DTC P0A11-12: DC/DC Converter Enable Circuit Short to Battery [12/2023 - ]: Description
WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.
Refer to the description for DTC P1CCC-96.
Refer to DESCRIPTION
The hybrid vehicle control ECU assembly sends a signal to the DC/DC converter to prohibit its control and receives signals indicating a normal or abnormal (below 11 V) condition of the 12 V charging system from the DC/DC converter via the NODD signal line.
If the vehicle is being driven with an inoperative DC/DC converter, the voltage of the auxiliary battery will drop, which will prevent the continued operation of the vehicle. Therefore, the motor generator control ECU monitors the operation of the DC/DC converter and alerts the driver if it detects a malfunction.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|---|
| P0A11-12 | DC/DC Converter Enable Circuit Short to Battery | Short to +B detected in DC/DC converter NODD signal line (1 trip detection logic) |
|
Does not come on | Master Warning: Comes on |
Hybrid Control | A | SAE Code: P0A13 |