Circuit Description

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

The driver door module (DDM) and passenger door module (PDM) provide the door lock motor control output functions. These output controls allow the DDM and PDM to command the door lock motors to Lock and Unlock. When the DDM or PDM detects an active lock or unlock input from a door lock switch, the DDM or PDM will command the door lock motor to Lock or Unlock. Each door module accomplishes this by applying voltage to the door lock or unlock control circuit depending on the desired action. Each door module monitors the control circuits voltage. If the voltage level drops below 7 volts for longer than 200 milliseconds, a DTC is set.

The DDM and PDM also provide the mirror heater control output functions. These output controls allow the DDM and PDM to command the mirror heaters to switch on. When the DDM and PDM receive a message on the serial data line indicating the rear defogger was turned ON, they will activate their respective mirror heater by applying voltage to the mirror heater control circuit. Each door module monitors the control circuits voltage. If the voltage level drops below 7 volts for longer than 200 milliseconds, a DTC is set.