A/C pressure sensor(B12/2) details
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Junior Member
Joined: Nov 2013
Posts: 24
Likes: 1
2001 Mercedes C Class C200 CDI(W203)
A/C pressure sensor(B12/2) details
Hi All,
Can someone please tell me a way to test the B12/2 Refrigerant temp and pressure sensor installed at the bottom of the condensor with a multimeter?
As I understand, it sends the signal(voltage?) to the radiator fan to increase speed depending on the refrigerant pressure and temperature so there must surely be a way to test the same with a multimeter? If so, what are the expected values(voltage) and description of the 4 wires coming from the sensor?
Im facing a/c issues with little or no cooling and want to simulate the output from the sensor to confirm (a) Pressure sensor is working and (b) Wiring & continuity from the sensor towards the SAM/FAN is OK.
Appreciate if someone can also share the pressure specs of the W203 HVAC system, wiring diagram and specs of the B12/2 sensor with expected values.
Thanks & Cheers!
Can someone please tell me a way to test the B12/2 Refrigerant temp and pressure sensor installed at the bottom of the condensor with a multimeter?
As I understand, it sends the signal(voltage?) to the radiator fan to increase speed depending on the refrigerant pressure and temperature so there must surely be a way to test the same with a multimeter? If so, what are the expected values(voltage) and description of the 4 wires coming from the sensor?
Im facing a/c issues with little or no cooling and want to simulate the output from the sensor to confirm (a) Pressure sensor is working and (b) Wiring & continuity from the sensor towards the SAM/FAN is OK.
Appreciate if someone can also share the pressure specs of the W203 HVAC system, wiring diagram and specs of the B12/2 sensor with expected values.
Thanks & Cheers!
Member
Joined: Sep 2015
Posts: 98
Likes: 1
C230k
Hi All,
Can someone please tell me a way to test the B12/2 Refrigerant temp and pressure sensor installed at the bottom of the condensor with a multimeter?
As I understand, it sends the signal(voltage?) to the radiator fan to increase speed depending on the refrigerant pressure and temperature so there must surely be a way to test the same with a multimeter? If so, what are the expected values(voltage) and description of the 4 wires coming from the sensor?
Im facing a/c issues with little or no cooling and want to simulate the output from the sensor to confirm (a) Pressure sensor is working and (b) Wiring & continuity from the sensor towards the SAM/FAN is OK.
Appreciate if someone can also share the pressure specs of the W203 HVAC system, wiring diagram and specs of the B12/2 sensor with expected values.
Thanks & Cheers!
Can someone please tell me a way to test the B12/2 Refrigerant temp and pressure sensor installed at the bottom of the condensor with a multimeter?
As I understand, it sends the signal(voltage?) to the radiator fan to increase speed depending on the refrigerant pressure and temperature so there must surely be a way to test the same with a multimeter? If so, what are the expected values(voltage) and description of the 4 wires coming from the sensor?
Im facing a/c issues with little or no cooling and want to simulate the output from the sensor to confirm (a) Pressure sensor is working and (b) Wiring & continuity from the sensor towards the SAM/FAN is OK.
Appreciate if someone can also share the pressure specs of the W203 HVAC system, wiring diagram and specs of the B12/2 sensor with expected values.
Thanks & Cheers!
