This function is used to run a function test of the heater unit after repair. During the test-drive, the heater's operating mode changes depending on coolant temperature between start, full load, partial load, after-circulation, and control pause.
Note:
The heater unit may not be activated in closed rooms without exhaust extraction fans.
The heater unit may not be activated in rooms where there is risk of fire and explosion.
Test conditions:
Engine idling.
No faults stored.
Heater unit disconnected at start of the function.
Passenger compartment fan at highest speed and temperature at max.
Procedure:
Start the function and follow the instructions in the program.
If the function is cancelled by the user, the heater unit will go to after-circulation before it turns off completely.