Faulty Voltage Control Unit (VCU)
Voltage Control Unit (VCU) harness is open or shorted
Voltage Control Unit (VCU) circuit poor electrical connection
Faulty Motor Control Module
Engine Light ON (or Service Engine Soon Warning Light)
The motor control module controls the voltage of motor control module based on voltage sensor signal from the Voltage Control Unit (VCU. If the detected value of the output voltage V1PL, V1NL from the voltage sensor is less than the specified value and continues to be so for a set time, the motor control module detects a malfunction and stores a DTC.