Coolant Temperature Sensor, Design

Coolant Temperature Sensor, Design

Metal housing with 2 separate NTC resistors. 4-pin plug connection, diagonally different resistances.

Contact assignment at connector:
Connection 1 and 4: ME-SFI control module
Connection 2 and 3: Automatic air conditioning control module (N22) or air conditioning control module (N19).




B11/4 Coolant temperature sensor (engine 119)
B11/9 Left coolant temperature sensor (engine 120)
B11/10 Right coolant temperature sensor (engine 120)

Example of coolant temperature
20 °C 2 500 ohms ± 5% between connection 1 and 4
6 500 ohms ± 5% between connection 2 and 3
80 °C 325 ohms ± 5% between connection 1 and 4
650 ohms ± 5% between connection 2 and 3