Automatic Climate Control

A fault-diagnosis and monitoring program is included in the climate control unit in the ACC system. Certain functions are monitored continuously when the system is operating, but others must be checked manually.


The following functions are monitored automatically while the system is operating:
^ The inside air sensor
^ The ambient air temperature sensor
^ Blended air sensor.


In the event of a malfunction in any of the sensors, an emergency program will be initiated. The fault can then be diagnosed by a manually initiated test.


The following functions are not monitored automatically:
^ The servomotors for the temperature valve
^ Air distribution valve
^ Air recirculation valve
^ Fan motor
^ Fan control unit
^ The sun sensor monitored automatically on the road.