Power Source Mode does not Change to ON (ACC): Description

When the key is in the vehicle and the engine switch is pressed, the power management control ECU receives a signal and changes the power source mode.

Use this troubleshooting procedure when the power source mode does not change to on (ACC) but does change to on (IG).

HINT: 

• When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode changes to on (IG).
• When the battery cable is disconnected and reconnected, the power source mode returns to the mode it was in before the battery cable was disconnected.