Afterblow Function

The afterblow function helps to removes condensation from the evaporator core.

The BCM begins a timed delay after the ignition is turned OFF. After the delay time elapsed, the BCM sends a serial data message to the heater and A/C programmer in order turn on the blower. After the afterblow function is complete, the heater and A/C programmer turns off the blower. Then the heater and A/C programmer sends a serial data message to the BCM in order to enable the battery guard function.