DTC P314A-31: Motor Electronics Coolant Pump "A" No Signal [10/2022 - ]: Description
WARNING: This page is about a different car, the 2025 Lexus RX 350h, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. However, it is still accessible from the selected car via links, so may be relevant.
Refer to the description for DTC P0C73-96.
Refer to DESCRIPTION
The inverter water pump assembly sends the inverter water pump speed (measured value) signal to the hybrid vehicle control ECU.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|---|
| P314A-31 | Motor Electronics Coolant Pump "A" No Signal | The inverter water pump speed signal is not sent to the hybrid vehicle control ECU when the ignition switch is turned to ON (READY).* (1 trip detection logic) |
|
Comes on | Master Warning: Comes on |
Hybrid Control | A | SAE Code: P314A |
*: Any of the following conditions is met.
- A malfunction (open, short to +B or short to ground) in the speed signal line from the inverter water pump assembly to the hybrid vehicle control ECU is detected.
- A malfunction in the +B line is detected.
- A malfunction in the inverter water pump assembly power source circuit is detected.
- A malfunction in hybrid vehicle control ECU power source circuit is detected.