DTC P0AA0-00: Hybrid/EV Battery Positive Contactor Circuit Stuck Closed [11/2022 - ]: Description
WARNING: This page is about a different car, the 2025 Toyota Corolla Cross, 2024 Toyota Corolla Cross, and 2023 Toyota Corolla Cross. However, it is still accessible from the selected car via links, so may be relevant.
The SMRs (System Main Relays) are the relays that connect or disconnect the high-voltage system in accordance with commands from the hybrid vehicle control ECU.
There are 2 SMRs. SMRB and SMRG are located in the HV battery junction block assembly.
To shut off the high voltage power system, SMRB and SMRG are turned off.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | Note |
|---|---|---|---|---|---|---|
| P0AA0-00 | Hybrid/EV Battery Positive Contactor Circuit Stuck Closed | Even the system main relay of HV battery positive (+) terminal side is turned off, the inverter voltage (VH) does not drop. (1 trip detection logic) |
|
Does not come on | Master Warning: Comes on |
SAE Code: P0AA1 |