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

When the engine switch is pushed with the key in the cabin, the power management control ECU receives signals to switch the power source mode.

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

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.