Serial Data Power Mode

On vehicles that have several modules connected by serial data circuits, one module is Power Mode Master (PMM). On this vehicle, PMM is the Dash Integration Module (DIM). PMM receives 4 signals from ignition switch. To determine correct power mode, PMM uses the following circuits:

• Accessory voltage.
• Ignition 1 voltage.
• Ignition 3 voltage.
• Off/Run/Crank voltage.