DTC P314A-31: Motor Electronics Coolant Pump "A" No Signal [08/2023 - ]: Description
WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. 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.