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Running-on

Running-on


Running-on is a function that is activated when the power supply to engine control module pin 24 (+ 15) has been cut, i.e. when the ignition key is turned to OFF. The control module determines whether to turn off the main relay based on whether +15 is present or not.

+15 not present

If +15 disappears, it is assumed that the ignition key has been turned to OFF. This is when the real running-on starts.

Running-on duration

Running-on duration is 40 seconds and the system is monitored by DICE. This is important as DICE needs information on engine temperature to run the radiator fan and ACC needs it to control the circulation pump.

When clearing DTCs, the ignition must be switched off at least 10 seconds before the DTCs are cleared.