Functional Description
- Make
- Alfa Romeo
- Model
- 155 Factory Service Manual
- Year
- 1992–1998
- Section
- Functional Description › Functional Description
Functional Description
Information regarding air temperature at various points of the system is sent to the control unit Q21a by four sensors. The outside air temperature sensor Q24 sends a signal which is proportional to to the temperature at pin 8 of connector B.
The upper and lower mixed air temperature sensors, Q25a and Q25b, are connected at connector B, to pins 5 and 9 respectively.
The passenger compartment temperature sensor Q33 sends the temperature signal to pin 7 of connector B: this sensor has an incorporated ventilation motor supplied by the same line which, coming from relay I35 and fuse F13 (20A) in fusebox G1, supplies the control unit Q21a. Pin 5 of connector B supplies the "return earth" for the sensors
Components and Connectors
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