DTC P1445 (62): Bypass Contactor Problem: General Description

The high voltage contactor between the battery module and the motor power inverter (MPI) module is turned on to activate the integrated motor assist (IMA) system after turning the ignition switch on. Before turning the high voltage contactor on, the bypass contactor is turned on and the motor drive module (MDM) condenser is charged gradually by current limited by the bypass resistor. When the difference between the voltage on the MPI module side and the battery module side is within a set range, the high voltage contactor is turned on, then the bypass contactor is turned off.

If the difference between the voltage on the MPI module side and the battery module side is out of a set range for a specified time after the bypass contactor is turned on, a malfunction is detected and a DTC is stored.