Operation at Electric Power OFF

If the electric power is OFF, transmission control ECU receives a signal from the power source control ECU by multi-communication, and sends the shift position information to the hybrid vehicle control ECU. The hybrid vehicle control ECU then sends a signal to the power source control ECU to tell whether it is correct or not to turn off the electric power. Accepted conditions for the electric power OFF are as follows;

* When the hybrid vehicle control ECU is not sending request signals for the parking lock release and the shift lever is in the P position.

* With the shift position is in a position other than P, and the hybrid vehicle control ECU is outputting signals that the hybrid system is not running or is requesting signals for a parking lock.

* When the motor is not running because of an abnormality, the paring lock is in operation, the hybrid system is not running and the parking brake is being applied.