Operation With Ignition Off

There is a risk of the coolant overheating even when the ignition is OFF. To prevent this, DICE can activate the radiator fan on the basis of information from the engine coolant temperature sensor (via the MIU). Coolant temperature information signals, occur 30 and 60 seconds after the ignition has been turned OFF.
Using this information together with radiator fan status at ignition OFF, DICE can activate the fan (low speed if it is a 2-speed fan). The radiator fan can be activated up to 20 minutes after ignition OFF and can run for up to 3.5 minutes.

Radiator fan does not run when ignition turned from ON to OFF

30 seconds after ignition OFF:
^ The radiator fan starts and runs for 3 minutes if the coolant temperature is 107°C or above. The fan stops after 3 minutes.
^ The radiator fan starts and runs for 30 seconds if the coolant temperature is between 103°C and 107°C.

60 seconds after ignition OFF:
^ Only applicable if the coolant temperature was between 103 and 107°C 30 seconds after ignition OFF.
^ The radiator fan continues to run for 3 minutes if the coolant temperature is 107°C or above.
^ The radiator fan stops if the coolant temperature is below 107°C.

Radiator fan runs at low speed when ignition turned from ON to OFF




^ The radiator fan continues to run for 30 seconds if the coolant temperature is 103°C or above.
^ The radiator fan stops if the coolant temperature is below 103°C.

30 seconds after ignition OFF:
^ If the radiator fan did not stop when the ignition was turned OFF, it will continue to run for 3 minutes if the coolant temperature is 107°C or above. After 3 minutes the fan will stop. If the coolant temperature is below 107°C the fan will stop.
^ If the radiator fan stopped when the ignition was turned OFF, it will start and run for 3 minutes if the coolant temperature is 107°C or above. After 3 minutes the fan will stop. If the coolant temperature is between 103°C and 107°C,the fan will start and run for 30 seconds. If the coolant temperature is below 103°C the fan will stop.

60 seconds after ignition OFF:
Only applicable if the coolant temperature was between 103°C and 107°C 30 seconds after ignition OFF.
^ The radiator fan continues to run for 3 minutes if the coolant temperature is 107°C or above.
^ The radiator fan stops if the coolant temperature is below 107�C.


Radiator fan runs at high speed when ignition turned from ON to OFF
Immediately after ignition OFF the fan starts and runs at low speed for 2 seconds. At the end of this time the same logic applies as when the radiator fan runs at low speed when the ignition is turned from ON to OFF.