DTC P1D9D: General Description

Courtesy of HONDA, U.S.A., INC.

The power control unit (PCU) monitors the IGBT chip temperature sensor value to prevent malfunction of the chip due to heat generation. The PCU calculates the difference in output temperature between the parallel phases of the IGBT chip temperature sensor at the voltage control unit (VCU) side. If the difference is out of a specified value for a specified time, the motor control module in the PCU detects a malfunction and stores a DTC.