DTC P1CCC-49: DC/DC Converter Internal Electronic Failure [09/2022 - ]: Description

WARNING: This page is about a different variant/trim than selected.

The DC/DC converter converts the voltage from the HV battery to supply power to the vehicle lights, audio system and various ECUs, etc.

At the same time, it performs charging of the auxiliary battery, controlling the output voltage to maintain a specific voltage at the auxiliary battery terminal.

Via CAN communication, the hybrid vehicle control ECU sends stop commands to the DC/DC converter, and receives DC/DC converter Normal/Malfunction status signals.

When the DC/DC converter is stopped due to a circuit malfunction and the auxiliary battery voltage becomes 11 V or less during READY ON, this DTC is stored.

This DTC may also be stored if a high-voltage insulation malfunction occurs.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate	Note
P1CCC-49	DC/DC Converter Internal Electronic Failure	Any of the following conditions are met: DC/DC converter is malfunction, and auxiliary battery voltage is 11 V or less* DC/DC converter is malfunction for 5 seconds or more (1 trip detection logic)	Hybrid vehicle control ECU Inverter with converter assembly Hybrid vehicle transaxle assembly Wire harness or connector DC/DC fuse PCU NO. 2 fuse	Does not come on	Master Warning: Comes on	SAE Code: P1CCC

HINT:

*: If the DC/DC converter is malfunctioning, its operation and charging will be stopped and the auxiliary battery voltage will drop.