Monitor Description

The ECM (Included in HV control ECU) and HV control ECU are connected by a communication line called CAN. The ECM (Included in HV control ECU) sends information on the engine speed and other data to the HV control ECU while the HV control ECU sends the information such as a requirement for the engine power to the ECM (Included in HV control ECU) using the CAN communication line. When the communication between the ECM (Included in HV control ECU) and HV control ECU is normal and the following items become specific condition, the ECM (Included in HV control ECU) will illuminate the MIL and set a DTC.

1. Engine speed
2. Ignition switch
3. Target torque
4. Ratio of target torque against estimated torque
5. Fuel level