmission must be in park (P) or neutral (N). When using the manual ...