DTC P0AE4-11: Hybrid/EV Battery Precharge Contactor Circuit Short to Ground [11/2021 - ]: Description
WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. 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 3 SMRs and 1 system main resistor. SMRB, SMRP, SMRG and the system main resistor are located in the HV battery junction block assembly.
To connect to the high voltage power system, the vehicle will first turn on SMRP and SMRB to charge the vehicle through the system main resistor. Then, SMRP will be turned off after SMRG is turned on. 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 |
|---|---|---|---|---|---|
| P0AE4-11 | Hybrid/EV Battery Precharge Contactor Circuit Short to Ground | Short to ground in the SMRP circuit: Primary circuit of SMRP is malfunctioning. (2 trip detection logic) |
|
Does not come on | Master Warning: Comes on |