Coolant Temperature Sensor/Switch (For Computer): Description and Operation

GF07.04-P-6040MCC Coolant Temperature Sensor, Component Description







B11/4 Coolant temperature sensor

Location
The coolant temperature sensor is screwed onto the left side on the cylinder head.

Task
The coolant temperature sensor detects the coolant temperature and transmits a corresponding voltage signal to the ME-SFI [ME] control unit (N3/10).

Function







The NTC resistor integrated within the coolant temperature sensor changes its electrical resistance according to the coolant temperature. The ME-SFI [ME] control unit applies a sensor voltage of 5 V to pin 1 (1) and evaluates signal voltage at pin 2 (2) according to the coolant temperature.