Temperature Sensors

All temperature sensors used in the E60 IHKA system are NTC type. The E60 IHKA system uses the following temperature sensor inputs:

• Interior Temperature Sensor - Located in the IHKA control panel faceplate. The IHKA panel also incorporates a sensor fan which is removable and can be replaced as a separate part. The temperature sensor itself is not replaceable separately.
• Ambient (outside) Temperature - The ambient temperature sensor is an NTC sensor which is an input to the instrument cluster. The temperature signal is then sent to the IHKA control module via K-CAN.
• Two Heater Core Temperature Sensors - The Heater core temperature sensors can be accessed by removing the CID. The temperature sensors are used to monitor the temperature of the left and right side of the heat exchanger.
• Evaporator Temperature Sensor - As on previous models, the evaporator temp sensor is used to prevent evaporator freeze-up.
• Face Vent Temperature Sensor - There is one face vent temperature sensor located behind the center face vent. It can be accessed by removing the center face vent, IHKA panel and M-ASK.