Outside Temperature

Fig 1: Identifying Outside Temperature Input And Output Signals

Courtesy of VOLVO CARS CORPORATION

The outside temperature gauge is integrated in the tachometer. Its function is to display the outside temperature and to warn the driver when the conditions are icy by displaying a symbol of a snowflake. The snowflake is displayed at a range of -5 to +2 °C.

A sensor which detects the outside temperature is mounted in the right-hand door mirror. The temperature signal is then read off by either the passenger door module (3/127). The value is transmitted via the Control area network (CAN) to the central electronic module (4/56) which then forwards the message to the driver's information module (5/1). The temperature is displayed in Celsius or Fahrenheit, depending on the market, in increments of one degree. The temperature unit can be changed when reprogramming.