DTC P26CA-12: Engine Coolant Pump Circuit Short to Battery [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 ECM calculates the necessary cooling amount based on the engine coolant temperature, engine speed and vehicle speed, and controls the inverter water pump with motor assembly accordingly. The inverter water pump with motor assembly controls the speed of the inverter water pump with motor assembly steplessly and optimally based on a duty cycle signal sent by the ECM, which reduces engine warm-up time, improves fuel efficiency and reduces cooling loss.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Note |
|---|---|---|---|---|---|
| P26CA-12 | Engine Coolant Pump Circuit Short to Battery | The operation duty ratio signal (WPO) of the inverter water pump with motor assembly is a certain value or more when the inverter water pump with motor assembly operation signal is being output (1 trip detection logic). |
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Comes on |
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RELATED DATA LIST
| DTC No. | Data List |
|---|---|
| P26CA-12 |
|