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Coolant temperature sensor, component description - GF07.04-P-6040MCC

ENGINE 132.9 in MODEL 451.3/4 

Fig 1: Locating Coolant Temperature Sensor
G07276896Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

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.

Fig 2: Identifying Coolant Temperature Sensor Connector Function
G07077259Courtesy of MERCEDES-BENZ OF NORTH AMERICA.