Serial Data Power Mode: Notes
On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle the PMM is the DIM. The PMM receives 4 signals from the ignition switch.
To determine the correct power mode the PMM uses the following circuits:
- Accessory voltage
- Crank voltage
- Ignition 1 voltage
- Off/Run/Crank voltage
4-Wire Ignition Switch Table
| Ignition Switch Position | Accessory (Ign. Accessory) | Crank (Ignition Crank) | IGN 1 (Run/Crank) | Off/Run/Crank (Ign. Off/Run/Crank) | Power Mode Transmitted |
|---|---|---|---|---|---|
| Off | 0 | 0 | 0 | 0 | Off/Awake or RAP |
| Start | 0 | 1 | 1 | 1 | Crank |
| Run | 1 | 0 | 1 | 1 | Run |
| Accessory | 1 | 0 | 0 | 1 | Accessory |