Circuit/System Verification
- Verify that DTC U1814 or B1428 is not set.
- If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- With a scan tool, access BCM, Power Mode data display list and compare all parameters listed with the corresponding ignition key position. The PMM Power Mode Parameters table below illustrates the correct state of these input parameters in correspondence to the ignition switch position. The circuits which the individual parameters are related to are in parentheses.
- If any parameters are incorrect in any key position, refer to the Circuit/System Testing or Component Testing.
PMM Power Mode Parameters
| Ignition Switch Position | Current Power Mode | Ign. Off/Run/Crank (Terminal 4) |
Ignition Accessory/Run (Terminal 3) |
Ignition Run/Crank (Terminal 1) |
|---|---|---|---|---|
| Off Key Out | Off | Key Out/ACC | Inactive | Inactive |
| Off Key IN | Off | Key In/Off | Inactive | Inactive |
| Accessory | Accessory | Key Out/ACC | Active | Inactive |
| Run | Run | Run | Active | Active |
| Start | Crank Request | Crank | Inactive | Active |