Rear Window Defogger

The heater and A/C programmer receives the rear defogger request from the heater and A/C control assembly. The heater and A/C programmer will then send a Class 2 message to the body control module (SBM). The SBM will control the rear defogger on/off status and the amount of time that the rear defogger is on. The SBM will communicate the rear defogger status to the heater and A/C programmer over the Class 2 serial data and the heater and A/C programmer will light the rear defogger indicator accordingly.

The heated mirrors are activated when the heater and A/C programmer receives the rear defogger request from the heater and A/C control assembly. The heater and A/C programmer will then send a Class 2 serial data message to the drivers door module (DDM). The DDM will control the drivers heated mirror on/off status and the amount of time that drivers heated mirror is on. When the Class 2 request is received by the DDM from the heater and A/C programmer, the DDM will communicate to the passengers door module (PDM) over a simple bus interface (SBI). The PDM will control the passengers heated mirror, the on/off status, and the amount of time the heated mirror is on.