DTC P314A-31: Motor Electronics Coolant Pump "A" No Signal [09/2023 - ]: Description
WARNING: This page is about a different car, the 2024 Lexus TX 500h. 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 ECM.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | 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 ECM when the ignition switch is turned to ON (READY).* (1 trip detection logic) |
|
Comes on | Engine | A |
|
*: 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 ECM 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 ECM power source circuit is detected.
RELATED DATA LIST
| DTC No. | Data List |
|---|---|
| P314A-31 | Engine
Hybrid Control
|
RELATED ACTIVE TEST
| DTC No. | Active Test |
|---|---|
| P314A-31 | Control the Intercooler Water Pump |