DTC P1D99: General Description
The power control unit (PCU) controls the PCU electric coolant pump according to the rotational speed of the PCU electric coolant pump calculated from the frequency (duty fixed to 50 %) detected from the NEWP terminal. If the detection duty of the NEWP terminal (NEWPDUTY) is out of a specified value for a specified time, the motor control module in the PCU detects a malfunction and stores a DTC.