DTC P1CCC-96: DC/DC Converter Enable Component Internal Failure [12/2019 - 10/2021]: Description
The DC/DC converter converts the DC 288 V of the HV battery into DC 12 V in order to supply power to areas such as the vehicle lighting system, audio system and various ECUs. Additionally, it charges the auxiliary battery.
A transistor bridge circuit initially converts DC 288 V into alternating current, and a transformer lowers the voltage.
The DC/DC converter controls the output voltage in order to keep a constant voltage at the terminals of the auxiliary battery.
Then, it is rectified and smoothed (into direct current) and converted into DC 12 V.
The motor generator control ECU sends a signal to the DC/DC converter to prohibit its control and receives signals indicating a normal or abnormal condition of the 12 V charging system via the NODD signal line.
If the DC/DC converter malfunctions, the vehicle will become inoperative. Therefore, the motor generator control ECU monitors the operation of the DC/DC converter and detects malfunctions.
This DTC is stored when the DC/DC converter circuit has a malfunction or its operation is prohibited by a fail-safe function, or the auxiliary battery voltage drops to 11 V or less with the ignition switch ON (READY).
If a DC/DC converter malfunction occurs, DC/DC converter malfunction signals are sent from the DC/DC converter to the MG ECU via the NODD signal line.
This DTC may also be stored if a malfunction of the inverter cooling system (blockage, inverter water pump malfunction, etc.) or a high-voltage insulation malfunction occurs.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate |
|---|---|---|---|---|---|
| P1CCC-96 | DC/DC Converter Enable Component Internal Failure | Both of the following conditions are met:
(1 trip detection logic) |
|
Does not come on | Master Warning: Comes on |
HINT:
*: If the DC/DC converter is malfunctioning, its operation and charging will be stopped and the auxiliary battery voltage will drop.